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Daikin T Series Service Manual
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Daikin T Series Service Manual

Daikin T Series Service Manual

Vrv water cooled system
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SiUS301716EE
Service
Manual
RWEQ-TA/TB Series
Heat Pump 60 Hz
Heat Recovery 60 Hz

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Summary of Contents for Daikin T Series

  • Page 1 SiUS301716EE Service Manual RWEQ-TA/TB Series Heat Pump 60 Hz Heat Recovery 60 Hz...
  • Page 2 SiUS301716EE Introduction ..................1 1. Safety Cautions................... 2 1.1 Warnings and Cautions Regarding Safety of Workers......... 2 1.2 Warnings and Cautions Regarding Safety of Users........4 2. Icons Used ....................7 3. Revision History ..................8 Part 1 General Information ............... 9 1.
  • Page 3 SiUS301716EE 2.3 Wireless Remote Controller ..............113 3. Main/Sub Setting..................114 3.1 BRC1E73 ....................114 3.2 BRC1H71W....................116 3.3 When Wireless Remote Controller is Used Together....... 118 4. Address Setting for Wireless Remote Controller........119 5. Centralized Control Group No. Setting............121 5.1 BRC1E73 ....................121 5.2 BRC1H71W....................
  • Page 4 SiUS301716EE 7.3 Pump Down Residual Control ..............165 7.4 Refrigerant Drift Prevention..............167 8. Other Control...................168 8.1 Outside Unit Rotation ................168 8.2 Exhaust Heat Cancellation Operation ............169 8.3 Water Quantity Control................170 8.4 Backup Operation..................173 8.5 Demand Operation ................... 173 9.
  • Page 5 SiUS301716EE 4. Test Operation ..................278 4.1 Procedure and Outline ................278 Part 6 Service Diagnosis ............... 283 1. Symptom-based Troubleshooting ............286 1.1 Indoor Unit Overall ................... 286 1.2 With Infrared Presence/Floor Sensor ............289 2. Error Code via Remote Controller............290 2.1 BRC1E73 ....................
  • Page 6 SiUS301716EE 3.36 Electronic Expansion Valve Coil Abnormality........... 362 3.37 Discharge Pipe Temperature Abnormality ..........363 3.38 Suction Pipe Temperature Abnormality............ 365 3.39 Refrigerant Overcharged................367 3.40 Branch Selector Unit Electronic Expansion Valve Abnormality....369 3.41 Harness Abnormality (between Outside Unit Main PCB and Inverter PCB)......................
  • Page 7 SiUS301716EE 4.9 Thermistor Check ..................440 4.10 Pressure Sensor Check ................443 4.11 Broken Wire Check of the Relay Wires ............ 444 4.12 Fan Motor Connector Check (Power Supply Cable) ........ 446 4.13 Fan Motor Connector Check (Signal Cable) ..........447 4.14 Electronic Expansion Valve Coil Check ...........
  • Page 8 SiUS301716EE Introduction 1. Safety Cautions................... 2 1.1 Warnings and Cautions Regarding Safety of Workers......... 2 1.2 Warnings and Cautions Regarding Safety of Users........4 2. Icons Used ....................7 3. Revision History ..................8 Introduction...

  • Page 9: Caution Items

    SiUS301716EE Safety Cautions 1. Safety Cautions Be sure to read the following safety cautions before conducting repair work. After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer. This manual is for the person in charge of maintenance and...
  • Page 10 Safety Cautions SiUS301716EE Warning Be sure to discharge the capacitor completely before conducting repair work. The step-up capacitor supplies high-voltage electricity to the electrical components of the outdoor unit. A charged capacitor may cause an electrical shock. Do not turn the air conditioner on or off by plugging in or unplugging the power cable.

  • Page 11: Warnings And Cautions Regarding Safety Of Users

    SiUS301716EE Safety Cautions Caution Be sure to check that the refrigerating cycle section has cooled down enough before conducting repair work. Working on the unit when the refrigerating cycle section is hot may cause burns. Conduct welding work in a well-ventilated place. Using the welder in an enclosed room may cause oxygen deficiency.
  • Page 12 Safety Cautions SiUS301716EE Warning Do not mix air or gas other than the specified refrigerant (R-410A) in the refrigerant system. If air enters the refrigerant system, an excessively high pressure results, causing equipment damage and injury. If the refrigerant gas leaks, be sure to locate the leaking point and repair it before charging the refrigerant.
  • Page 13 SiUS301716EE Safety Cautions Caution Be sure to measure insulation resistance after the repair, and make sure that the resistance is 1 M or greater. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage may cause water to enter the room and wet the furniture and floor.

  • Page 14: Icons Used

    Icons Used SiUS301716EE 2. Icons Used The following icons are used to attract the attention of the reader to specific information. Icon Type of Description Information Warning Warning is used when there is danger of personal injury. Warning Caution Caution is used when there is danger that the reader, Caution through incorrect manipulation, may damage equipment, lose data, get an unexpected result or have to restart (part...

  • Page 15: Revision History

    SiUS301716EE Revision History 3. Revision History Month / Year Version Revised contents 01 / 2018 SiUS301716E First edition 11 / 2018 SiUS301716EA Model addition: RWEQ96-432TAYCU, FXSQ05-54TAVJU 03 / 2020 SiUS301716EB Model addition: RWEQ96-432TATJA, RWEQ96-432TAYDA 02 / 2021 SiUS301716EC Model addition: BSF4-8Q54TVJ, BRC1H71W 03 / 2022 SiUS301716ED Model addition: FXZQ05-18TBVJU, FXUQ18-36PAVJU, BSQ36-96TAVJ, BS4-12Q54TAVJ...

  • Page 16: Table Of Contents

    SiUS301716EE Part 1 General Information 1. Features and Benefits ................10 2. Model Names ....................11 2.1 Outside Units....................11 2.2 Branch Selector Unit .................. 11 2.3 Indoor Unit....................12 2.4 Air Treatment Equipment ................12 3. External Appearance................. 13 3.1 Outside Units....................13 3.2 Branch Selector Unit ..................

  • Page 17: Features And Benefits

    Engineered for easy service with drop-down switch box to access key components  Seamless integration to full suite of Daikin Control Solutions for complete system control  Backed by 10 year parts limited warranty and 10 years replacement compressor limited warranty (3) ...

  • Page 18: Model Names

    Model Names SiUS301716EE 2. Model Names Outside Units Capacity Range 6 ton 8 ton 10 ton 12 ton 14 ton 16 ton 18 ton 20 ton Power Supply, Capacity Index Standard — 96TA 120TA 144TA — 192TA 216TA 240TA 208/230 V RWEQ 72TB 96TB...

  • Page 19: Indoor Unit

    SiUS301716EE Model Names Indoor Unit Capacity range (ton) 1.25 Power supply, Standard Capacity index Ceiling mounted — 07AA 09AA 12AA 15AA 18AA — 24AA 30AA 36AA — 48AA 54AA — — — cassette (Round flow with — — — — —...

  • Page 20: External Appearance

    External Appearance SiUS301716EE 3. External Appearance Outside Units 6, 8, 10, 12 ton RWEQ96TA RWEQ120TA RWEQ144TA RWEQ72TB RWEQ96TB RWEQ120TB RWEQ144TB 14, 16, 18, 20, 22, 24 ton RWEQ192TA RWEQ216TA RWEQ240TA RWEQ264TA RWEQ288TA RWEQ168TB RWEQ192TB RWEQ216TB RWEQ240TB RWEQ264TB RWEQ288TB 26, 28, 30, 32, 34, 36 ton (35.5 ton for 575 V units) RWEQ312TA RWEQ336TA RWEQ360TA...

  • Page 21: Branch Selector Unit

    SiUS301716EE External Appearance Branch Selector Unit Single Branch Selector Unit BSQ-T BSQ-TA Multi Branch Selector Unit (Standard Series) BS-Q54T BS-Q54TA Multi Branch Selector Unit (Flex Series) BSF-Q54T Part 1 General Information...

  • Page 22: Indoor Unit

    External Appearance SiUS301716EE Indoor Unit Ceiling mounted cassette (Round flow with sensing) type Slim ceiling mounted duct type FXFQ-AA FXDQ-M Shown with BYCQ54EEFU Ceiling mounted cassette (Round flow with sensing) type MSP concealed ducted type FXFQ-T FXSQ-TA FXSQ-TB Shown with BYCQ125B-W1 Ceiling mounted cassette (Round flow) type Ceiling mounted duct type (Middle and high static pressure) FXFQ-P...

  • Page 23: Air Treatment Equipment

    SiUS301716EE External Appearance Wall mounted type Concealed floor standing type FXAQ-P FXNQ-M Floor standing type Air handling unit FXLQ-M FXTQ-TA FXTQ-TB Air Treatment Equipment Outdoor-air processing unit Energy recovery ventilator (VAM series) FXMQ-MF VAM-G Part 1 General Information...

  • Page 24: Combination Of Outside Units

    Combination of Outside Units SiUS301716EE 4. Combination of Outside Units System capacity Module Number of Outside unit multi connection Model name units piping kit (option) 1 6 ton 8 ton 10 ton 12 ton RWEQ72TB  RWEQ96TA 10.0  RWEQ96TB —...

  • Page 25: Capacity Range

    It is permitted to use a maximum connection ratio of 130% in some circumstances – please contact your local Daikin representative for further details. For indoor units used for cooling only (do not connect to Branch Selector unit when using 5.

  • Page 26: Indoor Unit Connection Capacity

    Capacity Range SiUS301716EE Indoor Unit Connection Capacity Outside unit multi Total capacity index of Maximum number Capacity Type Model name Combination connection piping kit connectable indoor of connectable index (1) units (2) indoor units RWEQ72TB RWEQ72TB 48 to 93 (108) RWEQ96TA RWEQ96TA 48 to 124 (144)
  • Page 27 SiUS301716EE Capacity Range Outside unit multi Total capacity index of Maximum number Capacity Type Model name Combination connection piping kit connectable indoor of connectable index (1) units (2) indoor units RWEQ96TA+ RWEQ312TA RWEQ96TA+ RWEQ120TA 156 to 405 (468) RWEQ96TB+ RWEQ312TB RWEQ96TB+ RWEQ120TB RWEQ96TA+...

  • Page 28: Limitation Of Capacity Index For Heat Recovery

    Capacity Range SiUS301716EE Limitation of Capacity Index for Heat Recovery Single Branch Selector Unit BSQ36TVJ BSQ60TVJ BSQ96TVJ Model BSQ36TAVJ BSQ60TAVJ BSQ96TAVJ Maximum number of connectable indoor units Total capacity index of 36 or less More than 36 and 60 or less More than 60 and 96 or less connectable indoor units Multi Branch Selector Unit (Standard Series)

  • Page 29: Specifications

    SiUS301716EE Specifications 6. Specifications RWEQ-TATJU, RWEQ-TATJA, RWEQ-TBTJA Model Name RWEQ72TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 72,000 (21.1) Btu/h (kW) Rated 69,000 (20.2) 2 Heating Capacity Nominal 81,000 (23.7) Btu/h (kW) Rated 69,000 (20.2) Casing Color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 30 Specifications SiUS301716EE Model Name RWEQ96TATJU RWEQ96TATJA RWEQ96TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 96,000 (28.1) Btu/h (kW) Rated 92,000 (27.0) 2 Heating Capacity Nominal 108,000 (31.7) Btu/h (kW) Rated 103,000 (30.2) 92,000 (27.0) Casing Color Ivory White (5Y7.5/1) Dimensions: (H ×...

  • Page 31: Part 1 General Information

    SiUS301716EE Specifications Model Name RWEQ120TATJU RWEQ120TATJA RWEQ120TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 120,000 (35.2) 119,000 (34.9) Btu/h (kW) Rated 114,000 (33.4) 2 Heating Capacity Nominal 135,000 (39.6) Btu/h (kW) Rated 129,000 (37.8) 114,000 (33.4) Casing Color Ivory White (5Y7.5/1) Dimensions: (H ×...
  • Page 32 Specifications SiUS301716EE Model Name RWEQ144TATJU RWEQ144TATJA RWEQ144TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 144,000 (42.2) Btu/h (kW) Rated 138,000 (40.4) 2 Heating Capacity Nominal 162,000 (47.5) Btu/h (kW) Rated 154,000 (45.1) 138,000 (40.4) Casing Color Ivory White (5Y7.5/1) Dimensions: (H ×...
  • Page 33 SiUS301716EE Specifications Model (Combination unit) RWEQ168TBTJA Model (Independent unit) RWEQ72TBTJA RWEQ96TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 162,000 (47.5) Btu/h (kW) Rated 156,000 (45.7) 2 Heating Capacity Nominal 189,000 (55.4) Btu/h (kW) Rated 156,000 (45.7) Casing Color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 34 Specifications SiUS301716EE Model Name (Combination Unit) RWEQ192TATJU RWEQ192TATJA RWEQ192TBTJA Model Name (Independent Unit) RWEQ96TATJU RWEQ96TATJA RWEQ96TBTJA RWEQ96TATJU RWEQ96TATJA RWEQ96TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 192,000 (56.3) Btu/h (kW) Rated 184,000 (53.9) 2 Heating Capacity Nominal 216,000 (63.3) Btu/h...
  • Page 35 SiUS301716EE Specifications Model Name (Combination Unit) RWEQ216TATJU RWEQ216TATJA RWEQ216TBTJA Model Name (Independent Unit) RWEQ120TATJU RWEQ120TATJA RWEQ120TBTJA RWEQ96TATJU RWEQ96TATJA RWEQ96TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 216,000 (63.3) Btu/h (kW) Rated 206,000 (60.4) 2 Heating Capacity Nominal 243,000 (71.2) Btu/h...
  • Page 36 Specifications SiUS301716EE Model Name (Combination Unit) RWEQ240TATJU RWEQ240TATJA RWEQ240TBTJA Model Name (Independent Unit) RWEQ120TATJU RWEQ120TATJA RWEQ120TBTJA RWEQ120TATJU RWEQ120TATJA RWEQ120TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 240,000 (70.3) 238,000 (69.8) Btu/h (kW) Rated 228,000 (66.8) 2 Heating Capacity Nominal 270,000 (79.1)
  • Page 37 SiUS301716EE Specifications Model Name (Combination Unit) RWEQ264TATJU RWEQ264TATJA RWEQ264TBTJA Model Name (Independent Unit) RWEQ144TATJU RWEQ144TATJA RWEQ144TBTJA RWEQ120TATJU RWEQ120TATJA RWEQ120TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 264,000 (77.4) Btu/h (kW) Rated 252,000 (73.9) 2 Heating Capacity Nominal 297,000 (87.0) Btu/h...
  • Page 38 Specifications SiUS301716EE Model Name (Combination Unit) RWEQ288TATJU RWEQ288TATJA RWEQ288TBTJA Model Name (Independent Unit) RWEQ144TATJU RWEQ144TATJA RWEQ144TBTJA RWEQ144TATJU RWEQ144TATJA RWEQ144TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 288,000 (84.4) 286,000 (83.8) Btu/h (kW) Rated 274,000 (80.3) 2 Heating Capacity Nominal 324,000 (95.0)
  • Page 39 SiUS301716EE Specifications Model Name (Combination Unit) RWEQ312TATJU RWEQ312TATJA RWEQ312TBTJA Model Name (Independent Unit) RWEQ120TATJU RWEQ120TATJA RWEQ120TBTJA RWEQ96TATJU RWEQ96TATJA RWEQ96TBTJA RWEQ96TATJU RWEQ96TATJA RWEQ96TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 312,000 (91.4) Btu/h (kW) Rated 298,000 (87.3) 2 Heating Capacity Nominal 351,000 (102.9)
  • Page 40 Specifications SiUS301716EE Model Name (Combination Unit) RWEQ336TATJU RWEQ336TATJA RWEQ336TBTJA Model Name (Independent Unit) RWEQ120TATJU RWEQ120TATJA RWEQ120TBTJA RWEQ120TATJU RWEQ120TATJA RWEQ120TBTJA RWEQ96TATJU RWEQ96TATJA RWEQ96TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 336,000 (98.5) Btu/h (kW) Rated 320,000 (93.8) 2 Heating Capacity Nominal 378,000 (110.8)
  • Page 41 SiUS301716EE Specifications Model Name (Combination Unit) RWEQ360TATJU RWEQ360TATJA RWEQ360TBTJA Model Name (Independent Unit) RWEQ120TATJU RWEQ120TATJA RWEQ120TBTJA RWEQ120TATJU RWEQ120TATJA RWEQ120TBTJA RWEQ120TATJU RWEQ120TATJA RWEQ120TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 360,000 (105.5) 358,000 (104.9) Btu/h (kW) Rated 342,000 (100.2) 2 Heating Capacity...
  • Page 42 Specifications SiUS301716EE Model Name (Combination Unit) RWEQ384TATJU RWEQ384TATJA RWEQ384TBTJA Model Name (Independent Unit) RWEQ144TATJU RWEQ144TATJA RWEQ144TBTJA RWEQ120TATJU RWEQ120TATJA RWEQ120TBTJA RWEQ120TATJU RWEQ120TATJA RWEQ120TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 384,000 (112.5) Btu/h (kW) Rated 366,000 (107.3) 2 Heating Capacity Nominal 432,000 (126.6)
  • Page 43 SiUS301716EE Specifications Model Name (Combination Unit) RWEQ408TATJU RWEQ408TATJA RWEQ408TBTJA Model Name (Independent Unit) RWEQ144TATJU RWEQ144TATJA RWEQ144TBTJA RWEQ144TATJU RWEQ144TATJA RWEQ144TBTJA RWEQ120TATJU RWEQ120TATJA RWEQ120TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 408,000 (119.6) 406,000 (119.0) Btu/h (kW) Rated 388,000 (113.7) 2 Heating Capacity...
  • Page 44 Specifications SiUS301716EE Model Name (Combination Unit) RWEQ432TATJU RWEQ432TATJA RWEQ432TBTJA Model Name (Independent Unit) RWEQ144TATJU RWEQ144TATJA RWEQ144TBTJA RWEQ144TATJU RWEQ144TATJA RWEQ144TBTJA RWEQ144TATJU RWEQ144TATJA RWEQ144TBTJA Power Supply 3 phase, 208/230 V, 60 Hz 1 Cooling Capacity Nominal 432,000 (126.6) 422,000 (123.7) Btu/h (kW) Rated 410,000 (120.2) 402,000 (117.8)

  • Page 45: Rweq-Taydu, Rweq-Tayda, Rweq-Tbyda

    SiUS301716EE Specifications RWEQ-TAYDU, RWEQ-TAYDA, RWEQ-TBYDA Model Name RWEQ72TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 72,000 (21.1) Btu/h (kW) Rated 69,000 (20.2) 2 Heating Capacity Nominal 81,000 (23.7) Btu/h (kW) Rated 69,000 (20.2) Casing Color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 46 Specifications SiUS301716EE Model Name RWEQ96TAYDU RWEQ96TAYDA RWEQ96TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 96,000 (28.1) Btu/h (kW) Rated 92,000 (27.0) 2 Heating Capacity Nominal 108,000 (31.7) Btu/h (kW) Rated 103,000 (30.2) 92,000 (27.0) Casing Color Ivory White (5Y7.5/1) Dimensions: (H ×...
  • Page 47 SiUS301716EE Specifications Model Name RWEQ120TAYDU RWEQ120TAYDA RWEQ120TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 120,000 (35.2) 119,000 (34.9) Btu/h (kW) Rated 114,000 (33.4) 2 Heating Capacity Nominal 135,000 (39.6) Btu/h (kW) Rated 129,000 (37.8) 114,000 (33.4) Casing Color Ivory White (5Y7.5/1) Dimensions: (H ×...
  • Page 48 Specifications SiUS301716EE Model Name RWEQ144TAYDU RWEQ144TAYDA RWEQ144TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 144,000 (42.2) Btu/h (kW) Rated 138,000 (40.4) 2 Heating Capacity Nominal 162,000 (47.5) Btu/h (kW) Rated 154,000 (45.1) 138,000 (40.4) Casing Color Ivory White (5Y7.5/1) Dimensions: (H ×...
  • Page 49 SiUS301716EE Specifications Model (Combination unit) RWEQ168TBYDA Model (Independent unit) RWEQ72TBYDA RWEQ96TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 162,000 (47.5) Btu/h (kW) Rated 156,000 (45.7) 2 Heating Capacity Nominal 189,000 (55.4) Btu/h (kW) Rated 156,000 (45.7) Casing Color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 50 Specifications SiUS301716EE Model Name (Combination Unit) RWEQ192TAYDU RWEQ192TAYDA RWEQ192TBYDA Model Name (Independent Unit) RWEQ96TAYDU RWEQ96TAYDA RWEQ96TBYDA RWEQ96TAYDU RWEQ96TAYDA RWEQ96TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 192,000 (56.3) Btu/h (kW) Rated 184,000 (53.9) 2 Heating Capacity Nominal 216,000 (63.3) Btu/h...
  • Page 51 SiUS301716EE Specifications Model Name (Combination Unit) RWEQ216TAYDU RWEQ216TAYDA RWEQ216TBYDA Model Name (Independent Unit) RWEQ120TAYDU RWEQ120TAYDA RWEQ120TBYDA RWEQ96TAYDU RWEQ96TAYDA RWEQ96TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 216,000 (63.3) Btu/h (kW) Rated 206,000 (60.4) 2 Heating Capacity Nominal 243,000 (71.2) Btu/h...
  • Page 52 Specifications SiUS301716EE Model Name (Combination Unit) RWEQ240TAYDU RWEQ240TAYDA RWEQ240TBYDA Model Name (Independent Unit) RWEQ120TAYDU RWEQ120TAYDA RWEQ120TBYDA RWEQ120TAYDU RWEQ120TAYDA RWEQ120TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 240,000 (70.3) 238,000 (69.8) Btu/h (kW) Rated 228,000 (66.8) 2 Heating Capacity Nominal 270,000 (79.1)
  • Page 53 SiUS301716EE Specifications Model Name (Combination Unit) RWEQ264TAYDU RWEQ264TAYDA RWEQ264TBYDA Model Name (Independent Unit) RWEQ144TAYDU RWEQ144TAYDA RWEQ144TBYDA RWEQ120TAYDU RWEQ120TAYDA RWEQ120TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 264,000 (77.4) Btu/h (kW) Rated 252,000 (73.9) 2 Heating Capacity Nominal 297,000 (87.0) Btu/h...
  • Page 54 Specifications SiUS301716EE Model Name (Combination Unit) RWEQ288TAYDU RWEQ288TAYDA RWEQ288TBYDA Model Name (Independent Unit) RWEQ144TAYDU RWEQ144TAYDA RWEQ144TBYDA RWEQ144TAYDU RWEQ144TAYDA RWEQ144TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 288,000 (84.4) 286,000 (83.8) Btu/h (kW) Rated 274,000 (80.3) 2 Heating Capacity Nominal 324,000 (95.0)
  • Page 55 SiUS301716EE Specifications Model Name (Combination Unit) RWEQ312TAYDU RWEQ312TAYDA RWEQ312TBYDA Model Name (Independent Unit) RWEQ120TAYDU RWEQ120TAYDA RWEQ120TBYDA RWEQ96TAYDU RWEQ96TAYDA RWEQ96TBYDA RWEQ96TAYDU RWEQ96TAYDA RWEQ96TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 312,000 (91.4) Btu/h (kW) Rated 298,000 (87.3) 2 Heating Capacity Nominal 351,000 (102.9)
  • Page 56 Specifications SiUS301716EE Model Name (Combination Unit) RWEQ336TAYDU RWEQ336TAYDA RWEQ336TBYDA Model Name (Independent Unit) RWEQ120TAYDU RWEQ120TAYDA RWEQ120TBYDA RWEQ120TAYDU RWEQ120TAYDA RWEQ120TBYDA RWEQ96TAYDU RWEQ96TAYDA RWEQ96TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 336,000 (98.5) Btu/h (kW) Rated 320,000 (93.8) 2 Heating Capacity Nominal 378,000 (110.8)
  • Page 57 SiUS301716EE Specifications Model Name (Combination Unit) RWEQ360TAYDU RWEQ360TAYDA RWEQ360TBYDA Model Name (Independent Unit) RWEQ120TAYDU RWEQ120TAYDA RWEQ120TBYDA RWEQ120TAYDU RWEQ120TAYDA RWEQ120TBYDA RWEQ120TAYDU RWEQ120TAYDA RWEQ120TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 360,000 (105.5) 358,000 (104.9) Btu/h (kW) Rated 342,000 (100.2) 2 Heating Capacity...
  • Page 58 Specifications SiUS301716EE Model Name (Combination Unit) RWEQ384TAYDU RWEQ384TAYDA RWEQ384TBYDA Model Name (Independent Unit) RWEQ144TAYDU RWEQ144TAYDA RWEQ144TBYDA RWEQ120TAYDU RWEQ120TAYDA RWEQ120TBYDA RWEQ120TAYDU RWEQ120TAYDA RWEQ120TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 384,000 (112.5) Btu/h (kW) Rated 366,000 (107.3) 2 Heating Capacity Nominal 432,000 (126.6)
  • Page 59 SiUS301716EE Specifications Model Name (Combination Unit) RWEQ408TAYDU RWEQ408TAYDA RWEQ408TBYDA Model Name (Independent Unit) RWEQ144TAYDU RWEQ144TAYDA RWEQ144TBYDA RWEQ144TAYDU RWEQ144TAYDA RWEQ144TBYDA RWEQ120TAYDU RWEQ120TAYDA RWEQ120TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 408,000 (119.6) 406,000 (119.0) Btu/h (kW) Rated 388,000 (113.7) 2 Heating Capacity...
  • Page 60 Specifications SiUS301716EE Model Name (Combination Unit) RWEQ432TAYDU RWEQ432TAYDA RWEQ432TBYDA Model Name (Independent Unit) RWEQ144TAYDU RWEQ144TAYDA RWEQ144TBYDA RWEQ144TAYDU RWEQ144TAYDA RWEQ144TBYDA RWEQ144TAYDU RWEQ144TAYDA RWEQ144TBYDA Power Supply 3 phase, 460 V, 60 Hz 1 Cooling Capacity Nominal 432,000 (126.6) 422,000 (123.7) Btu/h (kW) Rated 410,000 (120.2) 402,000 (117.8)

  • Page 61: Rweq-Taycu, Rweq-Tbycu

    SiUS301716EE Specifications RWEQ-TAYCU, RWEQ-TBYCU Model Name RWEQ72TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 72,000 (21.1) Btu/h (kW) Rated 69,000 (20.2) 2 Heating Capacity Nominal 81,000 (23.7) Btu/h (kW) Rated 69,000 (20.2) Casing Color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 62 Specifications SiUS301716EE Model Name RWEQ96TAYCU RWEQ96TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 96,000 (28.1) Btu/h (kW) Rated 92,000 (27.0) 2 Heating Capacity Nominal 108,000 (31.7) Btu/h (kW) Rated 103,000 (30.2) 92,000 (27.0) Casing Color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 63 SiUS301716EE Specifications Model Name RWEQ120TAYCU RWEQ120TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 120,000 (35.2) 119,000 (34.9) Btu/h (kW) Rated 114,000 (33.4) 2 Heating Capacity Nominal 135,000 (39.6) Btu/h (kW) Rated 129,000 (37.8) 114,000 (33.4) Casing Color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 64 Specifications SiUS301716EE Model Name RWEQ144TAYCU RWEQ144TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 144,000 (42.2) Btu/h (kW) Rated 138,000 (40.4) 2 Heating Capacity Nominal 162,000 (47.5) Btu/h (kW) Rated 154,000 (45.1) 138,000 (40.4) Casing Color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 65 SiUS301716EE Specifications Model (Combination unit) RWEQ168TBYCU Model (Independent unit) RWEQ72TBYCU RWEQ96TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 162,000 (47.5) Btu/h (kW) Rated 156,000 (45.7) 2 Heating Capacity Nominal 189,000 (55.4) Btu/h (kW) Rated 156,000 (45.7) Casing Color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 66 Specifications SiUS301716EE Model (Combination unit) RWEQ192TAYCU RWEQ192TBYCU Model (Independent unit) RWEQ96TAYCU RWEQ96TBYCU RWEQ96TAYCU RWEQ96TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 192,000 (56.3) Btu/h (kW) Rated 184,000 (53.9) 2 Heating Capacity Nominal 216,000 (63.3) Btu/h (kW) Rated 206,000 (60.4)
  • Page 67 SiUS301716EE Specifications Model (Combination unit) RWEQ216TAYCU RWEQ216TBYCU Model (Independent unit) RWEQ120TAYCU RWEQ120TBYCU RWEQ96TAYCU RWEQ96TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 216,000 (63.3) Btu/h (kW) Rated 206,000 (60.4) 2 Heating Capacity Nominal 243,000 (71.2) Btu/h (kW) Rated 232,000 (68.0)
  • Page 68 Specifications SiUS301716EE Model (Combination unit) RWEQ240TAYCU RWEQ240TBYCU Model (Independent unit) RWEQ120TAYCU RWEQ120TBYCU RWEQ120TAYCU RWEQ120TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 240,000 (70.3) 238,000 (69.8) Btu/h (kW) Rated 228,000 (66.8) 2 Heating Capacity Nominal 270,000 (79.1) Btu/h (kW) Rated...
  • Page 69 SiUS301716EE Specifications Model (Combination unit) RWEQ264TAYCU RWEQ264TBYCU Model (Independent unit) RWEQ144TAYCU RWEQ144TBYCU RWEQ120TAYCU RWEQ120TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 264,000 (77.4) Btu/h (kW) Rated 252,000 (73.9) 2 Heating Capacity Nominal 297,000 (87.0) Btu/h (kW) Rated 284,000 (83.2)
  • Page 70 Specifications SiUS301716EE Model (Combination unit) RWEQ288TAYCU RWEQ288TBYCU Model (Independent unit) RWEQ144TAYCU RWEQ144TBYCU RWEQ144TAYCU RWEQ144TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 288,000 (84.4) 286,000 (83.8) Btu/h (kW) Rated 274,000 (80.3) 2 Heating Capacity Nominal 324,000 (95.0) Btu/h (kW) Rated...
  • Page 71 SiUS301716EE Specifications Model (Combination unit) RWEQ312TAYCU RWEQ312TBYCU Model (Independent unit) RWEQ120TAYCU RWEQ120TBYCU RWEQ96TAYCU RWEQ96TBYCU RWEQ96TAYCU RWEQ96TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 312,000 (91.4) Btu/h (kW) Rated 298,000 (87.3) 2 Heating Capacity Nominal 351,000 (102.9) Btu/h (kW) Rated...
  • Page 72 Specifications SiUS301716EE Model (Combination unit) RWEQ336TAYCU RWEQ336TBYCU Model (Independent unit) RWEQ120TAYCU RWEQ120TBYCU RWEQ120TAYCU RWEQ120TBYCU RWEQ96TAYCU RWEQ96TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 336,000 (98.5) Btu/h (kW) Rated 320,000 (93.8) 2 Heating Capacity Nominal 378,000 (110.8) Btu/h (kW) Rated...
  • Page 73 SiUS301716EE Specifications Model (Combination unit) RWEQ360TAYCU RWEQ360TBYCU Model (Independent unit) RWEQ120TAYCU RWEQ120TBYCU RWEQ120TAYCU RWEQ120TBYCU RWEQ120TAYCU RWEQ120TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 360,000 (105.5) 358,000 (104.9) Btu/h (kW) Rated 342,000 (100.2) 2 Heating Capacity Nominal 405,000 (118.7) Btu/h...
  • Page 74 Specifications SiUS301716EE Model (Combination unit) RWEQ384TAYCU RWEQ384TBYCU Model (Independent unit) RWEQ144TAYCU RWEQ144TBYCU RWEQ120TAYCU RWEQ120TBYCU RWEQ120TAYCU RWEQ120TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 384,000 (112.5) Btu/h (kW) Rated 366,000 (107.3) 2 Heating Capacity Nominal 432,000 (126.6) Btu/h (kW) Rated...
  • Page 75 SiUS301716EE Specifications Model (Combination unit) RWEQ408TAYCU RWEQ408TBYCU Model (Independent unit) RWEQ144TAYCU RWEQ144TBYCU RWEQ144TAYCU RWEQ144TBYCU RWEQ120TAYCU RWEQ120TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 408,000 (119.6) 406,000 (119.0) Btu/h (kW) Rated 388,000 (113.7) 2 Heating Capacity Nominal 459,000 (134.5) Btu/h...
  • Page 76 Specifications SiUS301716EE Model (Combination unit) RWEQ432TAYCU RWEQ432TBYCU Model (Independent unit) RWEQ144TAYCU RWEQ144TBYCU RWEQ144TAYCU RWEQ144TBYCU RWEQ144TAYCU RWEQ144TBYCU Power Supply 3 phase, 575 V, 60 Hz 1 Cooling Capacity Nominal 426,000 (124.8) 422,000 (123.7) Btu/h (kW) Rated 410,000 (120.2) 402,000 (117.8) 2 Heating Capacity Nominal 486,000 (142.4) Btu/h...
  • Page 77 SiUS301716EE Part 2 Refrigerant Circuit 1. Refrigerant Circuit (Piping Diagrams) ............71 1.1 Outside Unit....................71 1.2 Branch Selector Unit .................. 74 1.3 Indoor Unit....................86 1.4 Outdoor-Air Processing Unit............... 89 2. Functional Parts Layout ................90 3. Refrigerant Flow for Each Operation Mode..........92 3.1 In Case of Heat Pump Connection.............

  • Page 78: Refrigerant Circuit Part

    Refrigerant Circuit (Piping Diagrams) SiUS301716EE 1. Refrigerant Circuit (Piping Diagrams) Outside Unit No. in Electric piping Name Function symbol diagram Compressor Compressor is operated in multi-steps according to Te or Tc by COMP using inverter. Electronic expansion valve (Main) In cooling : High pressure control In heating or simultaneous cooling/heating operation : •...
  • Page 79 SiUS301716EE Refrigerant Circuit (Piping Diagrams) No. in Electric piping Name Function symbol diagram Subcooling heat exchanger outlet Used to detect gas pipe temperature on the evaporating side of (24) gas pipe thermistor subcooling heat exchanger, keeping the superheating degree at the outlet of subcooling heat exchanger constant, and others.
  • Page 80 Refrigerant Circuit (Piping Diagrams) SiUS301716EE RWEQ96/120/144TATJU, RWEQ96/120/144TATJA, RWEQ72/96/120/144TBTJA RWEQ96/120/144TAYDU, RWEQ96/120/144TAYDA, RWEQ72/96/120/144TBYDA RWEQ96/120/144TAYCU, RWEQ72/96/120/144TBYCU (17) Heat exchanger pipe (25) (13) (19) (30) (26) (20) (24) (21) (18) (17) (27) (10) (23) (11) (12) (15) SENPH (16) SENPL (14) (31) (22) (32) Charge port Stop valve C: 3D130327A...

  • Page 81: Branch Selector Unit

    SiUS301716EE Refrigerant Circuit (Piping Diagrams) Branch Selector Unit Electric Name Function Symbol Electronic expansion valve (EVSC) In simultaneous cooling and heating, it is used to subcooling liquid refrigerants when an indoor unit downstream of this Branch Selector unit is in heating. (Max : 480 pulse) Electronic expansion valve (EVH) Opens while in heating or all indoor units are in cooling.
  • Page 82 Refrigerant Circuit (Piping Diagrams) SiUS301716EE BSQ36/60/96TAVJ C: 4D133271 Part 2 Refrigerant Circuit...
  • Page 83 SiUS301716EE Refrigerant Circuit (Piping Diagrams) 1.2.2 Multi Branch Selector Unit (Standard Series) BS4Q54TVJ Electronic Expansion Valve (HP/LP gas) Electronic Expansion Valve Filter Gas pipe Double pipe heat (Subcooling) Electronic Expansion Valve (Suction) Filter connection port exchanger Liquid pipe connection port Electronic Expansion Valve (HP/LP gas) Electronic Expansion Valve...
  • Page 84 Refrigerant Circuit (Piping Diagrams) SiUS301716EE BS6Q54TVJ Electronic Expansion Valve (HP/LP gas) Electronic Expansion Valve Filter Gas pipe Double pipe heat (Subcooling) Electronic Expansion Valve (Suction) Filter exchanger connection port Liquid pipe connection port Electronic Expansion Valve (HP/LP gas) Electronic Expansion Valve Filter Gas pipe Double pipe heat...
  • Page 85 SiUS301716EE Refrigerant Circuit (Piping Diagrams) BS8Q54TVJ Electronic Expansion Valve ( HP/LP gas ) Electronic Expansion Valve Filter Double pipe heat Gas pipe ( Subcooling ) Electronic Expansion Valve ( Suction ) Filter exchanger connection port Liquid pipe connection port Electronic Expansion Valve ( HP/LP gas ) Electronic Expansion Valve Filter...
  • Page 86 Refrigerant Circuit (Piping Diagrams) SiUS301716EE BS10Q54TVJ Electronic Expansion Valve (HP/LP gas) Electronic Expansion Valve Filter Double pipe heat Gas pipe (Subcooling) Electronic Expansion Valve (Suction) Filter exchanger connection port Liquid pipe connection port Electronic Expansion Valve (HP/LP gas) Electronic Expansion Valve Filter Double pipe heat Gas pipe...
  • Page 87 SiUS301716EE Refrigerant Circuit (Piping Diagrams) BS10Q54TAVJ C: 3D133293 Part 2 Refrigerant Circuit...
  • Page 88 Refrigerant Circuit (Piping Diagrams) SiUS301716EE BS12Q54TVJ Electronic Expansion Valve (HP/LP gas) Electronic Expansion Valve Filter Double pipe heat (Subcooling) Gas pipe Electronic Expansion Valve (Suction) exchanger Filter connection port Liquid pipe connection port Electronic Electronic Expansion Valve (HP/LP gas) Expansion Valve Filter Double pipe heat Gas pipe...
  • Page 89 SiUS301716EE Refrigerant Circuit (Piping Diagrams) BS12Q54TAVJ C: 3D133294 Part 2 Refrigerant Circuit...
  • Page 90 Refrigerant Circuit (Piping Diagrams) SiUS301716EE 1.2.3 Multi Branch Selector Unit (Flex Series) BSF4Q54TVJ C: 3D122813 Part 2 Refrigerant Circuit...
  • Page 91 SiUS301716EE Refrigerant Circuit (Piping Diagrams) BSF6Q54TVJ C: 3D125655 Part 2 Refrigerant Circuit...
  • Page 92 Refrigerant Circuit (Piping Diagrams) SiUS301716EE BSF8Q54TVJ C: 3D125656 Part 2 Refrigerant Circuit...

  • Page 93: Indoor Unit

    SiUS301716EE Refrigerant Circuit (Piping Diagrams) Indoor Unit Symbol No. in Except piping Name Function FXMQ-PB FXTQ-TA FXMQ-PB diagram FXTQ-TA FXTQ-TB FXTQ-TB Electronic expansion valve Used for gas superheating degree control while in cooling or subcooling degree control while in heating. Suction air thermistor R1T (1) Used for thermostat control.
  • Page 94 Refrigerant Circuit (Piping Diagrams) SiUS301716EE  FXUQ-P, FXEQ-P, FXSQ-TA, FXMQ-M, FXAQ-P, FXLQ-M,  FXZQ-M FXNQ-M Gas piping connection port Gas piping connection port Indoor heat exchanger Indoor heat exchanger Liquid piping connection port Liquid piping connection port Filter Filter C: 4D040157B Filter Filter C: 4D034245S  FXSQ-TB, FXMQ-TB...
  • Page 95 SiUS301716EE Refrigerant Circuit (Piping Diagrams)  FXTQ-TA, FXTQ-TB  FXMQ-TA C: 3D117738B C: 4D068194 Part 2 Refrigerant Circuit...

  • Page 96: Outdoor-Air Processing Unit

    Refrigerant Circuit (Piping Diagrams) SiUS301716EE Outdoor-Air Processing Unit FXMQ48/72/96MFVJU* Gas pipe connection port Heat exchanger Filter Capillary tube Distributor Solenoid valve Liquid pipe connection port Check valve Filter Filter Electronic expansion valve C: 4D018650D No. in piping Electric symbol Name Function diagram Electronic expansion valve...

  • Page 97: Functional Parts Layout

    SiUS301716EE Functional Parts Layout 2. Functional Parts Layout Front View High pressure switch (S1PH) Solenoid valve (Hot gas) (Y5S) Discharge pipe thermistor (R12T) Electronic expansion Compressor (M1C) valve (Main) (Y1E) Subcooling heat exchanger outlet liquid Compressor body pipe thermistor (R8T) thermistor (R13T) Section A-A Low pressure...

  • Page 98: Right View

    Functional Parts Layout SiUS301716EE Right View Exhaust heat cancellation heat exchanger gas pipe thermistor (R2T) Unit inside thermistor (R1T) Solenoid valve (Exhaust heat cancellation heat exchanger) (Y9S) Subcooling heat exchanger outlet gas pipe thermistor (R5T) C: 0P452200N Part 2 Refrigerant Circuit...

  • Page 99: Refrigerant Flow For Each Operation Mode

    SiUS301716EE Refrigerant Flow for Each Operation Mode 3. Refrigerant Flow for Each Operation Mode In Case of Heat Pump Connection A. Cooling Operation Indoor Unit ON (Cooling) + Thermostat ON Indoor Unit OFF (Cooling) Indoor Unit ON (Cooling) + Thermostat OFF High temp.
  • Page 100 Refrigerant Flow for Each Operation Mode SiUS301716EE B. Heating Operation Indoor Unit ON (Heating) + Thermostat ON Indoor Unit OFF (Heating) Indoor Unit ON (Heating) + Thermostat OFF High temp. High pressure gas Heat exchanger Heat exchanger Heat exchanger High temp. High pressure liquid Low temp.

  • Page 101: Oil Return Operation

    SiUS301716EE Refrigerant Flow for Each Operation Mode C. Oil Return Operation Indoor Unit ON (Cooling) + Thermostat ON Indoor Unit OFF (Cooling) Indoor Unit ON (Cooling) + Thermostat OFF High temp. High pressure gas Heat exchanger Heat exchanger Heat exchanger High temp.

  • Page 102: In Case Of Heat Recovery Connection (Single Outside Unit Installation)

    Refrigerant Flow for Each Operation Mode SiUS301716EE In Case of Heat Recovery Connection (Single Outside Unit Installation) A. Cooling Operation Indoor Unit ON (Cooling) + Thermostat ON Indoor Unit ON (Cooling) + Thermostat OFF Indoor Unit OFF (Cooling) High temp. High pressure gas Heat exchanger Heat exchanger Heat exchanger...
  • Page 103 SiUS301716EE Refrigerant Flow for Each Operation Mode B. Heating Operation Indoor Unit ON (Heating) + Thermostat ON Indoor Unit ON (Heating) + Thermostat OFF Indoor Unit OFF (Heating) High temp. High pressure gas Heat exchanger Heat exchanger Heat exchanger High temp. High pressure liquid Low temp.
  • Page 104 Refrigerant Flow for Each Operation Mode SiUS301716EE C. Heating and Simultaneous Cooling/Heating Operation (When the outside water cooled heat exchanger is used as condenser.) Indoor Unit ON (Cooling) + Thermostat ON Indoor Unit ON (Cooling) + Thermostat ON Indoor Unit ON (Heating) + Thermostat ON High temp.
  • Page 105 SiUS301716EE Refrigerant Flow for Each Operation Mode D. Heating and Simultaneous Cooling/Heating Operation (When the outside water cooled heat exchanger is used as evaporator.) (In case there are indoor units operating with cooling thermostat “ON”.) Indoor Unit ON (Cooling) + Thermostat ON Indoor Unit ON (Heating) + Thermostat ON Indoor Unit ON (Heating) + Thermostat ON High temp.
  • Page 106 Refrigerant Flow for Each Operation Mode SiUS301716EE E. Oil Return Operation at Simultaneous Cooling/Heating Operation Indoor Unit ON (Cooling) + Thermostat ON Indoor Unit ON (Heating) + Thermostat ON Indoor Unit ON (Heating) + Thermostat OFF High temp. High pressure gas Heat exchanger Heat exchanger Heat exchanger...
  • Page 107 SiUS301716EE Part 3 Remote Controller 1. Applicable Models ...................101 2. Names and Functions ................102 2.1 BRC1E73 ....................102 2.2 BRC1H71W....................105 2.3 Wireless Remote Controller ..............113 3. Main/Sub Setting..................114 3.1 BRC1E73 ....................114 3.2 BRC1H71W....................116 3.3 When Wireless Remote Controller is Used Together....... 118 4.

  • Page 108: Applicable Models

    Applicable Models SiUS301716EE 1. Applicable Models Wired remote controller Series Wireless remote controller Navigation Madoka FXFQ-AA FXFQ-T — FXFQ-P BRC082A42W (for BYFQ60C3W1W) FXZQ-TA BRC082A42S (for BYFQ60C3W1S) BRC082A41W (for BYFQ60B3W1) BRC082A42W (for BYFQ60C3W2W) FXZQ-TB BRC082A41W (for BYFQ60B3W1) FXZQ-M BRC7E830 BRC1E73 FXUQ-P FXUQ-PA —...

  • Page 109: Names And Functions

    SiUS301716EE Names and Functions 2. Names and Functions BRC1E73 1. Operation mode selector button 11. LCD (with backlight) 4. Up button 5. Down button 6. Right button 7. Left button 9. Operation lamp 8. On/Off button 3. Menu/OK button 10. Cancel button 2.
  • Page 110 Names and Functions SiUS301716EE 4. Up button  Used to raise the setpoint.  The item above the current selection will be highlighted. (The highlighted items will be scrolled continuously when the button is continuously pressed.)  Used to change the selected item. 5.

  • Page 111: Service Check Function

    SiUS301716EE Names and Functions Service Check Function <Main Menu> Main Menu • Airflow Direction Airflow Direction • Individual Airflow Direction Individual Airflow Direction • Ventilation Ventilation • Schedule Schedule • Off Timer Off Timer • Celsius / Fahrenheit Celsius / Fahrenheit •...

  • Page 112: Brc1H71W

    Names and Functions SiUS301716EE BRC1H71W 2.2.1 Button Locations and Descriptions ON/OFF button • Press this button to turn on the system. • Press this button again to turn off the system. b Status indicator (LED) • During operation, the light ring around the display lights up blue/red/green. Lights up blue: Operating, Blinks red: Error is occurring, Lights up/blinks green: Bluetooth connecting c LCD •...

  • Page 113: Overview Of Screens

    SiUS301716EE Names and Functions 2.2.2 Overview of Screens The following is just an example. The items available for setting vary depending on the indoor unit you are using. If there is no button operation for about 10 seconds, the screen returns to the home screen.
  • Page 114 Names and Functions SiUS301716EE 2.2.3 Setting Screen List Setting list Installer User Administrator menu menu menu Icon Name Description Depends on Operation Mode Operation mode setting current setting Depends on Fan Speed Airflow rate setting current setting Depends on Airflow Direction Airflow direction 1 setting current setting Depends on...
  • Page 115 SiUS301716EE Names and Functions Setting list User Administrator Installer menu menu menu Icon Name Description Bluetooth Setting Bluetooth setting Backlight Backlight brightness setting Contrast Contrast setting Clock Setting Clock setting Scale reference temperature Standard Temp setting About Administrator information Administrator password Admin Password setting Installer Password...
  • Page 116 Bluetooth SIG, Inc. and use of such marks by r Settings menu name Daikin industries, LTD. is under license. Other trademarks and trade names are those of their respective owners. s Settings menu icon INFORMATION Depending on the connected model, some items may not be displayed.
  • Page 117 SiUS301716EE Names and Functions Home screen list There are 4 types of home screen. The home screen type can be changed by the remote controller setting. Text mode Icon mode Auto Cool ˚F Room Text mode (Scale screen) Icon mode (Scale screen) Auto Cool Cool Warm...

  • Page 118: Information Screen

    Names and Functions SiUS301716EE 2.2.5 Information Screen The functions of the connected indoor unit are displayed as icons. How to display the information screen Home screen Press and hold on the Home screen for 5 Auto Cool ˚F seconds. Room Text mode Icon mode Information screen...
  • Page 119 * The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and use of such marks by Daikin industries, LTD. is under license. Other trademarks and trade names are those of their respective owners.

  • Page 120: Wireless Remote Controller

    Names and Functions SiUS301716EE Wireless Remote Controller ON OFF DOWN ON OFF TEMP TIME DOWN RESERVE CANCEL TIMER TEST MODE SWING TEST TEST DISPLAY (SIGNAL TRANSMISSION) FAN SPEED CONTROL BUTTON Press this button to select the fan speed, HIGH or This lights up when a signal is being transmitted.

  • Page 121: Main/Sub Setting

    SiUS301716EE Main/Sub Setting 3. Main/Sub Setting BRC1E73 Situation The Main/Sub setting is necessary when 1 indoor unit is controlled by 2 remote controllers. When you use 2 remote controllers (control panel and separate remote controller), set one to Main and the other to Sub.
  • Page 122 Main/Sub Setting SiUS301716EE 3.1.2 When an Error Occurred U5: there are 2 main remote controllers when power is turned ON Change the setting from Main to Sub on the remote controller you want to be Sub. U8: there are 2 sub remote controllers when power is turned ON Change the setting from Sub to Main on the remote controller you want to be Main.

  • Page 123: Brc1H71W

    SiUS301716EE Main/Sub Setting BRC1H71W 3.2.1 Main and Sub Controller a Outdoor unit b Indoor unit c Main remote controller d Sub remote controller • On the information screen, main/sub status is indicated by the following icons: Icon Description Main INFORMATION It is only possible to use a main and a sub controller of the same type.
  • Page 124 Main/Sub Setting SiUS301716EE 3.2.2 Designating a Controller as Main or Sub Prerequisite: A remote controller is already connected to the indoor unit. Connect a second controller. After turning on the power, perform setting of the second controller. Result: It will start up automatically. Home screen Wait for a U5 or U8 error code to appear on the screen.

  • Page 125: When Wireless Remote Controller Is Used Together

    SiUS301716EE Main/Sub Setting When Wireless Remote Controller is Used Together When using both a wired and a wireless remote controller for 1 indoor unit, the wired controller should be set to Main. Therefore, the Main/Sub switch (SS1) of the signal receiver PCB must be set to Sub.

  • Page 126: Address Setting For Wireless Remote Controller

    Address Setting for Wireless Remote Controller SiUS301716EE 4. Address Setting for Wireless Remote Controller If setting multiple wireless remote controllers to operate in one room, perform address setting for the receiver and the wireless remote controller. (This includes an individual remote controller control using the group operation.) (For the wiring for the group operation, please refer to the installation manual attached to the indoor unit.) Setting for signal receiver PCB...
  • Page 127 SiUS301716EE Address Setting for Wireless Remote Controller 5. Press INSPECTION/TEST button for 1 second to return to normal mode. UP button DOWN button Field setting mode FAN button RESERVE button Address Multiple setting FILTER SIGN RESET button INSPECTION/TEST button Multiple Settings A/b The command such as operation mode or temperature setting by this remote controller will be rejected when the target indoor unit operation is restricted as by an external control such as centralized control.

  • Page 128: Centralized Control Group No. Setting

    Centralized Control Group No. Setting SiUS301716EE 5. Centralized Control Group No. Setting BRC1E73 In order to conduct the centralized remote control using the central remote controller and the unified ON/OFF controller, Group No. settings should be made by group using the operating remote controller.
  • Page 129 SiUS301716EE Centralized Control Group No. Setting Note(s)  For setting group No. of Energy recovery ventilator and wiring adaptor for other air conditioners, etc., refer to the instruction manual. NOTICE Enter the group No. and installation place of the indoor unit into the installation table. Be sure to keep the installation table with the operation manual for maintenance.

  • Page 130: Brc1H71W

    Centralized Control Group No. Setting SiUS301716EE BRC1H71W Group Address • Assign the group address and unit number for centralized control. • The group and unit address can only be set when a centralized controller is connected. This menu is only visible when a centralized controller is connected. •...

  • Page 131: Group No. Setting Example

    SiUS301716EE Centralized Control Group No. Setting 5. Press INSPECTION/TEST button and return to the normal mode. UP button Mode No. Field setting mode DOWN button RESERVE button MODE button Group No. INSPECTION/TEST button Group No. Setting Example Central Remote Controller Indoor/Outside Outside/Outside Indoor/Outside Outside/Outside F1 F2...

  • Page 132: Service Settings Menu, Maintenance Menu

    Service Settings Menu, Maintenance Menu SiUS301716EE 6. Service Settings Menu, Maintenance Menu BRC1E73 Operating the remote controller allows service data to be acquired and various services to be set. Basic screen is displayed. Press and hold the Press the Cancel Cancel button button once.

  • Page 133: Service Settings Menu

    SiUS301716EE Service Settings Menu, Maintenance Menu 6.1.1 Service Settings Menu Service settings menu Item 2 Remarks Test Operation — — Maintenance Contact None — Maintenance Contact —, 0 to 9 (in order) Field Settings Indoor Unit No. — Mode No. —...

  • Page 134: Maintenance Menu

    Service Settings Menu, Maintenance Menu SiUS301716EE 6.1.2 Maintenance Menu Maintenance Menu Item 2 Remarks Model Name Unit No. Select the unit number you want to check. Indoor unit The model names are displayed. (A model code may be displayed instead, depending Outdoor unit on the particular model.) Operation Hours...
  • Page 135 SiUS301716EE Service Settings Menu, Maintenance Menu Maintenance Menu Item 2 Remarks Error Display Display error ON Displays the error on the screen. Display error OFF Displays neither errors nor warnings. Display warning ON Displays a warning on the screen if an error occurs. Display warning OFF No warning is displayed.

  • Page 136: Administrator Menu, Installer Menu

    Administrator Menu, Installer Menu SiUS301716EE 7. Administrator Menu, Installer Menu BRC1H71W Refer to page 107 for details. Part 3 Remote Controller...
  • Page 137 SiUS301716EE Part 4 Functions and Control 1. Function General..................132 1.1 Operation Mode..................132 1.2 Normal Operation ..................133 2. Stop Control ....................134 2.1 When System is in Stop Control............... 134 2.2 Stop Control of Slave Units While Master Unit is in Operation on Multi Outside Unit System.................
  • Page 138 SiUS301716EE 9. Outline of Control (Indoor Unit) ...............174 9.1 Operation Flowchart ................. 174 9.2 Set Temperature and Control Target Temperature........178 9.3 Remote Controller Thermistor ..............180 9.4 Thermostat Control................... 182 9.5 Drain Pump Control.................. 185 9.6 Control of Electronic Expansion Valve ............. 187 9.7 Freeze-Up Prevention Control..............

  • Page 139: Function General

    SiUS301716EE Function General 1. Function General Operation Mode System stopping function • Restart standby Thermostat ON • Crankcase heater control Startup control • Cooling startup control • Heating startup control • Pump down residual operation • Pressure equalization startup control •...

  • Page 140: Normal Operation

    Function General SiUS301716EE Normal Operation Actuator Function Electric Parts Name Normal heating or normal cooling/ Symbol Normal cooling heating simultaneous operation Compressor PI control, High pressure protection, Low PI control, High pressure protection, Low pressure protection, Discharge pipe pressure protection, Discharge pipe temperature protection, Inverter temperature protection, Inverter protection control.

  • Page 141: Stop Control

    SiUS301716EE Stop Control 2. Stop Control This operation defines the operation of the actuator while the system stops. When System is in Stop Control Electric Parts Name Actuator Function Symbol Compressor Fan motor (Electrical component cooling) Inverter cooling fan control, Exhaust heat M1F, M2F, cancellation heat exchanger control, Protection control...

  • Page 142: Stop Control Of Slave Units While Master Unit Is In Operation On Multi Outside Unit System

    Stop Control SiUS301716EE Stop Control of Slave Units While Master Unit is in Operation on Multi Outside Unit System This operation makes adjustments of required refrigerant amount with non-operating slave units while the master unit is in operation. The system operates in mode A or mode B listed in the table below. Parts Name Electric Symbol Mode A Operation (1)

  • Page 143: Abnormal Stop

    SiUS301716EE Stop Control Abnormal Stop In order to protect compressors, if any of the following items has an abnormal value, the system will stop with thermostat OFF and the error will be determined according to the number of retry times. Item Judgment Value Retry Number...

  • Page 144: Standby Control

    Standby Control SiUS301716EE 3. Standby Control Restart Standby Forced standby is performed to prevent frequent repetition of ON/OFF of the compressor, and to equalize pressure in the refrigerant system. Parts Name Electric Symbol Actuator Function Compressor 0 rps Fan motor (Electrical component cooling) Inverter cooling fan control, Exhaust heat M1F, M2F, M3F cancellation heat exchanger control,...

  • Page 145: Startup Control

    SiUS301716EE Startup Control 4. Startup Control This control is used to equalize the pressure in the suction and discharge sides of the compressor prior to the startup of the compressor, thus reducing startup loads. Furthermore, the inverter is turned ON to charge the capacitor. To avoid stresses to the compressor due to oil return or else after the startup, the following control is made and the position of the four way valve is also determined.

  • Page 146: Normal Control

    Normal Control SiUS301716EE 5. Normal Control Compressor PI Control In order to provide a steady capacity, the compressor capacity is controlled to achieve temperature Te/Tc during cooling/heating operation. 5.1.1 VRTsmart Control  When all the connected indoor units are VRTsmart control applicable models The required capacity is calculated based on the operation condition of each individual indoor unit and this data is transmitted to the outside unit.

  • Page 147: Cooling Operation

    SiUS301716EE Normal Control 5.1.3 Cooling Operation Te setting 2-81: Cooling comfort setting 9˚C + C (48.2˚F + C) Position Mode MILD Quick Powerful Te: Low pressure equivalent saturation temperature A (˚C) Th1 : Indoor unit inlet air temperature B (˚F) Tr : Remote controller set temperature C: Comfort setting Te control Start...

  • Page 148: Heating Operation

    Normal Control SiUS301716EE 5.1.4 Heating Operation Tc setting 2-82: Heating comfort setting 42˚C + H (107.6˚F + H) Position Mode MILD Quick Powerful Tc: High pressure equivalent saturation temperature A (˚C) H : Comfort setting Tc control B (˚F) Start ↓...

  • Page 149: Injection Control

    SiUS301716EE Normal Control 5.1.6 Injection Control • INV > 70 rps • HDSHi  25°C • Heating • PL = Saturated pressure {max(R6T (TL), • Outside unit has no evaporator R8T (Tsc)) – A} • PL > Pe × 1.3 – 0.1 MPa (14 psi) for 2 minutes &...

  • Page 150: Compressor Operation Frequency Steps

    Normal Control SiUS301716EE Compressor Operation Frequency Steps Single outside unit installation Step Step Step 15.0 32.8 67.7 15.2 33.3 68.6 15.4 33.8 69.6 15.6 34.2 70.6 15.9 34.7 71.6 16.2 35.2 72.6 16.5 35.7 73.6 16.8 36.2 74.6 17.1 36.7 75.7 17.4 37.2...
  • Page 151 SiUS301716EE Normal Control Double outside units connection installation A : 1-Compressor operation Step Step Step 72/96 class upper limit B : 2-Compressor operation 28.1 39.9 111.7 29.0 41.0 114.8 Step m Startup 29.8 15.0 42.2 118.0 30.2 15.2 42.8 119.7 30.6 15.4 43.4...
  • Page 152 Normal Control SiUS301716EE Triple outside units connection installation B : 2-Compressor operation C : 3-Compressor operation Step Step Step Step Step m Startup 120 15.0 15.0 15.0 31.9 65.8 15.2 15.2 15.2 32.4 66.8 15.4 15.4 15.4 32.8 67.7 15.6 15.6 15.6 33.3...

  • Page 153: Electronic Expansion Valve Control

    SiUS301716EE Normal Control Electronic Expansion Valve Control Main Electronic Expansion valve (EVM) Control When the outside unit heat exchanging is performed via condenser (Y7S (20S2) is set to OFF), this function is used to exert PI control on the electronic expansion valve (Y1E) so that the condenser outlet subcooling degree (SC) will become constant.

  • Page 154: Heat Exchange Mode In Heating Operation Or Simultaneous Cooling/Heating Operation

    Normal Control SiUS301716EE Heat Exchange Mode in Heating Operation or Simultaneous Cooling/Heating Operation In heating or simultaneous cooling/heating operation, a target condensing and evaporating temperature can be secured by switching the water heat exchanger of the outside unit into evaporator or condenser with load. Single outside unit installation Master unit Four way valve for heat exchanger (Y7S)
  • Page 155 SiUS301716EE Normal Control Triple outside units installation Master unit Slave unit 1 Slave unit 2 Four way valve for heat exchanger (Y7S) (Condenser) (Condenser) (Condenser) (For the application of heat exchanger) Content of the control of electronic expansion valve Control of heat exchange Control of heat exchange Control of heat exchange (Y1E)
  • Page 156 Normal Control SiUS301716EE Note(s) Tc: High pressure equivalent saturation temperature Te: Low pressure equivalent saturation temperature GR = Target of heat exchange capacity balance – Actual measurement of heat balance (1) GR > 0: Insufficient evaporation (Excessive condensation) (2) GR < 0: Insufficient condensation (Excessive evaporation) Control of heat exchange capacity balance Control the electronic expansion valve so that Te or Tc will obtain the target value.

  • Page 157: Protection Control

    SiUS301716EE Protection Control 6. Protection Control High Pressure Protection Control This high pressure protection control is used to prevent the activation of protection devices due to abnormal increase of high pressure and to protect compressors against the transient increase of high pressure.
  • Page 158 Protection Control SiUS301716EE EVG (Y3E) SVP (Y5S) Normal operation Normal operation • Pc > 3.33 MPa • Pc > 3.59 MPa • Pc < 2.99 MPa • Pc < 3.39 MPa (484 psi) (521 psi) (434 psi) (492 psi) 279 pulse EVT (Y2E) Normal operation •...
  • Page 159 SiUS301716EE Protection Control In heating or simultaneous cooling/heating Pc: High pressure sensor detection value for each outside unit Tsh: Suction pipe temperature detected with the thermistor (R5T) Te: Low pressure equivalent saturation temperature • Pc (Predicted value) Compressor Normal operation Time •...

  • Page 160: Low Pressure Protection Control

    Protection Control SiUS301716EE Low Pressure Protection Control This low pressure protection control is used to protect compressors against the transient decrease of low pressure. In cooling Pe: Value detected by low pressure sensor for master unit Compressor Normal operation • Pe > 0.49 MPa •...
  • Page 161 SiUS301716EE Protection Control In heating or simultaneous cooling/heating (When the outside unit heat exchanger is used as evaporator.) Pc: High pressure sensor detection value for each outside unit Pe: Value detected by low pressure sensor for each outside unit Te: Low pressure equivalent saturation temperature Compressor Master unit : 20S2 (Y7S) = ON Normal operation...
  • Page 162 Protection Control SiUS301716EE „Master unit : 20S2 (Y7S) = OFF Normal operation • Te min > –9.1°– D • Te min < –11.7° – D & (15.6°F – D) (10.9°F – D) • Compressor upper limit ≥ PI compressor step Frequency control 9-step down •...

  • Page 163: Discharge Pipe Protection Control

    SiUS301716EE Protection Control Discharge Pipe Protection Control This discharge pipe protection control protects the compressor internal temperature against an error or transient increase of discharge pipe temperature. Discharge pipe protection control is carried out in each outside unit. Compressor HTdi: Value of compressor discharge pipe temperature compensated with outdoor air temperature Normal operation •...

  • Page 164: Suction Pipe Protection Control

    Protection Control SiUS301716EE Suction Pipe Protection Control This suction pipe protection control protects the fusible plug and compressor internal temperature for the accumulator against hot gas due to a switching error of the 4-way valves. Suction pipe protection control is carried out in each outside unit. Ts: Suction pipe temperature detected by thermistor (R3T) Normal operation •...

  • Page 165: Inverter Protection Control

    SiUS301716EE Protection Control Inverter Protection Control Inverter current protection control and radiation fin temperature control are performed to prevent tripping due to an error, or transient inverter overcurrent, and radiation fin temperature increase. This control is carried out in each outside unit. Inverter overcurrent protection control Normal operation •...
  • Page 166 Protection Control SiUS301716EE Radiation fin temperature control Tfin: Radiation fin temperature Normal operation • Tfin < C – 3°C • Tfin ≥ C & (5.4°F) • Compressor upper limit = MAX step Frequency control 3-step down • Tfin ≥ C for 15 seconds •...

  • Page 167: Cooling Fan Control

    SiUS301716EE Protection Control Cooling Fan Control This function is used for ON/OFF control of the cooling fan to cool the inverter and to cool within outside unit for exhaust heat cancellation. This cooling fan operates only when the temperature of the inverter or inside of outside unit is high, in order to reduce the operating time of the fan.

  • Page 168: Special Control

    Special Control SiUS301716EE 7. Special Control Oil Return Control In order to prevent the running-out of refrigerating oil in the compressor, the oil return operation is conducted to recover oil flown out from the compressor to the system side. 7.1.1 Oil Return Control in Cooling Tc: High pressure equivalent saturation temperature Te: Low pressure equivalent saturation temperature Starting conditions...
  • Page 169 SiUS301716EE Special Control Indoor unit actuator Oil return control 2-41 Thermostat ON unit Remote controller setting — Non-operating unit — Remote controller setting 0 (Default) Thermostat OFF unit Electronic expansion valve Thermostat ON unit Normal control — Non-operating unit 192 pulse  SH control —...
  • Page 170 Special Control SiUS301716EE 7.1.2 Oil Return Control in Heating or Cooling/Heating Simultaneous Operation Tc: High pressure equivalent saturation temperature Te: Low pressure equivalent saturation temperature Starting conditions  Oil return operation is not conducted before 2 hours have elapsed from the activation of power supply.
  • Page 171 SiUS301716EE Special Control Indoor unit actuator Cooling Heating Thermostat ON unit Remote controller setting Remote controller setting  OFF Non-operating unit Remote controller setting  OFF Remote controller setting  OFF Thermostat OFF unit Remote controller setting Remote controller setting  OFF Electronic expansion valve Thermostat ON unit 0 pulse ...

  • Page 172: Oil Return Control Of Water Heat Exchanger

    Special Control SiUS301716EE Oil Return Control of Water Heat Exchanger Oil return control of water heat exchanger When the water heat exchanger is used as evaporator during heating or simultaneous cooling/heating operation, the operation that the oil accumulated in the water heat exchanger is returned to compressor is conducted.
  • Page 173 SiUS301716EE Special Control 7.3.1 Cooling Operation Mode Electric Symbol Parts Name Master Unit Operation Slave Unit Operation Compressor COMP 15 rps  Pressure control 0 rps Electronic expansion valve (Main) 3,000 pulse 0 pulse Electronic expansion valve (Subcool) 0 pulse 0 pulse Electronic expansion valve 320 pulse ...

  • Page 174: Refrigerant Drift Prevention

    Special Control SiUS301716EE Refrigerant Drift Prevention Refrigerant drift prevention control is carried out in order to prevent refrigerant drift among outside units during heating operation using outside multiple connection. Refrigerant overcharged in outside units is collected and transferred to other outside units that present refrigerant shortage by controlling the electronic expansion valve.

  • Page 175: Other Control

    SiUS301716EE Other Control 8. Other Control Outside Unit Rotation In the case of multi outside unit system, this outside unit rotation prevents the compressor from burning out due to unbalanced oil level between outside units. Details of outside unit rotation In the case of multi outside unit system, each outside unit is given an operating priority for the control.

  • Page 176: Exhaust Heat Cancellation Operation

    Other Control SiUS301716EE Exhaust Heat Cancellation Operation Cooling the exhaust heat by heat exchanger inside the unit to maintain the set temperature and exhaust heat cancellation operation reduce machine room temperature rise caused by equipment operation. (Factory setting is OFF. The heat exhaust cancellation operation temperature can be changed in the field setting.) Outside unit inside temperature detected with the thermistor (R1T) High pressure equivalent saturation temperature...

  • Page 177: Water Quantity Control

    SiUS301716EE Other Control Water Quantity Control Water quantity is controlled to be the required amount of water. There are two cases: (1) every unit performs individually; or (2) all units perform as a whole system. (1) every unit performs individually (2) all units perform as a whole system Field setting 2-24 : 2 Field setting 2-24 : 1,3...
  • Page 178 Other Control SiUS301716EE Stop Water Volume : 0% • LV : 1 or 2 • LV : 0 & • All compressors OFF Operating Initial % • LV : 0 or 1 • LV : 2 • Oil return operation •...
  • Page 179 SiUS301716EE Other Control In case each unit performs individually (Field setting 2-24 = 1, 3) A1 : • 5 minutes • High pressure protection control & • 20S2 (Y7S) : OFF • EVM (Y1E) > 0 pulse • Low pressure protection control •...

  • Page 180: Backup Operation

    Other Control SiUS301716EE Backup Operation If any of the compressors goes wrong, disable the relevant compressor or the relevant outside unit from operating, and then conduct emergency operation only with operational compressors or outside units. "Emergency operation with remote controller reset" and "Emergency operation with outside unit PCB setting"...

  • Page 181: Outline Of Control (Indoor Unit)

    SiUS301716EE Outline of Control (Indoor Unit) 9. Outline of Control (Indoor Unit) Operation Flowchart Cooling Operation Start (Option) Turn ON Aux. electric : OFF power supply heater Humidifier : OFF Initialize electronic expansion valve Swing flap Detect louver lock prevention condition? The previous settings of airflow LED in remote rate, wind direction, and...
  • Page 182 Outline of Control (Indoor Unit) SiUS301716EE ∗10 Program dry operation Fan Operation Program ∗8 Drain dry display : OFF pump kit (Option) ∗9 Aux. ∗4 : OFF electric heater Thermostat status (Option) Humidifier : OFF : Operating in L mode after it stops for 6 min. Operating in L mode Electronic YE :...
  • Page 183 SiUS301716EE Outline of Control (Indoor Unit) Heating Operation Drain : OFF pump kit Swing flap? Set wind direction Swing flap Is test operation in progress? defrost operation in progress? Is hot starting in progress? Remote controller does Remote controller displays STANDBY not display STANDBY Restart prevention...
  • Page 184 Outline of Control (Indoor Unit) SiUS301716EE Set temperature a = b = 1°C (1.8°F) or 0.5°C (0.9°F) The values a and b depend on the field setting 12(22)-2. 7. The following models have the drain pump as standard equipment. FXFQ-AA, FXFQ-T, FXFQ-P, FXZQ-TA, FXZQ-TB, FXZQ-M, FXUQ-P, FXUQ-PA, FXEQ-P, FXDQ-M, FXSQ-TA, FXSQ-TB, FXMQ-PB, FXMQ-TB 8.

  • Page 185: Set Temperature And Control Target Temperature

    SiUS301716EE Outline of Control (Indoor Unit) Set Temperature and Control Target Temperature 9.2.1 Without Infrared Floor Sensor The relationship between remote controller set temperature and control target temperature is described below.  When the suction air thermistor is used for controlling (Default), the control target temperature is determined as follows to prevent insufficient heating in heating operation.
  • Page 186 Outline of Control (Indoor Unit) SiUS301716EE 9.2.2 With Infrared Floor Sensor The relationship between remote controller set temperature and control target temperature is described below.  The temperature difference for cooling  heating mode switching is 5°C (9°F).  When using the floor temperature as the control target, the remote controller set temperature is equal to the actual control target temperature in heating operation.

  • Page 187: Remote Controller Thermistor

    SiUS301716EE Outline of Control (Indoor Unit) Remote Controller Thermistor Temperature is controlled by both the remote controller thermistor and suction air thermistor for the indoor unit. (This is however limited to when the field setting for the remote controller thermistor is set to Use.) Note(s) When fresh air intake kit is used, outdoor air is mixed with indoor air, and the room temperature...
  • Page 188 Outline of Control (Indoor Unit) SiUS301716EE  Assuming suction temperature has changed from 30°C (86°F) to 18°C (64°F) (F A): Suction air thermistor is used for temperatures from 30C (86F) to 25C (77F) (F  D). Remote controller thermistor is used for temperatures from 25C (77F) to 21C (70F) (D B). Suction air thermistor is used for temperatures from 21C (70F) to 18C (64F) (B...

  • Page 189: Thermostat Control

    SiUS301716EE Outline of Control (Indoor Unit) Thermostat Control The thermostat ON/OFF differential value (factory setting) differs depending on the models. Differential value Model FXFQ-T, FXFQ-P, FXZQ-TA, FXZQ-M, FXUQ-P, FXEQ-P, FXSQ-TA, FXHQ-M, 1°C (1.8°F) FXTQ-TA, FXTQ-TB FXFQ-AA, FXZQ-TB, FXUQ-PA, FXDQ-M, FXSQ-TB, FXMQ-PB, FXMQ-TB, 0.5°C (0.9°F) FXMQ-TA, FXMQ-M, FXAQ-P, FXLQ-M, FXNQ-M, FXMQ-MF 9.4.1 Without Infrared Floor Sensor...
  • Page 190 Outline of Control (Indoor Unit) SiUS301716EE 9.4.2 With Infrared Floor Sensor Whether the thermostat is turned on or off is determined by the difference between the remote controller set temperature and the detected temperature around people. Normal operation  Cooling operation ΔT ≤...

  • Page 191: Thermostat Control With Operation Mode Set To Auto

    SiUS301716EE Outline of Control (Indoor Unit) 9.4.3 Thermostat Control with Operation Mode Set to AUTO The system will conduct this temperature control shown below, only when the wireless remote controller or any central remote controller is connected. Furthermore, setting changes of the differential value (D) can be made. : Factory setting Second code No.

  • Page 192: Drain Pump Control

    Outline of Control (Indoor Unit) SiUS301716EE Drain Pump Control 9.5.1 Normal Operation Float switch Thermostat (running) Error display Drain pump 5 min.  The float switch is ON in normal operation.  When cooling operation starts (thermostat ON), the drain pump turns ON simultaneously. ...
  • Page 193 SiUS301716EE Outline of Control (Indoor Unit) 9.5.3 If the Float Switch is OFF with the Thermostat OFF in Cooling Operation Float switch Thermostat (running) Error display Drain pump 5 min. 5 sec.  When the float switch turns OFF, the drain pump turns ON simultaneously. ...

  • Page 194: Control Of Electronic Expansion Valve

    Outline of Control (Indoor Unit) SiUS301716EE Control of Electronic Expansion Valve Electronic expansion valves in indoor units have the functions of conducting superheating degree control in cooling operation and subcooling degree control in heating operation. However, if the indoor units receive any control command such as a protection control command or a special control command from the outside unit, the units will give a priority to the control command.

  • Page 195: Freeze-Up Prevention Control

    SiUS301716EE Outline of Control (Indoor Unit) Freeze-Up Prevention Control Freeze-Up Prevention by Off Cycle (Indoor Unit) When the temperature detected by the liquid pipe temperature thermistor of the indoor heat exchanger drops too low, the unit enters freeze-up prevention control in accordance with the following conditions, and is also set in accordance with the conditions given below.
  • Page 196 Outline of Control (Indoor Unit) SiUS301716EE Note(s) When the indoor unit is FXFQ-AA, FXFQ-T, FXFQ-P, FXZQ-TA, FXZQ-TB, FXZQ-M, FXUQ-P, or FXUQ-PA, if the air outlet is set as dual-directional or tri-directional, the starting conditions will be changed as follows. Liquid pipe temperature ≤ 1°C (33.8°F) (for total of 15 minutes) Liquid pipe temperature ≤...

  • Page 197: List Of Swing Flap Operations

    SiUS301716EE Outline of Control (Indoor Unit) List of Swing Flap Operations Swing flaps operate as shown in table below. Flap FXZQ-TA FXFQ-AA FXZQ-TB FXFQ-T FXEQ-P FXHQ-M FXUQ-P FXFQ-P FXUQ-PA FXAQ-P Hot start from defrost Swing Horizontal Horizontal Horizontal Horizontal operation Airflow direction set Horizontal Horizontal...

  • Page 198: Hot Start Control (In Heating Operation Only)

    Outline of Control (Indoor Unit) SiUS301716EE Hot Start Control (In Heating Operation Only) At startup with thermostat ON or after the completion of defrosting in heating operation, the indoor fan is controlled to prevent cold air from blasting out and ensure startup capacity. TH2: Temperature detected with the gas thermistor Tc: High pressure equivalent saturated temperature Starting condition...

  • Page 199: Louver Control For Preventing Ceiling Dirt

    SiUS301716EE Outline of Control (Indoor Unit) 9.10 Louver Control for Preventing Ceiling Dirt We have added a control feature that allows you to select the range of in which air direction can be adjusted in order to prevent the ceiling surrounding the air discharge outlet of ceiling mounted cassette type units from being soiled.

  • Page 200: Heater Control (Except Fxtq-Ta, Fxtq-Tb Models)

    Outline of Control (Indoor Unit) SiUS301716EE 9.11 Heater Control (Except FXTQ-TA, FXTQ-TB Models) Note(s) Optional PCB KRP1B... is required. The heater control is conducted in the following manner. Normal control While in heating, the heater control (ON/OFF) is conducted as shown on the right. Set temperature 2˚C 2˚C...

  • Page 201: Heater Control (Fxtq-Ta, Fxtq-Tb Models)

    SiUS301716EE Outline of Control (Indoor Unit) 9.12 Heater Control (FXTQ-TA, FXTQ-TB Models) Note(s) Optional heater kit HKS... is required. For FXTQ-TA and FXTQ-TB models, heater ON/OFF output from wiring adaptor interlocks with the operation of heater kit HKS…(When the heater 1 turns ON/OFF, heater output of wiring adaptor turns ON/OFF.).
  • Page 202 Outline of Control (Indoor Unit) SiUS301716EE Condition A • No fan motor system error • High pressure condition: ON (∗1) • Liquid pipe temperature condition: ON (∗2) • Heater ON permission (Defrost/oil Return): 0 (∗4) & & • Not during defrost/oil return •...
  • Page 203 SiUS301716EE Outline of Control (Indoor Unit) 9.12.2 Heat Pump Lockout Control For heating operation, users can select to use electric heater. For this, signals are sent using ABC terminal of outside unit PCB. When the hot-water heating signal is received from the outside unit PCB, heating operation is performed only with the electric heater as manual backup operation.

  • Page 204: 3-Step Thermostat Processing (Fxtq-Ta, Fxtq-Tb Models)

    Outline of Control (Indoor Unit) SiUS301716EE 9.13 3-Step Thermostat Processing (FXTQ-TA, FXTQ-TB Models) Outline The thermostat ON/OFF for the indoor unit is controlled in accordance with Thermostat step 1. The heater ON/OFF operation during heating is controlled as follows. Thermostat step 2, 3: Auxiliary electric heater control Thermostat step 1, 2: Heat pump lockout control For more details of the heater, refer to Heater Control (FXTQ-TA, FXTQ-TB Models) on page 194.

  • Page 205: Fan Control (Heater Residual) (Fxtq-Ta, Fxtq-Tb Models)

    SiUS301716EE Outline of Control (Indoor Unit) 9.14 Fan Control (Heater Residual) (FXTQ-TA, FXTQ-TB Models) Outline If the indoor heater turned OFF from ON during heating operation, the fan will keep operating for further period of time in order to cool the heater. Detail Residual ON •...
  • Page 206 Outline of Control (Indoor Unit) SiUS301716EE 9.15.3 Economizer When indoor and outdoor air temperatures are reversed, the compressor is stopped to let in the outdoor air to save energy. This operation is called economizer operation, and the equipment to detect indoor and outdoor air temperatures and open and close the damper to perform this operation is called an economizer.
  • Page 207 SiUS301716EE Part 5 Field Settings and Test Operation 1. Field Settings with Remote Controller.............201 1.1 Wired Remote Controller................201 1.2 Wireless Remote Controller ..............206 1.3 Simplified Remote Controller..............207 1.4 List of Field Settings for Indoor Unit ............208 1.5 Applicable Field Settings ................

  • Page 208: Field Settings With Remote Controller

    Field Settings with Remote Controller SiUS301716EE 1. Field Settings with Remote Controller Individual function of indoor unit can be changed from the remote controller. At the time of installation or after service inspection / repair, make the field setting in accordance with the following description.
  • Page 209 SiUS301716EE Field Settings with Remote Controller Press Menu/OK button. Setting confirmation screen is displayed. <Setting confirmation screen> Select Yes and press Menu/OK button. Setting details are determined and field settings screen returns. In the case of multiple setting changes, repea t (3) to (7). After all setting changes are Press Menu/OK button.
  • Page 210 Field Settings with Remote Controller SiUS301716EE 1.1.2 BRC1H71W Enter the Installer Menu and make settings. Installer menu screen Press button, for move to “ ”. Field Setting If Bluetooth is connected, performing field setting from the remote controller side is impossible.
  • Page 211 SiUS301716EE Field Settings with Remote Controller Sub-menu screen Press button, scroll to the desired Unit Mode 20 Mode 20 No. and then press button to set the Unit 00 Unit 00 selection. Enter Return Text mode Icon mode Sub-menu screen Press button, to select “Enter”...
  • Page 212 Field Settings with Remote Controller SiUS301716EE Sub-menu screen Press button, to scroll to the desired SW 00 SW 00 Second Code No., and then press button. – 01 – 01 Cancel Text mode Icon mode Sub-menu screen Press button, select “Set” or “ ”, and SW 00 SW 00...

  • Page 213: Wireless Remote Controller

    SiUS301716EE Field Settings with Remote Controller Wireless Remote Controller UP button Mode No. Field setting mode DOWN button RESERVE button First code No. MODE button Second code No. INSPECTION/TEST button To set the field settings, you have to change:  Mode No. ...

  • Page 214: Simplified Remote Controller

    Field Settings with Remote Controller SiUS301716EE Simplified Remote Controller Mode No. First code Unit No. Second code No. (2)(8) (7) 1. Remove the upper part of remote controller. 2. When in the normal mode, press the BS6 button (2) (field setting) to enter the field setting mode.

  • Page 215: List Of Field Settings For Indoor Unit

    SiUS301716EE Field Settings with Remote Controller List of Field Settings for Indoor Unit : Factory setting Mode First Second Code No. Reference Code Setting Contents Page (Note 2) Approx. Filter cleaning Ultra long life Approx. sign interval filter 10,000 5,000 hrs. hrs....
  • Page 216 Field Settings with Remote Controller SiUS301716EE Mode First Second Code No. Reference Code Setting Contents Page (Note 2) Ceiling height setting, setting of Standard High ceiling 1 High ceiling 2 — normal airflow Airflow direction setting 4-direction 3-direction 2-direction — airflow...

  • Page 217: Applicable Field Settings

    SiUS301716EE Field Settings with Remote Controller Applicable Field Settings First Field Code Setting Modes setting Filter cleaning sign interval Filter sign setting — — — — — — — — — Filter type — — Filter cleaning sign interval — —...
  • Page 218 Field Settings with Remote Controller SiUS301716EE First Field Code Setting Modes setting Optional kit setting (UV lamp — — — — — — — — — + Humidifier + Economizer) 14 (24) Dry mode set temperature — — — — —...
  • Page 219 SiUS301716EE Field Settings with Remote Controller First Field Code Setting Modes setting Filter cleaning sign interval — Filter sign setting — — — — — — — — Filter type — — — — — — Filter cleaning sign interval —...
  • Page 220 Field Settings with Remote Controller SiUS301716EE First Field Code Setting Modes setting Optional kit setting (UV lamp — — — — — — — — + Humidifier + Economizer) 14 (24) Dry mode set temperature — — — — — —...

  • Page 221: Details Of Field Settings For Indoor Unit

    SiUS301716EE Field Settings with Remote Controller Details of Field Settings for Indoor Unit 1.6.1 Filter Cleaning Sign Interval, Filter Type : Factory setting 10 (20)-1 01: Long life filter 02: Ultra long life filter Setting Filter contamination heavy/light Light Heavy Light Heavy 01...
  • Page 222 Field Settings with Remote Controller SiUS301716EE FXTQ-TA, FXTQ-TB : Factory setting Mode No. First Code No. Second Code No. Contents — 10 (20) Remote sensor thermistor only 03 Remote controller thermistor only When the Second Code No. is set to 02, room temperature is controlled by the remote sensor thermistor.
  • Page 223 SiUS301716EE Field Settings with Remote Controller Note(s) The control is automatically switched to the one performed only by the suction air thermistor for indoor unit when the Second code No. is 01 during group control. To use the remote controller thermistor control during group control, select the Second code No.
  • Page 224 Field Settings with Remote Controller SiUS301716EE Detection State of absence (°F) (°C) 87.8 84.2 82.4 80.6 Cooling (at 28°C (82.4°F)) 78.8 69.8 Heating (at 20°C (68°F)) 66.2 64.4 62.2 30 (60) 60 (120) Elapsed time of absence (min.)  The values in parentheses represent the time when Second code No.
  • Page 225 SiUS301716EE Field Settings with Remote Controller There is a limitation of combination between Ton and Toff as below due to 2°C (3.6°F) hysteresis required for reliability. Second Code No. –4°C –3.5°C –3°C –2.5°C –2°C –1.5°C (–7.2°F) (–6.3°F) (–5.4°F) (–4.5°F) (–3.6°F) (–2.7°F) 0.5°C (0.9°F) 0°C (0°F)
  • Page 226 Field Settings with Remote Controller SiUS301716EE 1.6.9 Electric Heater Capacity Setting (for FXTQ-TA, FXTQ-TB models) : Factory setting Second Code No. 01 First Mode Heater (kW) Model Code heater kit FXTQ09TA — — — — — — — h FXTQ09TB FXTQ12TA —...

  • Page 227: Setting Procedure

    SiUS301716EE Field Settings with Remote Controller 1.6.11 Automatic Airflow Adjustment Make external static pressure setting automatically using automatic airflow adjustment (11 (21)-7), or manually using external static pressure settings (13 (23)-6). The volume of blow-off air is automatically adjusted to the rated quantity. Make settings before performing the test operation of the outside unit.
  • Page 228 Field Settings with Remote Controller SiUS301716EE 1.6.12 Compensating the Temperature around People (For units with the infrared floor sensor only) Change the ratio between the suction air temperature and floor temperature used to calculate the temperature around human. The temperature around human is calculated using the values of the suction air thermistor and the infrared floor sensor.

  • Page 229: External On/Off Input

    SiUS301716EE Field Settings with Remote Controller 1.6.15 Optional Accessories Output Selection Using this setting, operation output signal and abnormal output signal can be provided. Output signal is output between terminals X1 and X2 of adaptor for wiring, an optional accessory. : Factory setting Mode First Code...

  • Page 230: Auto Restart After Power Failure

    Field Settings with Remote Controller SiUS301716EE 1.6.18 Airflow Setting when Heating Thermostat is OFF This setting is used to set airflow when heating thermostat is OFF. If the airflow setting when thermostat is OFF is set to 03: OFF, the air in the indoor unit will be stagnant and suction air thermistor may not detect room temperature correctly, resulting in problems that thermostat will not be ON easily.
  • Page 231 SiUS301716EE Field Settings with Remote Controller 1.6.21 Airflow Setting when Cooling Thermostat is OFF This is used to set airflow to LL airflow when cooling thermostat is OFF. If the airflow setting when thermostat is OFF is set to 03: OFF, the air in the indoor unit will be stagnant and suction air thermistor may not detect room temperature correctly, resulting in problems that thermostat will not be ON easily.

  • Page 232: Airflow Direction Setting

    Field Settings with Remote Controller SiUS301716EE FXZQ-TA, FXZQ-TB, FXZQ-M, FXEQ-P : Factory setting Mode First Code Second Setting Ceiling height Code No. 01 Standard Lower than 2.7 m (8-3/4 ft) 13 (23) High Ceiling 1 Lower than 3.0 m (10 ft) Higher Ceiling 2 Lower than 3.5 m (11-1/2 ft) FXUQ-P, FXUQ-PA...
  • Page 233 SiUS301716EE Field Settings with Remote Controller 1.6.24 Swing Pattern Settings (For units with the infrared floor sensor only) Set the flap operation in swing mode. With the factory swing, flaps facing each other are synchronized to operate, and flaps placed side by side are set to swing in an opposite direction to agitate airflow to reduce temperature irregularity.
  • Page 234 Field Settings with Remote Controller SiUS301716EE 1.6.27 External Static Pressure Settings Make external static pressure setting automatically using automatic airflow adjustment (11 (21)-7), or manually using external static pressure settings (13 (23)-6). FXSQ-TA, FXSQ-TB models : Factory setting Mode No. First Code No.
  • Page 235 SiUS301716EE Field Settings with Remote Controller FXMQ-TB models : Factory setting Mode No. First Code No. Second Code No. Contents 50 Pa (0.20 inWG) 60 Pa (0.24 inWG) 70 Pa (0.28 inWG) 80 Pa (0.32 inWG) 90 Pa (0.36 inWG) 07...
  • Page 236 Field Settings with Remote Controller SiUS301716EE 1.6.28 Optional Kit Setting (UV lamp + Humidifier + Economizer) (for FXTQ-TA, FXTQ-TB models) : Factory setting Contents Second Code Economizer setting for Mode No. First Code No. UV lamp + humidifier fan Mech standby duration speed (minutes) Refer to controller...
  • Page 237 SiUS301716EE Field Settings with Remote Controller 1.6.31 Drain Pump Operation Setting The drain pump operation can be disabled for natural drainage by changing the following field setting. : Factory setting FXMQ-PB Mode First Code Second Code Contents — 15 (25) 02...

  • Page 238: Room Temperature Display

    Field Settings with Remote Controller SiUS301716EE 1.6.35 Individual Ventilation Setting This is set to perform individual operation of Energy recovery ventilator using the remote controller/central unit when Energy recovery ventilator is built in. (Switch only when Energy recovery ventilator is built in.) : Factory setting Mode First Code...
  • Page 239 SiUS301716EE Field Settings with Remote Controller 1.6.39 Access Permission Level Setting  For BRC1E73 only There are 2 levels as follows:  Level 2: The following buttons are selectable to be disable or enable.  Level 3: No buttons are selectable and only On/Off button is available. Button Level 2 Level 3...

  • Page 240: List Of Field Settings For Outdoor-Air Processing Unit

    Field Settings with Remote Controller SiUS301716EE List of Field Settings for Outdoor-Air Processing Unit : Factory setting First Second Code No. Mode Code Setting Contents 2500 hr Filter contamination 1250 hr — — — — — — — — — —...
  • Page 241 SiUS301716EE Field Settings with Remote Controller How to Select Operation Mode Whether operation by remote controller will be possible or not for turning ON/OFF, controlling temperature or setting operation mode is selected and decided by the operation mode given on the right edge of the table below.

  • Page 242: Field Setting From Outside Unit

    Field Setting from Outside Unit SiUS301716EE 2. Field Setting from Outside Unit To continue the configuration of the VRV Water Cooled System, it is required to give some input to the PCB of the unit. This chapter will describe how manual input is possible by operating the BS buttons/DIP switches on the PCB and reading the feedback from the 7-segment displays.
  • Page 243 SiUS301716EE Field Setting from Outside Unit 2.1.2 When Mounting a Spare PCB Caution  After replacement with spare PCB, be sure to make settings shown in the table on the following page. The procedure for making settings of spare PCB is different from that used for factory settings described above.
  • Page 244 Field Setting from Outside Unit SiUS301716EE The figure below shows the required position of the DIP switches on spare PCB. Change DIP switches at time of power disconnected. Application model The setting method ( represents the position of switches) RWEQ72TB Set DS2-2 to ON.

  • Page 245: Accessing The Bs Buttons On The Pcb

    SiUS301716EE Field Setting from Outside Unit Accessing the BS Buttons on the PCB It is not required to open the complete electronic component box to access the BS buttons on the PCB and read out the 7-segment display(s). To access you can remove the front plate (see figure). Now you can open the inspection cover of the electrical component box front plate (see figure).

  • Page 246: Operating The Bs Buttons And Dip Switches On The Pcb

    Field Setting from Outside Unit SiUS301716EE Operating the BS Buttons and DIP Switches on the PCB Operating the BS By operating the BS buttons it is possible to: buttons  Perform special actions (test operation, etc.).  Perform field settings (demand operation, low noise, etc.). Below procedure explains how to operate the BS buttons to reach the required mode in the menu, select the correct setting and modify the value of the setting.

  • Page 247: Access Mode

    SiUS301716EE Field Setting from Outside Unit Accessing modes The MODE (BS1) button is used to change the mode you want to access.  Access mode 1 Press the MODE (BS1) button once. Segment indication changes to:  Access mode 2 Press the MODE (BS1) button for at least 5 seconds.
  • Page 248 Field Setting from Outside Unit SiUS301716EE Mode 2 Mode 2 is used to set field settings of the outside unit and system.  Changing and access the setting in mode 2: Once mode 2 is selected (press the MODE (BS1) button for more than 5 seconds), you can select the wanted setting.

  • Page 249: Connecting Of The Optional Pc Configurator Cable To The Outside Unit

    SiUS301716EE Field Setting from Outside Unit Connecting of the Optional PC Configurator Cable to the Outside Unit Connecting the PC configurator to the outside unit has to be done on A1P. Connect the 999482P3 cable to the 5-pin blue connector X27A. Caution Works executed on the outside unit are best done under dry weather conditions to avoid water ingress.
  • Page 250 Field Setting from Outside Unit SiUS301716EE [1-2]: shows the status of power consumption limitation operation.  0: unit is currently not operating under power consumption limitations  1: unit is currently operating under power consumption limitation Power consumption limitation reduces the power consumption of the unit compared to nominal operating conditions.
  • Page 251 SiUS301716EE Field Setting from Outside Unit 2.5.2 Mode 2 Mode 2 is used to change the field settings of the system. Consulting the current field setting value and changing the current field setting value is possible. In general, normal operation can be resumed without special intervention after changing field settings.
  • Page 252 Field Setting from Outside Unit SiUS301716EE [2-9]: Tc target temperature during heating operation without VRT control Value Tc target [2-9] 41°C (105.8°F) 42°C (107.6°F) 43°C (109.4°F) 44°C (111.2°F) 45°C (113.0°F) 6 (default) 46°C (114.8°F) 49°C (120.2°F) [2-10]: ON condition setting for valve/pump operation request signal (RWEQ-TB models only) Value Description [2-10]...
  • Page 253 SiUS301716EE Field Setting from Outside Unit [2-16]: Heat pump lockout 1 Heat pump is always locked out when this setting is ON. If the indoor fan control needs to be changed or the auto-backup function is required, refer to the setting [2-37]. Value Heat pump lockout 1 [2-16]...
  • Page 254 Field Setting from Outside Unit SiUS301716EE [2-25]: Water volume minimum setting Field setting of lower limit (%) of quantity of water control Value Min. setting [2-25] 4 (default) [2-28]: Power transistor check mode Value Power transistor check mode [2-28] 0 (default) [2-30]: Power consumption limitation level (step 1) via the external control adaptor (DTA104A61/62)
  • Page 255 SiUS301716EE Field Setting from Outside Unit [2-32]: Forced, all time, power consumption limitation operation (no external control adaptor is required to perform power consumption limitation) If the system always needs to run under power consumption limitation conditions, this setting activates and defines the level power consumption limitation that will be applied continuously.
  • Page 256 Field Setting from Outside Unit SiUS301716EE Automatic lockout When this setting is made, the auto-backup function will automatically be activated. This will allow the auxiliary or secondary heat source to be automatically energized in the event of a system failure related to outside units.
  • Page 257 SiUS301716EE Field Setting from Outside Unit [2-39]: Emergency operation “Sub 1” To disable permanent compressor operation: in case of “Sub 1” unit of a multi outside system, this setting allows:  Default value: 0. Compressor operation enabled.  Field setting: Set 1: compressor in this “Sub 1”...
  • Page 258 Field Setting from Outside Unit SiUS301716EE [2-47]: Te target temperature during heat recovery operation Value Te target [2-47] 0 (default) Auto 3°C (37.4°F) 6°C (42.8°F) 7°C (44.6°F) 8°C (46.4°F) 9°C (48.2°F) 10°C (50°F) 11°C (51.8°F) [2-49]: Height difference setting Default value: 0. When the installed height of the outside units is the same or higher than that of all the connected indoor units, this setting [2-49] can be changed to 2 to enable more energy-efficient operation at low load conditions.
  • Page 259 SiUS301716EE Field Setting from Outside Unit [2-54]: Evaporation temperature target value of the Branch Selector unit downstream indoor unit Value Te target [2-54] 0 (default) 3°C - 9°C (37.4°F - 48.2°F) 0°C - 6°C (32.0°F - 42.8°F) 1°C - 7°C (33.8°F - 44.6°F) 2°C - 8°C (35.6°F - 46.4°F) 4°C - 10°C (39.2°F - 50.0°F) 5°C - 11°C (41.0°F - 51.8°F)
  • Page 260 Field Setting from Outside Unit SiUS301716EE [2-74]: Exhaust heat cancellation temperature setting The unit internal temperature that exhaust heat cancellation becomes ON Exhaust heat cancellation temperature Value [2-74] °C °F 80.6 84.2 3 (default) 87.8 91.4 98.6 102.2 [2-75]: Differential temperature of exhaust heat cancellation ON/OFF Differential temperature Value [2-75]...
  • Page 261 SiUS301716EE Field Setting from Outside Unit [2-83]: Cool/Heat selection at the Branch Provider unit connection Value Cool/Heat selection [2-83] Set by master unit 1 (default) Set by the unit which remote control is turned on earliest [2-87]: Backup operation during outside unit lockout due to abnormalities Setting to allow the auxiliary or secondary heat source to be automatically activated in the event of a system failure related to the outside units.

  • Page 262: Detailed Explanation Of Setting Modes

    Field Setting from Outside Unit SiUS301716EE Detailed Explanation of Setting Modes 2.6.1 Cool/Heat Mode Switching (Heat Pump Connection) There are the following 5 cool/heat switching modes. Set cool/heat separately for each outside unit system by indoor unit remote controller. Set cool/heat separately for each outside unit system by cool/heat selector. Set cool/heat for more than single outside unit system simultaneously in accordance with unified master outside unit by indoor unit remote controller.
  • Page 263 SiUS301716EE Field Setting from Outside Unit (1) Set Cool/Heat Separately for Each Outside Unit System by Indoor Unit Remote Controller  It does not matter whether or not there is outside - outside unit wiring.  Set outside unit PCB DS1-1 to IN (factory setting). ...
  • Page 264 Field Setting from Outside Unit SiUS301716EE (3) Set Cool/Heat for more than Single Outside Unit System Simultaneously in Accordance with Unified Master Outside Unit by Indoor Unit Remote Controller  Install the external control adaptor for outside unit on either the outside-outside, indoor-outside transmission line.
  • Page 265 SiUS301716EE Field Setting from Outside Unit (4) Set Cool/Heat for more than Single Outside Unit System Simultaneously in Accordance with Unified Master Outside Unit by Cool/Heat Selector  Install the external control adaptor for outside unit on either the outside-outside, indoor-outside transmission line.
  • Page 266 Field Setting from Outside Unit SiUS301716EE Supplementation on (3) and (4). When switching cool/heat for each adaptor PCB with the use of more than 1 adaptor PCB, set the address of the external control adaptor for outside unit PCB DS1 and DS2 so that it matches the unified cool/heat address of outside unit main PCB.
  • Page 267 SiUS301716EE Field Setting from Outside Unit (5) Set cool/heat at all outside unit systems simultaneously for each outside unit external control adaptor by using the central remote controller.  Install the outside unit external control adaptor (optional accessory) onto the outside-outside, indoor-outside, or indoor-indoor transmission line.
  • Page 268 Field Setting from Outside Unit SiUS301716EE Setting of Address In binary, set the address number (middle 2 digits) and terminal No. (last 3 digits) of the external control adaptor (DIP switches) and outside unit main PCB (7-segment display). Outside unit main PCB 7-segment display Address Terminal External control adaptor for outside unit...

  • Page 269: Cool/Heat Mode Changeover

    SiUS301716EE Field Setting from Outside Unit 2.6.2 Cool/Heat Mode Changeover Set Cool/Heat Separately for Each Branch Selector Unit by Cool/Heat Selector. Set remote controller changeover switch (SS1, SS2) as following:  When using COOL/HEAT selector, turn this switch to the BS side. NOTE: This setting must be completed before turning power supply ON.
  • Page 270 Field Setting from Outside Unit SiUS301716EE 2.6.3 Demand Operation By connecting the external contact input to the demand input of the outside unit external control adaptor for outside unit (optional), the power consumption of unit operation can be saved suppressing the compressor operating condition. Description of setting Setting procedure External control...
  • Page 271 SiUS301716EE Field Setting from Outside Unit When the Normal demand operation is carried out. (Use of the external control adaptor for outside unit is not required.) While in setting mode 2, make setting of the set item No. 32 (Setting of alternate demand) to ON.
  • Page 272 Field Setting from Outside Unit SiUS301716EE Image of operation in the case of A and B The power Power consumption consumption can be set with the "Demand 1 level setting". ("70 % of rated power Rated power consumption consumption" has been set at factory.) 70 % of rated power...
  • Page 273 SiUS301716EE Field Setting from Outside Unit 2.6.4 Refrigerant Additional Charging Operation When additional refrigerant is not charged all with outside unit in stop mode, operate the outside unit and charge the liquid refrigerant from the service port of liquid stop valve. The additional charging operation is activated by BS button switch on the outside unit PCB.
  • Page 274 Field Setting from Outside Unit SiUS301716EE Power ON the indoor unit and outside unit. STEP 2 Turn the power ON 6 hours before the operation in order to protect the compressor. Additional Connect the charge hose to the stop valve service port of gas side. charge with compressor operation...
  • Page 275 SiUS301716EE Field Setting from Outside Unit Caution Refrigerant cannot be charged until field wiring has been completed. Refrigerant may only be charged after performing the leak test and the vacuum drying. When charging a system, care shall be taken that its maximum permissible charge is never exceeded, in view of the danger of liquid hammer.

  • Page 276: Heat Pump System

    Field Setting from Outside Unit SiUS301716EE  Procedures for charging additional refrigerant. Heat Pump system Close Close Gas side Outside unit Outside unit Liquid Pressure side reducing valve Charge hose R-410A Valve A Refrigerant tank With a siphon Stop valve service port To indoor unit Measuring instrument Vacuum pump...

  • Page 277: Tightening Torque

    SiUS301716EE Field Setting from Outside Unit Opening stop valve Remove the cap and turn the valve counterclockwise with the hexagon wrench (JISB4648). Turn it until the shaft stops. Do not apply excessive force to the stop valve. Doing so may break the valve body, as the valve is not a backseat type.

  • Page 278: Operation State

    Field Setting from Outside Unit SiUS301716EE [Heat pump system] [Heat recovery system] Remove the cap and turn Never remove Remove the cap and turn the valve counter clockwise the partition flange the valve counter clockwise with the hexagon wrenches for any reason. with the hexagon wrenches until it stops.

  • Page 279: Operation Procedure

    SiUS301716EE Field Setting from Outside Unit 2.6.5 Refrigerant Recovery Mode When carrying out the refrigerant collection on site, fully open the respective electronic expansion valve of indoor and outside units Operation procedure In setting mode 2-21 with units in stop mode, set Refrigerant recovery/vacuuming mode to ON.

  • Page 280: Field Settings For Branch Selector Unit

    Field Settings for Branch Selector Unit SiUS301716EE 3. Field Settings for Branch Selector Unit Field Settings for Single Branch Selector Unit Follow the instructions below to set the DIP switches as necessary. Warning Electric shock hazard! Before performing work, be sure to disconnect any power source connected to the unit.

  • Page 281: Field Settings For Multi Branch Selector Unit (Standard Series)

    SiUS301716EE Field Settings for Branch Selector Unit Field Settings for Multi Branch Selector Unit (Standard Series) Follow the instructions below to set the DIP switches as necessary. Warning Electric shock hazard! Before performing work, be sure to disconnect any power source connected to the unit.

  • Page 282: Field Settings For Multi Branch Selector Unit (Flex Series)

    Field Settings for Branch Selector Unit SiUS301716EE 2. Setting when joining branch ports Setting when joining branch ports Setting (Example 2) ON (Joined) DIP switch setting OFF (Factory default) (A1P) (A2P) (A3P) DIP switch No. (Example 2) When joining the A and B BS4Q54TVJ branches BS4Q54TAVJ...
  • Page 283 SiUS301716EE Field Settings for Branch Selector Unit BSF6/8Q54TVJ Branch port number 1 2 3 4 Note DIP switch A B C D E F G H Note) As for factory default, refer to the electric wiring diagram attached to the control box cover. Terminal No.

  • Page 284: How To Check Miswiring For Multi Branch Selector Unit

    Field Settings for Branch Selector Unit SiUS301716EE How to Check Miswiring for Multi Branch Selector Unit When miswiring of the transmission wire between the Branch Selector unit and the indoor unit is suspected It is possible to check the miswiring by operating the DIP switches to turn ON the corresponding indoor fans to see which wires are miswired according to the procedure below.

  • Page 285: Test Operation

    SiUS301716EE Test Operation 4. Test Operation Procedure and Outline Follow the following procedure to conduct the initial test operation after installation. 4.1.1 Check Work Prior to Turn Power Supply ON z Is the wiring performed as specified? Check the below items. z Are the designated wires used? •...

  • Page 286: Turn Power On

    Test Operation SiUS301716EE 4.1.2 Turn Power ON Turn outside unit, indoor unit, • Be sure to turn the power ON 6 hours before starting operation to protect Branch Selector unit and heat compressors. (to power ON crankcase heater) source water pump power ON. •...

  • Page 287: Check Operation

    SiUS301716EE Test Operation When an Indoor Unit or Outside Unit has been Changed, or Indoor or Outside Unit PCB has been Changed Refer to page 236 for location of DIP switch and BS buttons. 4.1.3 Check Operation Be sure to conduct the check operation. If the check operation is not conducted, the error code “U3” will be displayed on the remote controller and outside unit PCB segment display, thus disabling the normal operation.
  • Page 288 Test Operation SiUS301716EE STEP Control Pressure equalization control Startup control in cooling Standby for stabilization of refrigerant state Check whether there is wrong wiring, or gas stop valve is open Check whether liquid stop valve is open Confirmation of the piping length After heating changeover, check whether discharge side stop valve is open Pump-down Pressure equalization control.

  • Page 289: Error Code

    SiUS301716EE Test Operation Error code In case of an alarm code displayed on remote controller: Error code Installation error Remedial action The stop valve of an outside unit is not opened. Open the stop valve. Check referring to “Refrigerant additional charging operation” on page 266.
  • Page 290 SiUS301716EE Part 6 Service Diagnosis 1. Symptom-based Troubleshooting ............286 1.1 Indoor Unit Overall ................... 286 1.2 With Infrared Presence/Floor Sensor ............289 2. Error Code via Remote Controller............290 2.1 BRC1E73 ....................290 2.2 BRC1H71W....................291 2.3 Wireless Remote Controller ..............291 3.
  • Page 291 SiUS301716EE 3.31 Detection of Ground Leakage by Leak Detection Circuit ......355 3.32 Missing of Ground Leakage Detection Core ..........356 3.33 Activation of High Pressure Switch ............357 3.34 Activation of Low Pressure Sensor ............359 3.35 Compressor Motor Lock ................360 3.36 Electronic Expansion Valve Coil Abnormality...........
  • Page 292 SiUS301716EE 4.4 Power Transistor Check ................434 4.5 Wet Operation Check ................435 4.6 Refrigerant Overcharge Check..............437 4.7 Refrigerant Shortage Check..............438 4.8 Vacuuming and Dehydration Procedure ..........439 4.9 Thermistor Check ..................440 4.10 Pressure Sensor Check ................443 4.11 Broken Wire Check of the Relay Wires ............

  • Page 293: Symptom-Based Troubleshooting

    SiUS301716EE Symptom-based Troubleshooting 1. Symptom-based Troubleshooting Indoor Unit Overall Symptom Supposed Cause Countermeasure The system does not start operation at all. Blowout of fuse(s) Turn OFF the power supply and then replace the fuse(s). Cutout of breaker(s) • If the knob of any breaker is in its OFF position, turn ON the power supply.
  • Page 294 Symptom-based Troubleshooting SiUS301716EE Symptom Supposed Cause Countermeasure COOL/HEAT The remote controller displays This remote controller has no option Use a remote controller with option to selection is CENTRAL CONTROL. to select cooling operation. select cooling operation. disabled. The remote controller displays COOL/HEAT selection is made using Use the COOL/HEAT selection CENTRAL CONTROL, and the...
  • Page 295 SiUS301716EE Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure The system Indoor unit These are operating sounds of the Normal operation. produces sounds. Immediately after turning ON electronic expansion valve of the This sound becomes low after a the power supply, indoor unit indoor unit.

  • Page 296: With Infrared Presence/Floor Sensor

    Symptom-based Troubleshooting SiUS301716EE With Infrared Presence/Floor Sensor Condition Measure Louver operation different from setting or no downward airflow Refer to the flowchart below. in heating operation Individual airflow direction setting different from the actual Refer to the flowchart below. airflow direction 3 While not operating, the louver does not close completely.

  • Page 297: Error Code Via Remote Controller

    SiUS301716EE Error Code via Remote Controller 2. Error Code via Remote Controller BRC1E73 The following will be displayed on the screen when an error (or a warning) occurs during operation. Check the error code and take the corrective action specified for the particular model. Screen Operation lamp (1) Checking an error or warning.

  • Page 298: Brc1H71W

    Error Code via Remote Controller SiUS301716EE BRC1H71W Home screen When the indoor unit is in error, the controller will display Auto Cool on the home screen. Room Information screen Press and hold on the Home screen for 5 seconds. 12:34 The unit number and error code will be displayed at the bottom of the information screen.
  • Page 299 SiUS301716EE Error Code via Remote Controller  The upper digit of the code changes as shown below. O0 A C E H F J L P U 9 8 7 6 5 4 UP button DOWN button Continuous beep: Both upper and lower digits match. (Error code is confirmed.) 2 short beeps: The upper digit matches but the lower digit does not.

  • Page 300: Troubleshooting By Error Code

    Troubleshooting by Error Code SiUS301716EE 3. Troubleshooting by Error Code Error Codes and Descriptions k: ON h: OFF l: Blink Error Operation Reference Error contents code lamp page External protection device abnormality Indoor unit control PCB abnormality Drain level control system abnormality Indoor fan motor lock, overload Indoor fan motor abnormality Overload/overcurrent/lock of indoor fan motor...
  • Page 301 SiUS301716EE Troubleshooting by Error Code Error Operation Reference Error contents code lamp page Harness abnormality (between outside unit main PCB and inverter PCB) Outside unit inside thermistor (R1T) abnormality Water inlet thermistor (R9T) abnormality Water outlet thermistor (R10T) abnormality Water system abnormality Discharge pipe thermistor (R12T) abnormality Compressor body thermistor (R13T) abnormality Plate heat exchanger gas thermistor (R4T) abnormality...

  • Page 302: Error Codes (Sub Codes)

    Troubleshooting by Error Code SiUS301716EE Error Codes (Sub Codes) If an error code like the one shown below is displayed when a wired remote controller is in use, make a detailed diagnosis or a diagnosis of the relevant unit. 3.2.1 Indoor Unit Troubleshooting Error code Error Description...
  • Page 303 SiUS301716EE Troubleshooting by Error Code 3.2.2 Branch Selector Unit Troubleshooting Error code Error Description Diagnosis Branch Selector unit electronic expansion valve F9 - 01 abnormality Branch Selector unit electronic expansion valve Refer to the F9 flowchart and make a diagnosis based F9 - 02 abnormality on the Error code shown to the left.
  • Page 304 Troubleshooting by Error Code SiUS301716EE Troubleshooting Error code Error Description Diagnosis F9 - 01 Electronic expansion valve error (EVH) Refer to the F9 flowchart and make a diagnosis of the relevant electronic expansion valve of the relevant unit F9 - 02 Electronic expansion valve error (EVL) based on the Error code shown to the left.
  • Page 305 SiUS301716EE Troubleshooting by Error Code Troubleshooting Error code Error Description Diagnosis J5 - 01 Defective suction pipe thermistor (R3T) (Master) Refer to the J5 flowchart and make a diagnosis of the relevant thermistor of the relevant unit based on the Error J5 - 03 Defective suction pipe thermistor (R3T) (Slave 1) code shown to the left.
  • Page 306 Troubleshooting by Error Code SiUS301716EE Troubleshooting Error code Error Description Diagnosis L1 - 01 IPM error: Compressor M1C (Master) Refer to the L1 flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left. L1 - 02 Defective current sensor 1: Compressor M1C (Master) L1 - 03...
  • Page 307 SiUS301716EE Troubleshooting by Error Code Troubleshooting Error code Error Description Diagnosis L5 - 03 Compressor M1C momentary overcurrent (Master) Refer to the L5 flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left. L5 - 04 Defective IGBT (1) Inverter PCB (A3P) (Master) L5 - 05...
  • Page 308 Troubleshooting by Error Code SiUS301716EE Troubleshooting Error code Error Description Diagnosis U0 - 03 Refrigerant shortage warning Refer to the U0 flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left. U0 - 24 Refrigerant shortage alert or abnormality U1 - 01 Reverse phase/open phase of power supply (Master)
  • Page 309 SiUS301716EE Troubleshooting by Error Code Troubleshooting Error code Error Description Diagnosis Incorrect electric heater capacity setting Refer to page 420. UA - 17 Connection of excessive indoor units Refer to the UA flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left. UA - 18 Connection of wrong models of indoor units UA - 20...

  • Page 310: External Protection Device Abnormality

    Troubleshooting by Error Code SiUS301716EE External Protection Device Abnormality 3.3.1 External Protection Device Abnormality (Except FXTQ-TA, FXTQ-TB) Applicable All indoor unit models (except FXTQ-TA, FXTQ-TB) Models Error Code Method of Error Detects open or short circuit between external input terminals in indoor unit. Detection Error Decision When an open circuit occurs between external input terminals with the remote controller set to...
  • Page 311 SiUS301716EE Troubleshooting by Error Code 3.3.2 External Protection Device Abnormality (FXTQ-TA, FXTQ-TB Only) Applicable FXTQ-TA, FXTQ-TB Models A0-01 Error Code Method of Error Detect open or short circuit between external input terminals in indoor unit. Detection Error Decision When an open circuit occurs between external input terminals. Conditions Supposed ...

  • Page 312: Indoor Unit Control Pcb Abnormality

    Troubleshooting by Error Code SiUS301716EE Indoor Unit Control PCB Abnormality Applicable All indoor unit models Models Error Code Method of Error Check data from EEPROM. Detection Error Decision When data could not be correctly received from the EEPROM Conditions EEPROM : Type of nonvolatile memory. Maintains memory contents even when the power supply is turned OFF.

  • Page 313: Drain Level Control System Abnormality

    SiUS301716EE Troubleshooting by Error Code Drain Level Control System Abnormality Applicable FXFQ-AA, FXFQ-T, FXFQ-P, FXZQ-TA, FXZQ-TB, FXZQ-M, FXUQ-P, FXUQ-PA, FXEQ-P, Models FXDQ-M, FXSQ-TA, FXSQ-TB, FXMQ-PB, FXMQ-TB, FXMQ-TA (Option) Error Code Method of Error By float switch OFF detection Detection Error Decision When rise of water level is not a condition and the float switch goes OFF.
  • Page 314 Troubleshooting by Error Code SiUS301716EE The drain pump works when the Check the drain piping for power supply is reset for the clogging or upward slope, etc. indoor unit. voltage of drain pump terminals ( 2) is in accordance to the criteria Replace the indoor unit control ( 3) (within 5 minutes of PCB (A1P).

  • Page 315: Indoor Fan Motor Lock, Overload

    SiUS301716EE Troubleshooting by Error Code Indoor Fan Motor Lock, Overload Applicable FXFQ-T, FXFQ-P, FXZQ-TA, FXZQ-TB, FXUQ-P, FXUQ-PA, FXEQ-P, FXSQ05-48TA, Models FXSQ05-48TB, FXMQ07-12PB, FXMQ15-24TB, FXAQ-P Error Code Method of Error Abnormal fan revolutions are detected by a signal output from the fan motor. Detection Error Decision When the fan revolutions do not increase...
  • Page 316 Troubleshooting by Error Code SiUS301716EE Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn OFF the power supply, and then wait for a period of 10 minutes. Are there any foreign Remove the foreign matter.

  • Page 317: Indoor Fan Motor Abnormality

    SiUS301716EE Troubleshooting by Error Code Indoor Fan Motor Abnormality 3.7.1 Indoor Fan Motor Abnormality (FXFQ-AA Models) Applicable FXFQ-AA Models Error Code Method of Error  Detection from the current flow on the PCB (A1P) Detection  Detection from the current flow on the PCB when the fan motor starting operation Error Decision ...
  • Page 318 Troubleshooting by Error Code SiUS301716EE The HAP lamp on the indoor unit Replace the indoor unit control control PCB is PCB (A1P). blinking. Replace the fan motor (M1F). 1. Check also if the relay connector between the indoor unit control PCB and the fan motor are correctly connected.
  • Page 319 SiUS301716EE Troubleshooting by Error Code 3.7.2 Indoor Fan Motor Abnormality (FXDQ-M, FXHQ-M Models) Applicable FXDQ-M, FXHQ-M Models Error Code Method of Error This error is detected if there is no revolution detection signal output from the fan motor. Detection Error Decision When no revolutions can be detected even at the maximum output voltage to the fan Conditions Supposed...
  • Page 320 Troubleshooting by Error Code SiUS301716EE 3.7.3 Indoor Fan Motor Abnormality (FXSQ54TA, FXSQ54TB, FXMQ15-54PB, FXMQ30-54TB, FXMQ-TA Models) Applicable FXSQ54TA, FXSQ54TB, FXMQ15-54PB, FXMQ30-54TB, FXMQ-TA Models Error Code Method of Error  Error from the current flow on the fan PCB Detection  Error from the rotation speed of the fan motor in operation ...
  • Page 321 SiUS301716EE Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn OFF the power and wait for 10 minutes. There is a foreign matter around Remove the foreign matter.
  • Page 322 Troubleshooting by Error Code SiUS301716EE resistance among U, V, and W Replace the indoor fan motor (M1F). are unbalanced or short circuited. CHECK 17 Remove the signal connector from the fan motor and check the resistance. Between Vcc and GND terminals, and Replace the indoor fan motor (M1F).

  • Page 323: Overload/Overcurrent/Lock Of Indoor Fan Motor

    SiUS301716EE Troubleshooting by Error Code Overload/Overcurrent/Lock of Indoor Fan Motor Applicable FXMQ-M Models Error Code Outline This error is detected by detecting that the individual power supply for the fan turns OFF. Error Decision When it is not detected that the individual power supply for the indoor fan turns ON while in Conditions operation.

  • Page 324: Blower Motor Not Running

    Troubleshooting by Error Code SiUS301716EE Blower Motor Not Running Applicable FXTQ-TA, FXTQ-TB Models Error Code Outline Error is issued if the indoor unit determines that the indoor fan motor cannot rotate. Error Decision  Determining successive abnormalities Conditions Checks the rotation speed at 5-second intervals using the feedback of the fan motor. If that figure falls below 50 rpm for the specified number of consecutive times successively, it is deemed abnormal operation.

  • Page 325: Indoor Fan Motor Status Abnormality

    SiUS301716EE Troubleshooting by Error Code 3.10 Indoor Fan Motor Status Abnormality Applicable FXTQ-TA, FXTQ-TB Models A6-20 Error Code Outline The indoor unit periodically receives control status information from the fan motor. Error is issued when the information shows abnormality. Error Decision If the information shows Power Limit or Temp Limit status, it will be deemed a MOTOR LIMIT Conditions abnormal operation.

  • Page 326: Low Indoor Airflow

    Troubleshooting by Error Code SiUS301716EE 3.11 Low Indoor Airflow Applicable FXTQ-TA, FXTQ-TB Models A6-21 Error Code Outline Error is issued if the indoor unit determines that the indoor fan motor rotation is insufficient, regardless of the rotation command from indoor unit. Error Decision ...

  • Page 327: Swing Flap Motor Abnormality

    SiUS301716EE Troubleshooting by Error Code 3.12 Swing Flap Motor Abnormality Applicable FXHQ-M, FXAQ-P Models Error Code Method of Error Utilizes ON/OFF of the limit switch when the motor turns. Detection Error Decision When ON/OFF of the micro-switch for positioning cannot be reversed even though the swing flap Conditions motor is energized for a specified amount of time (about 30 seconds).
  • Page 328 Troubleshooting by Error Code SiUS301716EE The relay cable has no Replace the power supply continuity. relay cable. When the airflow direction flap-cam mechanism is disconnected Replace the defective swing from the swing motor, operation motor. (∗2) is normal when turned ON again.

  • Page 329: Power Supply Voltage Abnormality

    SiUS301716EE Troubleshooting by Error Code 3.13 Power Supply Voltage Abnormality Applicable FXSQ-TA, FXSQ-TB, FXMQ-PB, FXMQ-TB Models Error Code Method of Error Error is detected by checking the input voltage of the fan motor. Detection Error Decision When the input voltage of fan motor is 150 V or less, or 386 V or more. Conditions Supposed ...

  • Page 330: Blower Motor Stops For Over/Under Voltage

    Troubleshooting by Error Code SiUS301716EE 3.14 Blower Motor Stops for Over/Under Voltage Applicable FXTQ-TA, FXTQ-TB Models Error Code Outline The indoor unit periodically receives control status information from the fan motor. Error is issued when the information shows abnormality. Error Decision If the information shows Over/Under Voltage status, it will be deemed a MOTOR VOLTS abnormal Conditions operation.

  • Page 331: Electronic Expansion Valve Coil Abnormality, Dust Clogging

    SiUS301716EE Troubleshooting by Error Code 3.15 Electronic Expansion Valve Coil Abnormality, Dust Clogging Applicable All indoor unit models Models Error Code Method of Error Check coil condition of electronic expansion valve by using microcomputer. Detection Check dust clogging condition of electronic expansion valve main body by using microcomputer. Error Decision Pin input for electronic expansion valve coil is abnormal when initializing microcomputer.

  • Page 332: Drain Level Above Limit

    Troubleshooting by Error Code SiUS301716EE 3.16 Drain Level above Limit Applicable FXFQ-AA, FXFQ-T, FXFQ-P, FXZQ-TA, FXZQ-TB, FXZQ-M, FXUQ-P, FXUQ-PA, FXEQ-P, Models FXDQ-M, FXSQ-TA, FXSQ-TB, FXMQ-PB, FXMQ-TB, FXMQ-TA (Option) Error Code Method of Error Water leakage is detected based on float switch ON/OFF operation while the compressor is not in Detection operation.

  • Page 333: Self-Cleaning Decoration Panel Abnormality

    SiUS301716EE Troubleshooting by Error Code 3.17 Self-Cleaning Decoration Panel Abnormality Applicable FXFQ-AA (when self-cleaning decoration panel BYCQ54EEGFU is installed) Models FXFQ-T (when self-cleaning decoration panel BYCQ125BGW1 is installed) Error Code Method of Error Error is detected by abnormal signal from the self-cleaning decoration panel. Detection Error Decision Any of the following conditions is met while the unit is in operation.
  • Page 334 Troubleshooting by Error Code SiUS301716EE Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the transmission between self-cleaning decoration panel Go to Diagnosis Flowchart-1. and indoor unit (Transmission error between normal? self-cleaning decoration panel and indoor unit)
  • Page 335 SiUS301716EE Troubleshooting by Error Code Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-1 AH-03 Transmission error between self-cleaning decoration panel and indoor unit Is the connector ( 1) on the indoor unit control Properly connect the PCB properly connected? connector.
  • Page 336 Troubleshooting by Error Code SiUS301716EE Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-2 AH-04 Dust detection sensor error Is the connector X12A on the self-cleaning decoration panel PCB Properly connect the properly connected? connector.
  • Page 337 SiUS301716EE Troubleshooting by Error Code Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-3 AH-05 Dust collection sign error Is the inside of dust collection port clogged Clean the dust from the inside by dust? of dust collection port.
  • Page 338 Troubleshooting by Error Code SiUS301716EE Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-4 AH-06 Air filter rotation error Is the filter Properly attached the filter. properly attached? Is there any foreign matter in the filter Remove the foreign matter.
  • Page 339 SiUS301716EE Troubleshooting by Error Code From the previous page Start operation with remote controller. Error AH recurs, Normal. or the self-cleaning decoration panel lamp (red) blinks? The error could be caused by other causes. Refer to other diagnosis flowcharts in the following order: AH-05→03→04→07→08→09.
  • Page 340 Troubleshooting by Error Code SiUS301716EE Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-5 AH-07 Damper rotation error Is the damper Properly attached the damper. properly attached? Is there any foreign matter in the damper Remove the foreign matter.
  • Page 341 SiUS301716EE Troubleshooting by Error Code From the previous page Start operation with remote controller. Error AH recurs, Normal. or the self-cleaning decoration panel lamp (red) blinks? The error could be caused by other causes. Refer to other diagnosis flowcharts in the following order: AH-05→03→04→06→08→09.
  • Page 342 Troubleshooting by Error Code SiUS301716EE Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-6 AH-08 Filter auto clean operation error Is there any external factor other than the Remove the external factor.
  • Page 343 SiUS301716EE Troubleshooting by Error Code Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-7 AH-09 Filter auto clean operation start disabled error Has any air conditioning operation been Stop the air conditioning running continuously for operation and perform filter...

  • Page 344: Defective Capacity Setting

    Troubleshooting by Error Code SiUS301716EE 3.18 Defective Capacity Setting Applicable All indoor unit models Models Error Code Method of Error Capacity is determined according to resistance of the capacity setting adaptor and the memory Detection inside the IC memory on the indoor unit control PCB, and whether the value is normal or abnormal is determined.

  • Page 345: Transmission Abnormality Between Indoor Unit Control Pcb And Fan Pcb

    SiUS301716EE Troubleshooting by Error Code 3.19 Transmission Abnormality between Indoor Unit Control PCB and Fan PCB Applicable FXSQ-TA, FXSQ-TB, FXMQ-PB, FXMQ-TB, FXMQ-TA Models Error Code Method of Error Transmission conditions between the indoor unit control PCB (A1P) and fan PCB (A2P) are Detection checked via microcomputer.
  • Page 346 Troubleshooting by Error Code SiUS301716EE Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the connector between indoor unit control PCB Connect the connector (A1P) and fan PCB accurately.

  • Page 347: Blower Motor Communication Error

    SiUS301716EE Troubleshooting by Error Code 3.20 Blower Motor Communication Error Applicable FXTQ-TA, FXTQ-TB Models C1-07 Error Code Outline Error is issued if transmission abnormalities occur between indoor unit and fan motor. Error Decision If the response message from the fan motor is an abnormal message, and determined as such by Conditions the indoor unit, the indoor unit will execute a retry.

  • Page 348: Thermistor Abnormality

    Troubleshooting by Error Code SiUS301716EE 3.21 Thermistor Abnormality Applicable C4, C5: All indoor units Models C9: except FXTQ-TA, FXTQ-TB models CA: FXMQ-PB models only C4, C5, C9, CA Error Code Method of Error The error is determined by the temperature detected by the thermistor. Detection Error Decision The thermistor becomes disconnected or shorted while the unit is running.

  • Page 349: Combination Error Between Indoor Unit Control Pcb And Fan Pcb

    SiUS301716EE Troubleshooting by Error Code 3.22 Combination Error between Indoor Unit Control PCB and Fan PCB Applicable FXSQ-TA, FXSQ-TB, FXMQ-PB, FXMQ-TB, FXMQ-TA Models Error Code Method of Error Check the condition of transmission with fan PCB (A2P) using indoor unit control PCB (A1P). Detection Error Decision When the communication data of fan PCB (A2P) is determined as incorrect.

  • Page 350: Capacity Setting Abnormality

    Troubleshooting by Error Code SiUS301716EE 3.23 Capacity Setting Abnormality Applicable FXMQ-TA Models C6-01 Error Code Method of Error This error is detected by checking communication between the PCB (A1P) and the fan Detection microcomputer. Error Decision Based on the communication data, decide whether the combination of capacity setting and the Conditions type of fan driver is correct.

  • Page 351: Blower Motor Hp Mismatch

    SiUS301716EE Troubleshooting by Error Code 3.24 Blower Motor HP Mismatch Applicable FXTQ-TA, FXTQ-TB Models C6-01 Error Code Outline Error is issued if the manufacturer ID and output of the connected fan motor do not match those recognized by the indoor unit. Error Decision Gathers information on the manufacturer ID and output of the fan motor when initializing the fan Conditions...

  • Page 352: Indoor Blower Does Not Have Required Parameters To Function

    Troubleshooting by Error Code SiUS301716EE 3.25 Indoor Blower Does Not Have Required Parameters to Function Applicable FXTQ-TA, FXTQ-TB Models C6-02 Error Code Outline Indoor units perform required settings for control on the fan motor, but if the minimum required settings are not made then information indicating as such will be included among the periodic control status information.

  • Page 353: Remote Sensor Abnormality

    SiUS301716EE Troubleshooting by Error Code 3.26 Remote Sensor Abnormality Applicable FXTQ-TA, FXTQ-TB Models Error Code Method of Error The error is detected by remote sensor temperature. Detection Error Decision When the remote sensor becomes disconnected or shorted while the unit is running. Conditions Supposed ...

  • Page 354: Humidity Sensor System Abnormality

    Troubleshooting by Error Code SiUS301716EE 3.27 Humidity Sensor System Abnormality Applicable FXFQ-P Models Error Code Method of Error Even if an error occurs, operation still continues. Detection Error is detected according to the moisture (output voltage) detected by the moisture sensor. Error Decision When the moisture sensor is disconnected or short circuited Conditions...

  • Page 355: Infrared Presence/Floor Sensor Error

    SiUS301716EE Troubleshooting by Error Code 3.28 Infrared Presence/Floor Sensor Error Applicable FXFQ-AA, FXFQ-T, FXZQ-TA, FXZQ-TB, FXUQ-P, FXUQ-PA Models Error Code Method of Error The contents of a failure vary with the detailed error code. Check the code and proceed with the Detection flowchart.

  • Page 356: Diagnosis Procedure

    Troubleshooting by Error Code SiUS301716EE Diagnosis procedure 1 Infrared presence sensor error (Error code CE-01) Is the connection of the connector on infrared presence Connect the connector correctly. sensor PCB and the connector ( 1) normal? Is the connection of the Connect the connector correctly.
  • Page 357 SiUS301716EE Troubleshooting by Error Code Diagnosis procedure 2 Infrared floor sensor error (Error code CE-02) Is the connection of the connector on infrared floor Connect the connector correctly. sensor PCB and the connector ( 1) normal? Is the connection of the Connect the connector correctly.
  • Page 358 Troubleshooting by Error Code SiUS301716EE Diagnosis procedure 3 Infrared floor sensor error (Error code CE-03) Is the connection of the connector on infrared floor Connect the connector correctly. sensor PCB and the connector (1) normal? Is the connection of the Connect the connector correctly.
  • Page 359 SiUS301716EE Troubleshooting by Error Code Diagnosis procedure 4 Infrared floor sensor error (Error code CE-04) Is the connection of the connector on infrared floor Connect the connector correctly. sensor PCB and the connector ( 1) normal? Is the connection of the Connect the connector correctly.

  • Page 360: Remote Controller Thermistor Abnormality

    Troubleshooting by Error Code SiUS301716EE 3.29 Remote Controller Thermistor Abnormality Applicable All indoor unit models Models Error Code Method of Error Error detection is carried out by the temperature detected by the remote controller thermistor. Detection Error Decision The remote controller thermistor becomes disconnected or shorted while the unit is running. Conditions ...

  • Page 361: Outside Unit Pcb Abnormality

    SiUS301716EE Troubleshooting by Error Code 3.30 Outside Unit PCB Abnormality Applicable All outside unit models Models Error Code Method of Error Abnormality is detected under the communication conditions in the hardware section between the Detection indoor unit and outside unit. Error Decision When the communication conditions in the hardware section between the indoor unit and the Conditions...

  • Page 362: Detection Of Ground Leakage By Leak Detection Circuit

    Troubleshooting by Error Code SiUS301716EE 3.31 Detection of Ground Leakage by Leak Detection Circuit Applicable All outside unit models Models Error Code Sub code: 01-03 Method of Error Detect leakage current in the ground leakage detection circuit and detect error on the outside unit Detection main PCB.

  • Page 363: Missing Of Ground Leakage Detection Core

    SiUS301716EE Troubleshooting by Error Code 3.32 Missing of Ground Leakage Detection Core Applicable All outside unit models Models Error Code Sub code: 06-08 Method of Error Error is detected according to whether or not there is continuity across the connector X101A for Detection leakage detection circuit.

  • Page 364: Activation Of High Pressure Switch

    Troubleshooting by Error Code SiUS301716EE 3.33 Activation of High Pressure Switch Applicable All outside unit models Models Error Code Method of Error Detect continuity across the high pressure switch in the protection device circuit. Detection Error Decision When part of the protection device circuit opens. Conditions (Reference) Operating pressure of the high pressure switch: ...
  • Page 365 SiUS301716EE Troubleshooting by Error Code CHECK 12 Compare the voltage measurement of the connector of the pressure sensor ( 1) with the Replace the high pressure sensor measurement of the pressure (S1NPH). gauge. Are the 1 Use the table on CHECK 12 to characteristics of the convert the voltage measurement into high pressure...

  • Page 366: Activation Of Low Pressure Sensor

    Troubleshooting by Error Code SiUS301716EE 3.34 Activation of Low Pressure Sensor Applicable All outside unit models Models Error Code Method of Error Make judgment of pressure detected by the low pressure sensor with the outside unit main PCB. Detection Error Decision When low pressure caused a drop while the compressor is in operation: Conditions ...

  • Page 367: Compressor Motor Lock

    SiUS301716EE Troubleshooting by Error Code 3.35 Compressor Motor Lock Applicable All outside unit models Models Error Code Method of Error Outside unit PCB takes the position signal from UVW line connected between the inverter and Detection compressor, and the error is detected when any abnormality is observed in the phase-current waveform.
  • Page 368 Troubleshooting by Error Code SiUS301716EE The insulation resistance of the relevant Replace the compressor (M1C). compressor is low (< 100 k:) Power OFF The relevant compressor has a wiring disconnection in it. Restart the compressor, and then Quit work. check for the operation. Pressure equalization failure Does the error may have occurred.

  • Page 369: Electronic Expansion Valve Coil Abnormality

    SiUS301716EE Troubleshooting by Error Code 3.36 Electronic Expansion Valve Coil Abnormality Applicable All outside unit models Models Error Code Method of Error Detects according to whether or not there is continuity across the electronic expansion valve coils Detection (Y1E-Y3E). Error Decision When no current flows through common (COM[+]) at the time of turning ON the power supply.

  • Page 370: Discharge Pipe Temperature Abnormality

    Troubleshooting by Error Code SiUS301716EE 3.37 Discharge Pipe Temperature Abnormality Applicable All outside unit models Models Error Code Method of Error Detect according to temperature detected with the discharge pipe or compressor body thermistor. Detection Error Decision  When discharge pipe temperature becomes abnormally high (i.e., 135°C (275°F) or more) Conditions ...
  • Page 371 SiUS301716EE Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Connect the Service Checker. Reset the system operation, and then restart it. CHECK 11 Are the characteristics of the discharge pipe and Replace the relevant thermistor.

  • Page 372: Suction Pipe Temperature Abnormality

    Troubleshooting by Error Code SiUS301716EE 3.38 Suction Pipe Temperature Abnormality Applicable All outside unit models Models Error Code Method of Error Detect according to temperature detected with the suction pipe. Detection Error Decision  When suction pipe temperature becomes abnormally high (i.e., 60°C (140°F) or more) Conditions Supposed ...
  • Page 373 SiUS301716EE Troubleshooting by Error Code Is the “temperature” checked by the Service Replace the outside unit main Checker same as the PCB (A1P). measurement of the temperature? Turn the power supply OFF, then the power ON again. Please set emergency operation to OFF if set to ON.

  • Page 374: Refrigerant Overcharged

    Troubleshooting by Error Code SiUS301716EE 3.39 Refrigerant Overcharged Applicable All outside unit models Models Error Code Method of Error The error is detected according to the temperature detected by the discharge pipe temperature Detection during check operation. Error Decision When the discharge pipe temperature drops during check operation Conditions Supposed ...
  • Page 375 SiUS301716EE Troubleshooting by Error Code Carry out check operation again. Continue the operation. Error is displayed again? There is a possibility that there are other causes of refrigerant overfilling. : Remove the causes of wet operation. CHECK 5 Reference CHECK 5 Refer to page 435. Reference CHECK 11 Refer to page 440.

  • Page 376: Branch Selector Unit Electronic Expansion Valve Abnormality

    Troubleshooting by Error Code SiUS301716EE 3.40 Branch Selector Unit Electronic Expansion Valve Abnormality Applicable Branch Selector unit Models Error Code Method of Error The error is detected by whether or not all coils of the electronic expansion valve have continuity. Detection Error Decision The power supply turns ON, but there is no currents pass through the common (COM[+]).
  • Page 377 SiUS301716EE Troubleshooting by Error Code Note(s) 1. Use the sub code to identify the electronic expansion valve subject to error code F9. Electronic expansion valve Sub code Electronic expansion valve (EVH) Electronic expansion valve (EVL) Electronic expansion valve (EVSC) 2. Use the sub code to identify the electronic expansion valve for checking coil resistance subject to error code F9.

  • Page 378: Harness Abnormality (Between Outside Unit Main Pcb And Inverter Pcb)

    Troubleshooting by Error Code SiUS301716EE 3.41 Harness Abnormality (between Outside Unit Main PCB and Inverter PCB) Applicable All outside unit models Models Error Code Method of Error Check for the transmission conditions of the harnesses between the PCBs using microcomputer. Detection Error Decision Normal transmission between the PCBs is disabled while the compressor is not running.

  • Page 379: Thermistor System Abnormality

    SiUS301716EE Troubleshooting by Error Code 3.42 Thermistor System Abnormality Applicable All outside unit models Models H9, HC, J3, J4, J5, J6, J7, J9 Error Code Method of Error The error is detected according to the temperature detected by each individual thermistor. Detection Error Decision When thermistor is disconnected or short-circuited during operation...
  • Page 380 Troubleshooting by Error Code SiUS301716EE Note(s) 1. Error codes and thermistors Error Electric Sub Error Code Applicable Thermistor Connector Name Code symbol 01/02/03 Outside unit inside thermistor X11A (A4P) 03/04/05 Water inlet thermistor X29A (A1P) 06/07/08 Water outlet thermistor R10T X29A (A1P) 16/17/22/23/28/29 Discharge pipe thermistor...

  • Page 381: Water System Abnormality

    SiUS301716EE Troubleshooting by Error Code 3.43 Water System Abnormality Applicable All outside unit models Models Error Code Method of Error  Detect abnormalities using the thermistor on the heat exchanger gas side. Detection  Detect turned OFF interlock circuit. (When interlock setting is provided.) Error Decision ...
  • Page 382 Troubleshooting by Error Code SiUS301716EE Is the connector of the thermistor on the heat exchanger gas side Connect the connector properly. (R4T) and the low pressure sensor (S1NPL) properly connected? characteristics of the thermistor on the heat exchanger gas side Replace the thermistor/sensor if (R4T) and the low pressure any of its characteristics are...

  • Page 383: High Pressure Sensor Abnormality

    SiUS301716EE Troubleshooting by Error Code 3.44 High Pressure Sensor Abnormality Applicable All outside unit models Models Error Code Method of Error Detects according to temperature detected with the high pressure sensor. Detection Error Decision The high pressure sensor is short circuit or open circuit. Conditions (Pressure range: 0-4.3 MPa (0-624 psi)) Supposed...

  • Page 384: Low Pressure Sensor Abnormality

    Troubleshooting by Error Code SiUS301716EE 3.45 Low Pressure Sensor Abnormality Applicable All outside unit models Models Error Code Method of Error Detect according to temperature detected with the low pressure sensor. Detection Error Decision The low pressure sensor is short circuit or open circuit. Conditions (Pressure range: 0-1.7 MPa (0-247 psi)) Supposed...

  • Page 385: Inverter Pcb Abnormality

    SiUS301716EE Troubleshooting by Error Code 3.46 Inverter PCB Abnormality Applicable All outside unit models Models Error Code Method of Error  Detect current value during the output of waveform before compressor startup Detection  Detect current value with the current sensor during synchronous operation for startup Error Decision ...

  • Page 386: Reactor Temperature Rise Abnormality

    Troubleshooting by Error Code SiUS301716EE 3.47 Reactor Temperature Rise Abnormality Applicable All outside unit models Models Error Code Method of Error Detect according to the value detected with the reactor surface thermistor. Detection Error Decision When the temperature detected with the reactor surface thermistor is more than the specified Conditions temperature.

  • Page 387: Inverter Radiation Fin Temperature Rise Abnormality

    SiUS301716EE Troubleshooting by Error Code 3.48 Inverter Radiation Fin Temperature Rise Abnormality Applicable All outside unit models Models Error Code Method of Error Fin temperature is detected by the thermistor of the radiation fin. Detection Error Decision When the temperature of the inverter radiation fin reaches A °C (B °F) or more (1) Conditions Supposed ...

  • Page 388: Compressor Instantaneous Overcurrent

    Troubleshooting by Error Code SiUS301716EE 3.49 Compressor Instantaneous Overcurrent Applicable All outside unit models Models Error Code Method of Error Detect current flowing through the power transistor. Detection Error Decision When overcurrent flows instantaneously through the power transistor. Conditions Supposed ...
  • Page 389 SiUS301716EE Troubleshooting by Error Code Power OFF CHECK 4 Is the power Replace the inverter transistor normal? PCB (A3P). Restarting the system results in Continue operation. the recurrence of The error could have the error. resulted from causes such as instantaneous power failure.

  • Page 390: Compressor Overcurrent

    Troubleshooting by Error Code SiUS301716EE 3.50 Compressor Overcurrent Applicable All outside unit models Models Error Code Method of Error Detect current flowing through the power transistor. Detection Error Decision When the secondary-side inverter current exceeds a certain value. Conditions Supposed ...
  • Page 391 SiUS301716EE Troubleshooting by Error Code Power OFF CHECK 4 Is the power Replace the inverter transistor normal? PCB (A3P). Restarting the system results Continue operation. in the recurrence of the error. The error could have resulted from causes such as instantaneous power failure.

  • Page 392: Compressor Startup Abnormality

    Troubleshooting by Error Code SiUS301716EE 3.51 Compressor Startup Abnormality Applicable All outside unit models Models Error Code Method of Error Detect error according to the signal waveform of compressor. Detection Error Decision When compressor startup operation has not been completed. Conditions Supposed ...
  • Page 393 SiUS301716EE Troubleshooting by Error Code Refrigerant is stagnated. (No power Solve the refrigerant stagnation. applied for a period of 6 (Power should be supplied for more hours or more) than 6 hours.) Is the insulation resistance of the Replace the compressor (M1C). relevant compressor 100 k: or more? There is wiring...

  • Page 394: Transmission Error Between Inverter Pcb And Outside Unit Main Pcb

    Troubleshooting by Error Code SiUS301716EE 3.52 Transmission Error between Inverter PCB and Outside Unit Main PCB Applicable All outside unit models Models Error Code Method of Error Check for the transmission conditions between the inverter PCB (A3P) and the outside unit main Detection PCB (A1P) and sub PCB (A4P) using a microcomputer.
  • Page 395 SiUS301716EE Troubleshooting by Error Code The service monitor (green) on the This is not the LC error. outside unit main PCB Recheck the error code. (A1P) is blinking. The service The fuse of monitor (green) on the the noise filter PCB Replace the inverter PCB (A3P).

  • Page 396: Power Supply Voltage Imbalance

    Troubleshooting by Error Code SiUS301716EE 3.53 Power Supply Voltage Imbalance Applicable All outside unit models Models Error Code Method of Error Detect voltage imbalance through inverter PCB. Detection Error Decision When power supply voltage imbalance exceeds approximately 12 V. Conditions Error is not decided while the unit operation is continued.
  • Page 397 Use the document “Notice of Inspection Results” attached to spare part. Explanation to users Be sure to explain user that “power supply Hand the “Notice of Inspection Results” to user to ask voltage imbalance” will occur and Daikin him/her to rectify the imbalance. accepts no responsibility for the imbalance. Note(s) 1.

  • Page 398: Reactor Temperature Abnormality

    Troubleshooting by Error Code SiUS301716EE 3.54 Reactor Temperature Abnormality Applicable 208/230 V units (RWEQ96/120/144TATJU, RWEQ96/120/144TATJA, Models RWEQ72/96/120/144TBTJA) Error Code Method of Error Detect according to the value detected with the reactor surface thermistor. Detection Error Decision When the system is in operation and the thermistor causes wiring disconnection or short circuit in it. Conditions Supposed ...

  • Page 399: Inverter Radiation Fin Temperature Abnormality

    SiUS301716EE Troubleshooting by Error Code 3.55 Inverter Radiation Fin Temperature Abnormality Applicable All outside unit models Models Error Code Method of Error Resistance of radiation fin thermistor is detected when the compressor is not operating. Detection Error Decision When the resistance value of thermistor becomes a value equivalent to open circuited or short Conditions circuited status Error is not decided while the unit operation is continued.

  • Page 400: Field Setting Abnormality After Replacing Outside Unit Main Pcb Or Combination Of Pcb Abnormality

    Troubleshooting by Error Code SiUS301716EE 3.56 Field Setting Abnormality after Replacing Outside Unit Main PCB or Combination of PCB Abnormality Applicable All outside unit models Models Error Code Method of Error This error is detected according to communications with the inverter PCB. Detection Error Decision Make judgment according to communication data on whether or not the type of the inverter PCB is...

  • Page 401: Refrigerant Shortage Alert

    SiUS301716EE Troubleshooting by Error Code 3.57 Refrigerant Shortage Alert Applicable All outside unit models Models Error Code Method of Error Detect refrigerant shortage based on the temperature difference between low pressure equivalent Detection saturation temperature or suction pipe and heat exchanger temperature. Error Decision Low pressure becomes 0.25 MPa (36.0 psi) or less for more than 30 minutes.

  • Page 402: Reverse Phase, Open Phase

    Troubleshooting by Error Code SiUS301716EE 3.58 Reverse Phase, Open Phase Applicable 208/230 V units (RWEQ96/120/144TATJU, RWEQ96/120/144TATJA, Models RWEQ72/96/120/144TBTJA) 460 V units (RWEQ96/120/144TAYDU, RWEQ96/120/144TAYDA, RWEQ72/96/120/144TBYDA) Error Code Method of Error The phase of each phase are detected by reverse phase detection circuit and right phase or Detection reverse phase are judged.

  • Page 403: Power Supply Insufficient Or Instantaneous Failure

    SiUS301716EE Troubleshooting by Error Code 3.59 Power Supply Insufficient or Instantaneous Failure Applicable All outside unit models Models Error Code Method of Error Detection of voltage of main circuit capacitor built in the inverter PCB and power supply voltage Detection Error Decision For 208/230 V units: When the voltage aforementioned is 190 V or less Conditions...
  • Page 404 Troubleshooting by Error Code SiUS301716EE Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check if power supply voltage is 208/230 V ± Correct the power 10%, 460 V ± 10% or supply voltage.

  • Page 405: Check Operation Not Executed

    SiUS301716EE Troubleshooting by Error Code 3.60 Check Operation Not Executed Applicable All outside unit models Models Error Code Method of Error The check operation has not been executed. Detection Error Decision Error is decided when the unit starts operation without check operation. Conditions Supposed Check operation not executed.

  • Page 406: Transmission Error Between Indoor Units And Outside Units, Open Phase In Power Supply Wiring

    Troubleshooting by Error Code SiUS301716EE 3.61 Transmission Error between Indoor Units and Outside Units, Open Phase in Power Supply Wiring Applicable All indoor unit models Models All outside unit models Error Code Method of Error Microcomputer checks if transmission between indoor and outside units is normal. Detection Error Decision Transmission is not carried out normally for a certain amount of time...
  • Page 407 SiUS301716EE Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check for details of error in monitor mode. U4-01 Go to the next page. U4-03 (Indoor unit system transmission error) Check the power supply wiring.
  • Page 408 Troubleshooting by Error Code SiUS301716EE Are the indoor-outside and outside-outside Modify the transmission transmission wirings wirings. normal? Disconnect the outside-outside transmission wiring. Replace the outside unit main Does the system normally PCB (A1P). operate with a single transmission line? Mount the DIII-NET extension adaptor.

  • Page 409: Transmission Error Between Remote Controller And Indoor Unit

    SiUS301716EE Troubleshooting by Error Code 3.62 Transmission Error between Remote Controller and Indoor Unit Applicable All indoor unit models Models Error Code Method of Error Microcomputer checks if transmission between indoor unit and remote controller is normal. Detection Error Decision Transmission is not carried out normally for a certain amount of time.

  • Page 410: Transmission Error Between Outside Units

    Troubleshooting by Error Code SiUS301716EE 3.63 Transmission Error between Outside Units Applicable All outside unit models Models Error Code Method of Error Microcomputer checks if transmission between outside units is normal. Detection Error Decision When transmission is not carried out normally for a certain amount of time Conditions Supposed ...
  • Page 411 SiUS301716EE Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Ensure the sub code or the lamp display of monitor mode, and then go to the following: U7-01 Error code Sub code...
  • Page 412 Troubleshooting by Error Code SiUS301716EE Diagnosis Flowchart-1 U7-01 Error code Sub code (Transmission error when the external control adaptor is mounted) there any wiring disconnection or wiring error in the transmission Modify the transmission wirings wirings to the external to the external control adaptor for control adaptor for outside unit.
  • Page 413 SiUS301716EE Troubleshooting by Error Code Diagnosis Flowchart-2 U7-02 Error code Sub code (Transmission error when the external control adaptor for outside unit is mounted) Unified Cool/Heat Set Cool/Heat selection selection for the external control adaptor for outside unit to “IND.” Cool/Heat selection for the external control adaptor...
  • Page 414 Troubleshooting by Error Code SiUS301716EE Diagnosis Flowchart-3 U7-03 Error code Sub code (Transmission error between master and slave 1) multi transmission wirings to multi slave 1 have Replace the outside unit main caused wiring disconnection in them or are being PCB (A1P) for multi slave 1.
  • Page 415 SiUS301716EE Troubleshooting by Error Code Diagnosis Flowchart-6 U7-06 Error code Sub code (Manual address setting error for slave 1, 2) One of outside unit multi transmission wirings has Replace the outside unit main PCB caused wiring disconnection in it (A1P). or been disconnected.

  • Page 416: Transmission Error Between Main And Sub Remote Controllers

    Troubleshooting by Error Code SiUS301716EE 3.64 Transmission Error between Main and Sub Remote Controllers Applicable All indoor unit models Models Error Code Method of Error In case of controlling with 2 remote controllers, check the system using microcomputer if signal Detection transmission between indoor unit and remote controller (main and sub remote controller) is normal.

  • Page 417: Transmission Error Between Indoor And Outside Units In The Same System

    SiUS301716EE Troubleshooting by Error Code 3.65 Transmission Error between Indoor and Outside Units in the Same System Applicable All indoor unit models Models All outside unit models Error Code Method of Error Detect the error signal for the other indoor unit within the circuit by outside unit PCB. Detection Error Decision When the error decision is made on any other indoor unit within the system concerned...

  • Page 418: Improper Combination Of Indoor, Branch Selector And Outside Units

    Troubleshooting by Error Code SiUS301716EE 3.66 Improper Combination of Indoor, Branch Selector and Outside Units Applicable All indoor unit models Models Branch Selector unit All outside unit models Error Code Method of Error  A difference occurs in data by the type of refrigerant between indoor, Branch Selector and Detection outside units.
  • Page 419 SiUS301716EE Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Ensure the sub code or the lamp display of monitor mode, and then go to the following: UA-17 Error code Sub code...
  • Page 420 Troubleshooting by Error Code SiUS301716EE UA-39 Error code Sub code Go to Diagnosis Flowchart-10. (Wrong connection) UA-43 Error code Sub code Go to Diagnosis Flowchart-11. (Wrong connection) UA-50 Error code Sub code Go to Diagnosis Flowchart-12. (Wrong connection) UA-51 Error code Sub code Go to Diagnosis Flowchart-13.
  • Page 421 SiUS301716EE Troubleshooting by Error Code Diagnosis Flowchart-1 UA-17 Error code Sub code Is the number of indoor model of indoor units connected to the Replace the outside unit main unit FXTQ-TA or same system is less PCB (A1P). FXTQ-TB? than 64. Incorrect electric heater capacity setting...
  • Page 422 Troubleshooting by Error Code SiUS301716EE Diagnosis Flowchart-3 UA-20 Error code Sub code Multi connection? Replace the outside unit main PCB (A1P). Was the different model outside unit PCB Replace the outside unit main PCB of outside unit is replaced with a spare (A1P).
  • Page 423 SiUS301716EE Troubleshooting by Error Code Diagnosis Flowchart-5 UA-25 Error code Sub code Is the wiring between outside unit Correct the wiring. and Branch Selector unit correct? Replace the outside unit main PCB (A1P). Diagnosis Flowchart-6 UA-26 Error code Sub code Is the wiring between Branch Selector Correct the wiring.
  • Page 424 Troubleshooting by Error Code SiUS301716EE Diagnosis Flowchart-8 UA-28 Error code Sub code Is the correct model of Connect the correct model. Branch Selector unit connected? Replace the outside unit main PCB (A1P). Diagnosis Flowchart-9 UA-31 Error code Sub code Is the multi combination of Correct the multi combination of outside units...
  • Page 425 SiUS301716EE Troubleshooting by Error Code Diagnosis Flowchart-11 UA-43 Error code Sub code H/P system and Revise the connection. HT hydro unit is connected. hydro unit is connected in the Revise the connection. Branch Selector unit downstream. system and LT hydro unit are Revise the connection.
  • Page 426 Troubleshooting by Error Code SiUS301716EE Diagnosis Flowchart-14 UA-53 Error code Sub code Is the DIP switch of the After turning OFF the power supply Multi Branch Selector unit of the Multi Branch Selector unit, correct? correct the DIP switch settings. Turn ON the power supply of the Multi Branch Selector unit, and press the RETURN (BS3) button...

  • Page 427: Incorrect Electric Heater Capacity Setting

    SiUS301716EE Troubleshooting by Error Code 3.67 Incorrect Electric Heater Capacity Setting Applicable FXTQ-TA, FXTQ-TB Models UA-17 Error Code Outline After attaching optional electric heater, if the electric heater capacity setting (11 (21)-5) is made mistakenly for heaters not featured in the lineup, heating via unintended levels of airflow will be prevented.

  • Page 428: Address Duplication Of Centralized Controller

    Troubleshooting by Error Code SiUS301716EE 3.68 Address Duplication of Centralized Controller Applicable All indoor unit models Models Centralized controller Error Code Method of Error The principal indoor unit detects the same address as that of its own on any other indoor unit. Detection Error Decision The error decision is made as soon as the abnormality aforementioned is detected.

  • Page 429: Transmission Error Between Centralized Controller And Indoor Unit

    SiUS301716EE Troubleshooting by Error Code 3.69 Transmission Error between Centralized Controller and Indoor Unit Applicable All indoor unit models Models Centralized controller Schedule timer intelligent Touch Controller Error Code Method of Error Microcomputer checks if transmission between indoor unit and centralized controller is normal. Detection Error Decision When transmission is not carried out normally for a certain amount of time...
  • Page 430 Troubleshooting by Error Code SiUS301716EE Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the indoor unit for which UE is displayed. Is the transmission Go to the next page. error UE caused on all indoor units? Is the...
  • Page 431 SiUS301716EE Troubleshooting by Error Code Check the transmission wiring between centralized controller for Correct the wiring. any broken wire. CHECK 15 Check the transmission wiring between main centralized Correct the wiring. controller for any broken wire. CHECK 15 Has the main centralized controller setting connector Correct the connection of the...

  • Page 432: System Not Set Yet

    Troubleshooting by Error Code SiUS301716EE 3.70 System Not Set Yet Applicable All indoor unit models Models All outside unit models Error Code Method of Error On check operation, the number of indoor units in terms of transmission is not corresponding to that Detection of indoor units that have made changes in temperature.

  • Page 433: System Abnormality, Refrigerant System Address Undefined

    SiUS301716EE Troubleshooting by Error Code 3.71 System Abnormality, Refrigerant System Address Undefined Applicable All indoor unit models Models All outside unit models Error Code Method of Error System detects an indoor unit whose address is not defined by automatic address function. Detection *Automatic address refers to the automatic designated address of indoor unit and outside unit when connected to the power after installation or wiring replacement (with the RETURN (BS3) button...
  • Page 434 Troubleshooting by Error Code SiUS301716EE Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Does electricity an error being introduce occur even after 12 for the first time after minutes elapses from the Normal installation or after an...

  • Page 435: Check

    SiUS301716EE Check 4. Check High Pressure Check CHECK 1 Referring to the Fault Tree Analysis (FTA) shown below, probe the defective points. Stop valve closed  Check to be sure the stop valve is open. Local High pipe  Conduct visual checks for pipe conditions. pressure Bent or crashed pipe resistance...
  • Page 436 Check SiUS301716EE 2. In heating, the indoor unit electronic expansion valve is used for subcooling degree control. (For details, refer to Electronic Expansion Valve Control.) Reference CHECK 6 Refer to page 437. Part 6 Service Diagnosis...

  • Page 437: Low Pressure Check

    SiUS301716EE Check Low Pressure Check CHECK 2 Referring to the Fault Tree Analysis (FTA) shown below, probe the defective points. [In cooling]  Is the pressure value checked with the Service Checker Defective low pressure sensor (See 1.) Defective corresponding to the measurement of the pressure sensor? compressor Defective low ...
  • Page 438 Check SiUS301716EE Note(s) 1. For details of the compressor capacity control while in cooling, refer to Compressor PI Control. 2. The low pressure protection control includes low pressure protection control and hot gas bypass control. 3. In cooling, the indoor unit electronic expansion valve is used for superheating degree control. 4.

  • Page 439: Superheat Operation Check

    SiUS301716EE Check Superheat Operation Check CHECK 3 Identify the defective points referring to the defective factor analysis (FTA) as follows. Hot gas circuit clogging Defective hot Defective solenoid gas bypass m Check if coil resistance and insulation valve coil control are normal.
  • Page 440 Check SiUS301716EE 3. “Superheating temperature control” in cooling mode is conducted by indoor unit electronic expansion valve. 4. Superheating temperature control in heating mode is conducted by outside unit electronic expansion valve (EVM). 5. Judgment criteria of superheat operation: (1) Suction gas superheating temperature: 10 degrees and over. (2) Discharge gas superheating temperature: 45 degrees and over, except for immediately after starting and drooping control, etc.

  • Page 441: Power Transistor Check

    SiUS301716EE Check Power Transistor Check CHECK 4 Perform the following procedures prior to check. (1) Power OFF. (2) Remove all the wiring connected to the PCB where power transistors are mounted on. Preparation h Multimeter  Prepare the analog type of multimeter. For the digital type of multimeter, those with diode check function are available for the checking.

  • Page 442: Wet Operation Check

    Check SiUS301716EE Wet Operation Check CHECK 5 Referring to the Fault Tree Analysis (FTA) shown below, identify defective points. Defective crankcase heater Refrigerant accumulation Frequent ON/OFF of compressor m Refer to information in the CHECK 6 Overcharge of refrigerant section. m Does the valve coil have normal Defective valve coil Defective indoor...
  • Page 443 SiUS301716EE Check Guideline of superheating degree to judge as wet operation  (1) Suction gas superheating degree: Less than 3°C (5.4°F); (2) Discharge gas superheating degree: Less than 15°C (27°F), except immediately after compressor starts up or is running under drooping control. (Use the values shown above as a guideline.

  • Page 444: Refrigerant Overcharge Check

    Check SiUS301716EE Refrigerant Overcharge Check CHECK 6 In case of VRV Systems, the only way to judge as the overcharge of refrigerant is with operating conditions due to the relationship to pressure control and electronic expansion valve control. As information for making a judgement, refer to the information below. Diagnosis of refrigerant overcharge 1.

  • Page 445: Refrigerant Shortage Check

    SiUS301716EE Check Refrigerant Shortage Check CHECK 7 In case of VRV Systems, the only way to judge as the shortage of refrigerant is with operating conditions due to the relationship to pressure control and electronic expansion valve control. As information for making a judgement, refer to the information below. Diagnosis of shortage of refrigerant 1.

  • Page 446: Vacuuming And Dehydration Procedure

    Check SiUS301716EE Vacuuming and Dehydration Procedure CHECK 8 Conduct vacuuming and dehydration in the piping system following the procedure for Normal vacuuming and dehydration described below. Furthermore, if moisture may get mixed in the piping system, follow the procedure for Special vacuuming and dehydration described below.

  • Page 447: Thermistor Check

    SiUS301716EE Check Thermistor Check CHECK 11 Thermistor type of indoor units Indoor heat Indoor heat Suction air Discharge air exchanger (liquid) exchanger (gas) thermistor thermistor Model thermistor thermistor FXFQ-AA Type A — Type C FXFQ-T — Type J FXFQ-P Type D —...
  • Page 448 Check SiUS301716EE Thermistor temperature Resistance (k) (°C) (°F) Type A Type B Type C Type D –30 –22 363.8 — – 336.7 –25 –13 266.8 — – 253.1 –20 –4 197.8 — – 191.2 –15 148.2 — – 144.1 –10 112.0 111.1 111.8...
  • Page 449 SiUS301716EE Check Thermistor temperature Resistance (k) (°C) (°F) Type H Type J Type K –30 –22 3407 352.1 350.6 –25 –13 2540 261.2 257.4 –20 –4 1910 195.4 191.0 –15 1449 147.3 143.2 –10 1108 111.8 108.4 –5 853.8 85.49 82.83 662.7 65.80...

  • Page 450: Pressure Sensor Check

    Check SiUS301716EE 4.10 Pressure Sensor Check CHECK 12 Detected Pressure 4.15 4.15 (MPa) = × V – × 0.5 (psi) (kg/cm (MPa) (MPa) = × V – × 0.5 51.0 1 MPa = 145 psi : High pressure (MPa) 45.9 High Pressure (P : Low pressure (MPa) : Output Voltage (High Side) (VDC)

  • Page 451: Broken Wire Check Of The Relay Wires

    SiUS301716EE Check 4.11 Broken Wire Check of the Relay Wires CHECK 15 1. Procedure for checking outside-outside unit transmission wiring for broken wires On the system shown below, turn OFF the power supply to all equipment, short circuit between the outside-outside unit terminal F1 and F2 in the outside unit A that is farthest from the central remote controller, and then conduct continuity checks between the transmission wiring terminal blocks F1 and F2 of the central remote controller using a multimeter.
  • Page 452 Check SiUS301716EE 2. Procedure for checking indoor-outside unit transmission wiring for broken wires (for checking the indoor-outside unit transmission wiring of the outside unit C for broken wires) Turn OFF the power supply to all equipment, short circuit between the indoor-outside unit terminal F1 and F2 in the outside unit C, and then conduct continuity checks between the transmission wirings F1 and F2 of the indoor unit a that is farthest from the outside unit C using a multimeter.

  • Page 453: Fan Motor Connector Check (Power Supply Cable)

    SiUS301716EE Check 4.12 Fan Motor Connector Check (Power Supply Cable) CHECK 16 Check the fan motor connector according to the following procedure. Indoor Unit FXFQ-AA 1. Turn the power supply OFF. 2. Disconnect the fan motor connector from the PCB and measure the resistances between U-V, V-W and W-U.

  • Page 454: Fan Motor Connector Check (Signal Cable)

    Check SiUS301716EE FXMQ-TA Measurement of power wire connector. Remove the X1A connector from the fan PCB (A2P) and measure the resistance between the U and V, V and W, and W and U phases of the motor connector (with five conductors) and check that each phase are balanced (within a permissible dispersion range of ±20%) Connector power wire use (X1A) White...
  • Page 455 SiUS301716EE Check FXEQ-P, FXUQ-PA — (1) — White (2) Orange (3) Brown (4) Blue (5) — (6) — — (7) — Red (8) Measuring points Judgment criteria 2 - 5 1  or more 3 - 5 1  or more 4 - 5 1 ...

  • Page 456: Electronic Expansion Valve Coil Check

    Check SiUS301716EE 4.14 Electronic Expansion Valve Coil Check CHECK 18 Measure the connector pin-to-pin resistance and make sure that the resistance value is within the range listed in the table below. Determine the type according to the connector wire color and measure the resistance. Outside Unit White (1) Yellow (2)
  • Page 457 SiUS301716EE Check Branch Selector unit (EVSC) White (1) White (1) White Yellow (2) Yellow (2) Orange (3) Orange (3) Orange Blue (4) Blue (4) — (5) Red (5) Yellow — Blue Red (6) Measuring points Judgment criteria White - Red Yellow - Red 35-55 ...
  • Page 458 Check SiUS301716EE Indoor Unit FXFQ-AA, FXFQ-T, FXFQ-P, FXZQ-TA, FXZQ-TB, FXUQ-P, FXUQ-PA, FXEQ-P, FXSQ-TA, FXSQ-TB, FXMQ-TB, FXTQ-TA, FXTQ-TB Orange (1) Red (2) Yellow (3) Black (4) — (5) Gray (6) Measuring points Judgment criteria 1 - 6 2 - 6 35-55  3 - 6 4 - 6 FXZQ-M, FXMQ-PB, FXAQ-P...
  • Page 459 SiUS301716EE Check FXMQ-TA White (1) White (1) Yellow (2) Red (6) Orange (3) Orange (3) Blue (4) — (5) Yellow Blue Red (6) Measuring points Judgment criteria 1 - 2 No continuity 1 - 3 300  1 - 6 150 ...

  • Page 460: Fan Motor Connector Check For Fxtq-Ta, Fxtq-Tb

    Check SiUS301716EE 4.15 Fan Motor Connector Check for FXTQ-TA, FXTQ-TB CHECK 19 CHECKING EMERSON ULTRATECH ECM MOTORS The FXTQ-TA and FXTQ-TB models utilize an Emerson, 4-wire variable speed ECM blower motor. The ECM blower motor provides constant CFM. The motor is a serially communicating variable speed motor. Only four wires are required to control the motor: +Vdc, Common, Receive, and Transmit.
  • Page 461 SiUS301716EE Check The green LED on the diagnostic tool will blink indicating communications between the tool and motor. See table below for indications of tool indicators and motor actions. Replace or repair as needed. Power Green Motor Indication(s) Button Action Confirm 24VAC to UltraCheck-EZ tool.
  • Page 462 Check SiUS301716EE Electrical Checks - Low Voltage Control Circuits Turn on power to air handler or modular. Warning Line Voltage now present. Check voltage between pins on the 4-wire motor control harness between the motor and control board. Voltage on pins should read: Pins 1 to 4 = 3.3vdc Pins 1 to 2 = 3.3vdc Pins 3 to 4 = 15vdc...

  • Page 463: Motor Checks

    SiUS301716EE Check Locate the 3-circuit connector in the control/end bell. Using an ohmmeter, check the resistance between each terminal in the connector. If the resistance is 1 M or greater, the control/end bell is functioning properly. Replace the control/end bell if the resistance is lower than 1 M.
  • Page 464 SiUS301716EE Part 7 Appendix 1. Wiring Diagrams..................458 1.1 Outside Unit....................458 1.2 Branch Selector Unit ................464 1.3 Indoor Unit....................473 1.4 Air Treatment Equipment ................. 496 Part 7 Appendix...

  • Page 465: Wiring Diagrams

    SiUS301716EE Wiring Diagrams 1. Wiring Diagrams Outside Unit RWEQ96/120/144TATJU, RWEQ96/120/144TATJA, RWEQ72/96/120/144TBTJA Part 7 Appendix...
  • Page 466 Wiring Diagrams SiUS301716EE Part 7 Appendix...
  • Page 467 SiUS301716EE Wiring Diagrams RWEQ96/120/144TAYDU, RWEQ96/120/144TAYDA, RWEQ72/96/120/144TBYDA Part 7 Appendix...
  • Page 468 Wiring Diagrams SiUS301716EE Part 7 Appendix...
  • Page 469 SiUS301716EE Wiring Diagrams RWEQ96/120/144TAYCU, RWEQ72/96/120/144TBYCU Part 7 Appendix...
  • Page 470 Wiring Diagrams SiUS301716EE Part 7 Appendix...

  • Page 471: Branch Selector Unit

    SiUS301716EE Wiring Diagrams Branch Selector Unit 1.2.1 Single Branch Selector Unit BSQ36/60/96TVJ Part 7 Appendix...
  • Page 472 Wiring Diagrams SiUS301716EE BSQ36/60/96TAVJ Part 7 Appendix...
  • Page 473 SiUS301716EE Wiring Diagrams 1.2.2 Multi Branch Selector Unit (Standard Series) BS4Q54TVJ Part 7 Appendix...
  • Page 474 Wiring Diagrams SiUS301716EE BS4Q54TAVJ Part 7 Appendix...
  • Page 475 SiUS301716EE Wiring Diagrams BS6/8Q54TVJ Part 7 Appendix...
  • Page 476 Wiring Diagrams SiUS301716EE BS10/12Q54TVJ Part 7 Appendix...
  • Page 477 SiUS301716EE Wiring Diagrams BS10/12Q54TAVJ Part 7 Appendix...
  • Page 478 Wiring Diagrams SiUS301716EE 1.2.3 Multi Branch Selector Unit (Flex Series) BSF4Q54TVJ 3D123904B Part 7 Appendix...
  • Page 479 SiUS301716EE Wiring Diagrams BSF6/8Q54TVJ Part 7 Appendix...

  • Page 480: Indoor Unit

    Wiring Diagrams SiUS301716EE Indoor Unit FXFQ07/09/12/15/18/24/30/36/48/54AAVJU Part 7 Appendix...
  • Page 481 SiUS301716EE Wiring Diagrams BYCQ54EEGFU (Self-Cleaning Decoration Panel for FXFQ-AA) Part 7 Appendix...
  • Page 482 Wiring Diagrams SiUS301716EE FXFQ07/09/12/15/18/24/30/36/48TVJU Part 7 Appendix...
  • Page 483 SiUS301716EE Wiring Diagrams BYCQ125BGW1 (Self-Cleaning Decoration Panel for FXFQ-T) Part 7 Appendix...
  • Page 484 Wiring Diagrams SiUS301716EE FXFQ09/12/18/24/30/36/48PVJU Part 7 Appendix...
  • Page 485 SiUS301716EE Wiring Diagrams FXZQ05/07/09/12/15/18TAVJU Part 7 Appendix...
  • Page 486 Wiring Diagrams SiUS301716EE FXZQ05/07/09/12/15/18TBVJU Part 7 Appendix...
  • Page 487 SiUS301716EE Wiring Diagrams FXZQ07/09/12/15/18MVJU9 Part 7 Appendix...
  • Page 488 Wiring Diagrams SiUS301716EE FXUQ18/24/30/36PVJU Part 7 Appendix...
  • Page 489 SiUS301716EE Wiring Diagrams FXUQ18/24/30/36PAVJU Part 7 Appendix...
  • Page 490 Wiring Diagrams SiUS301716EE FXEQ07/09/12/15/18/24PVJU Part 7 Appendix...
  • Page 491 SiUS301716EE Wiring Diagrams FXDQ07/09/12/18/24MVJU Part 7 Appendix...
  • Page 492 Wiring Diagrams SiUS301716EE FXSQ05/07/09/12/15/18/24/30/36/48/54TAVJU Part 7 Appendix...
  • Page 493 SiUS301716EE Wiring Diagrams FXSQ05/07/09/12/15/18/24/30/36/48/54TBVJU Part 7 Appendix...
  • Page 494 Wiring Diagrams SiUS301716EE FXMQ07/09/12/15/18/24/30/36/48/54PBVJU Part 7 Appendix...
  • Page 495 SiUS301716EE Wiring Diagrams FXMQ15/18/24/30/36/48/54TBVJU Part 7 Appendix...
  • Page 496 Wiring Diagrams SiUS301716EE FXMQ72/96TAVJU Part 7 Appendix...
  • Page 497 SiUS301716EE Wiring Diagrams FXMQ72/96MVJU Part 7 Appendix...
  • Page 498 Wiring Diagrams SiUS301716EE FXHQ12/24/36MVJU Part 7 Appendix...
  • Page 499 SiUS301716EE Wiring Diagrams FXAQ07/09/12/18/24PVJU Part 7 Appendix...
  • Page 500 Wiring Diagrams SiUS301716EE FXLQ07/09/12/18/24MVJU, FXNQ07/09/12/18/24MVJU Part 7 Appendix...
  • Page 501 SiUS301716EE Wiring Diagrams FXTQ09/12/18/24/30/36/42/48/54/60TAVJUA, FXTQ09/12/18/24/30/36/42/48/54/60TAVJUD (SEE NOTE 4) 208/230 (SEE NOTE 8) GROUND LUG HEATER KIT (SEE NOTE 5) INSTALLING AUX ALARM (ALARM) DISCONNECT SWITCH WIRING (SEE NOTE 6) (SEE NOTE 8) (SEE NOTE 1) (SEE NOTE 1) 24VAC 24VAC 10 11 12 RELAY IN (ACC-IN)
  • Page 502 Wiring Diagrams SiUS301716EE FXTQ09/12/18/24/30/36/42/48/54/60TBVJUA, FXTQ09/12/18/24/30/36/42/48/54/60TBVJUD (SEE NOTE 4) 208/230 (SEE NOTE 8) GROUND LUG HEATER KIT 208/230 VAC (SEE NOTE 5) INSTALLING AUX ALARM (ALARM) DISCONNECT SWITCH WIRING (SEE NOTE 6) (SEE NOTE 8) (SEE NOTE 1 & 9) (SEE NOTE 1 & 9) 24VAC 24VAC 10 11 12...

  • Page 503: Air Treatment Equipment

    SiUS301716EE Wiring Diagrams Air Treatment Equipment 1.4.1 Outdoor-Air Processing Unit FXMQ48/72/96MFVJU Part 7 Appendix...
  • Page 504 Wiring Diagrams SiUS301716EE 1.4.2 Energy Recovery Ventilator (VAM Series) VAM300/470/600GVJU Part 7 Appendix...
  • Page 505 SiUS301716EE Wiring Diagrams VAM1200GVJU Part 7 Appendix...
  • Page 506 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. z Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

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