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Daikin REYQ72-456XATJU Service Manual

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SiUS371901EB
Service
Manual
REYQ72-456XATJU(A)
REYQ72-456XAYDU(A)
REYQ72-432XAYCU(A)
Heat Recovery 60 Hz

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Summary of Contents for Daikin REYQ72-456XATJU

  • Page 1 SiUS371901EB Service Manual REYQ72-456XATJU(A) REYQ72-456XAYDU(A) REYQ72-432XAYCU(A) Heat Recovery 60 Hz...

  • Page 2: Table Of Contents

    SiUS371901EB 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. Model Names ....................10 1.1 Indoor Unit....................
  • Page 3 SiUS371901EB 3.6 Oil Return Operation at Simultaneous Cooling and Heating Operation ..96 Part 3 Remote Controller ..............97 1. Applicable Models ..................98 2. Names and Functions ................99 2.1 BRC1E73 ....................99 2.2 BRC1H71W....................102 2.3 Wireless Remote Controller ..............110 3.
  • Page 4 SiUS371901EB 6.2 Low Pressure Protection Control.............. 144 6.3 Discharge Pipe Protection Control ............145 6.4 Compressor Body Protection Control............146 6.5 Inverter Protection Control ............... 146 7. Special Control..................148 7.1 Pump Down Residual Operation .............. 148 7.2 Oil Return Operation ................149 7.3 Defrost Operation ..................
  • Page 5 SiUS371901EB 2.7 Night-Time Low Noise Operation and Demand Operation....... 253 3. Field Settings for Branch Selector Unit ...........258 3.1 Field Settings for Single Branch Selector Unit ......... 258 3.2 Field Settings for Multi Branch Selector Unit (Standard Series)....259 3.3 Field Settings for Multi Branch Selector Unit (Flex Series) ...... 260 3.4 How to Check Miswiring for Multi Branch Selector Unit ......
  • Page 6 SiUS371901EB 3.26 Remote Sensor Abnormality ..............321 3.27 Humidity Sensor System Abnormality ............322 3.28 Infrared Presence/Floor Sensor Error ............323 3.29 Remote Controller Thermistor Abnormality ..........328 3.30 Outdoor Unit Main PCB Abnormality............329 3.31 Detection of Ground Leakage by Leak Detection Circuit ......330 3.32 Missing of Ground Leakage Detection Core ..........
  • Page 7 SiUS371901EB 3.71 Incorrect Gas Furnace Connecting Number..........405 3.72 Incorrect Electric Heater Capacity Setting..........406 3.73 Address Duplication of Centralized Controller.......... 407 3.74 Transmission Error between Centralized Controller and Indoor Unit ..408 3.75 System Not Set Yet .................. 411 3.76 System Abnormality, Refrigerant System Address Undefined ....

  • Page 8: Introduction

    SiUS371901EB 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: Safety Cautions

    SiUS371901EB 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 SiUS371901EB 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

    SiUS371901EB 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 SiUS371901EB 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 SiUS371901EB Safety Cautions Caution Be sure to measure insulation resistance after the repair, and make sure that the resistance is 1 MΩ 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 SiUS371901EB 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

    SiUS371901EB Revision History 3. Revision History Month / Year Version Revised contents 12 / 2018 SiUS371901E First edition Model addition: 03 / 2020 SiUS371901EA REYQ72-456XATJA, REYQ72-456XAYDA, REYQ72-432XAYCA Model addition: 02 / 2021 SiUS371901EB BSF4-8Q54TVJ, BRC1H71W Introduction...

  • Page 16: Part 1 General Information

    SiUS371901EB Part 1 General Information 1. Model Names ....................10 1.1 Indoor Unit....................10 1.2 Outdoor Unit ....................11 1.3 Air Treatment Equipment ................12 1.4 Branch Selector Unit .................. 12 2. External Appearance.................13 2.1 Indoor Unit....................13 2.2 Outdoor Unit ....................14 2.3 Air Treatment Equipment ................

  • Page 17: Model Names

    SiUS371901EB Model Names 1. Model Names Indoor Unit Capacity range (ton) 1.25 Power supply, Capacity index Standard Ceiling mounted cassette FXFQ — — — — — — — (Round flow with sensing) type VISTA 2'×2' FXZQ 05TA 07TA 09TA 12TA 15TA 18TA —...

  • Page 18: Outdoor Unit

    Model Names SiUS371901EB Outdoor Unit REYQ-XATJU(A) (208/230 V) Capacity range (ton) Power supply, Standard Capacity index Heat recovery REYQ 72XA 96XA 120XA 144XA 168XA 192XA Capacity range (ton) Power supply, Standard Capacity index Heat recovery REYQ 216XA 240XA 264XA 288XA 312XA 336XA Capacity range (ton)

  • Page 19: Air Treatment Equipment

    SiUS371901EB Model Names Air Treatment Equipment Outdoor-Air Processing Unit Power supply, Series Model name Standard FXMQ 48MF 72MF 96MF VJU* Energy Recovery Ventilator (VAM series) Power supply, Series Model name Standard 300G 470G 600G 1200G VJU* VJ: 1 phase, 208/230 V, 60 Hz U: Standard symbol Branch Selector Unit Single Branch Selector Unit...

  • Page 20: External Appearance

    External Appearance SiUS371901EB 2. External Appearance Indoor Unit Ceiling mounted cassette (Round flow with sensing) type Ceiling mounted duct type FXFQ-T FXMQ-M Shown with BYCQ125B-W1 VISTA 2'×2' cassette type Ceiling suspended type FXZQ-TA FXHQ-M Shown with BYFQ60C3W1W Shown with BYFQ60C3W1S 4 way blow ceiling suspended type Wall mounted type FXUQ-P...

  • Page 21: Outdoor Unit

    SiUS371901EB External Appearance Outdoor Unit Single Outdoor Unit REYQ72/96/120/144/168XATJU(A) REYQ72/96/120/144/168XAYDU(A) REYQ72/96/120/144/168XAYCU(A) Double Outdoor Unit REYQ192/216/240/264/288/312/336XATJU(A) REYQ192/216/240/264/288/312/336XAYDU(A) REYQ192/216/240/264/288/312/336XAYCU(A) Triple Outdoor Unit REYQ360/384/408/432/456XATJU(A) REYQ360/384/408/432/456XAYDU(A) REYQ360/384/408/432XAYCU(A) Part 1 General Information...

  • Page 22: Air Treatment Equipment

    External Appearance SiUS371901EB Air Treatment Equipment Outdoor-air processing unit Energy recovery ventilator FXMQ-MF (VAM series) VAM-G Branch Selector Unit Single Branch Selector Unit BSQ-T Multi Branch Selector Unit (Standard Series) BS-Q54T Multi Branch Selector Unit (Flex Series) BSF-Q54T Part 1 General Information...

  • Page 23: Combination Of Outdoor Units

    SiUS371901EB Combination of Outdoor Units 3. Combination of Outdoor Units REYQ-XATJU(A), REYQ-XAYDU(A), REYQ-XAYCU(A) Module System capacity Outdoor unit multi connection Number of units (Ton) piping kit 1 — BHFP26P100U BHFP26P100UA BHFP26P151U BHFP26P151UA 38 2 Notes: 1 For multiple connection, the outdoor unit multi connection piping kit (separately sold) is required. 2 Except REYQ-XAYCU(A).

  • Page 24: Capacity Range

    Capacity Range SiUS371901EB 4. Capacity Range Combination Ratio Total capacity index of the indoor units Connection ratio = Capacity index of the outdoor units REYQ96/120/144/168XATJU(A), REYQ96/120/144/168XAYDU(A), REYQ96/120/144/168XAYCU(A) Max. connection ratio Types of connected Type of connected air indoor units treatment equipments Min.

  • Page 25: Outdoor Unit Combinations

    SiUS371901EB Capacity Range Outdoor Unit Combinations REYQ-XATJU(A), REYQ-XAYDU(A), REYQ-XAYCU(A) Capacity range (Ton) 72XATJU(A) 96XATJU(A) 120XATJU(A) 144XATJU(A) 168XATJU(A) 192XATJU(A) 216XATJU(A) REYQ 72XAYDU(A) 96XAYDU(A) 120XAYDU(A) 144XAYDU(A) 168XAYDU(A) 192XAYDU(A) 216XAYDU(A) 72XAYCU(A) 96XAYCU(A) 120XAYCU(A) 144XAYCU(A) 168XAYCU(A) 192XAYCU(A) 216XAYCU(A) Max. number of connectable indoor units Total capacity index of indoor 51-93...

  • Page 26: Limitation Of Capacity Index For Heat Recovery

    Capacity Range SiUS371901EB Limitation of Capacity Index for Heat Recovery Single Branch Selector Unit Model BSQ36TVJ BSQ60TVJ BSQ96TVJ 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) Model...

  • Page 27: Specifications

    SiUS371901EB Specifications 5. Specifications REYQ-XATJU(A) Model name REYQ72XATJU REYQ72XATJA 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 77,000 (22.6) Casing color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 28 Specifications SiUS371901EB Model name REYQ96XATJU REYQ96XATJA 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) Casing color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 29 SiUS371901EB Specifications Model name REYQ120XATJU REYQ120XATJA Power supply 3 phase, 208/230 V, 60 Hz 1 Cooling capacity Nominal 120,000 (35.2) Btu/h (kW) Rated 114,000 (33.4) 2 Heating capacity Nominal 135,000 (39.6) Btu/h (kW) Rated 129,000 (37.8) Casing color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 30 Specifications SiUS371901EB Model name REYQ144XATJU REYQ144XATJA 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) Casing color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 31 SiUS371901EB Specifications Model name REYQ168XATJU REYQ168XATJA Power supply 3 phase, 208/230 V, 60 Hz 1 Cooling capacity Nominal 168,000 (49.2) Btu/h (kW) Rated 160,000 (46.9) 2 Heating capacity Nominal 188,000 (55.1) Btu/h (kW) Rated 180,000 (52.7) Casing color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 32 Specifications SiUS371901EB Model name (Combination unit) REYQ192XATJU REYQ192XATJA REYQ96XATJU REYQ96XATJA Model name (Independent unit) REYQ96XATJU REYQ96XATJA 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 (kW) Rated...
  • Page 33 SiUS371901EB Specifications Model name (Combination unit) REYQ216XATJU REYQ216XATJA REYQ96XATJU REYQ96XATJA Model name (Independent unit) REYQ120XATJU REYQ120XATJA 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 (kW) Rated...
  • Page 34 Specifications SiUS371901EB Model name (Combination unit) REYQ240XATJU REYQ240XATJA REYQ120XATJU REYQ120XATJA Model name (Independent unit) REYQ120XATJU REYQ120XATJA Power supply 3 phase, 208/230 V, 60 Hz 1 Cooling capacity Nominal 240,000 (70.3) Btu/h (kW) Rated 228,000 (66.8) 2 Heating capacity Nominal 270,000 (79.1) Btu/h (kW) Rated...
  • Page 35 SiUS371901EB Specifications Model name (Combination unit) REYQ264XATJU REYQ264XATJA REYQ120XATJU REYQ120XATJA Model name (Independent unit) REYQ144XATJU REYQ144XATJA 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 (kW) Rated...
  • Page 36 Specifications SiUS371901EB Model name (Combination unit) REYQ288XATJU REYQ288XATJA REYQ144XATJU REYQ144XATJA Model name (Independent unit) REYQ144XATJU REYQ144XATJA Power supply 3 phase, 208/230 V, 60 Hz 1 Cooling capacity Nominal 288,000 (84.4) Btu/h (kW) Rated 274,000 (80.3) 2 Heating capacity Nominal 324,000 (95.0) Btu/h (kW) Rated...
  • Page 37 SiUS371901EB Specifications Model name (Combination unit) REYQ312XATJU REYQ312XATJA REYQ144XATJU REYQ144XATJA Model name (Independent unit) REYQ168XATJU REYQ168XATJA Power supply 3 phase, 208/230 V, 60 Hz 1 Cooling capacity Nominal 312,000 (91.4) Btu/h (kW) Rated 296,000 (86.7) 2 Heating capacity Nominal 351,000 (102.9) Btu/h (kW) Rated...
  • Page 38 Specifications SiUS371901EB Model name (Combination unit) REYQ336XATJU REYQ336XATJA REYQ168XATJU REYQ168XATJA Model name (Independent unit) REYQ168XATJU REYQ168XATJA 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) Btu/h (kW) Rated...
  • Page 39 SiUS371901EB Specifications Model name (Combination unit) REYQ360XATJU REYQ360XATJA REYQ120XATJU REYQ120XATJA Model name (Independent unit) REYQ120XATJU REYQ120XATJA REYQ120XATJU REYQ120XATJA Power supply 3 phase, 208/230 V, 60 Hz 1 Cooling capacity Nominal 360,000 (105.5) Btu/h (kW) Rated 342,000 (100.2) 2 Heating capacity Nominal 405,000 (118.7) Btu/h...
  • Page 40 Specifications SiUS371901EB Model name (Combination unit) REYQ384XATJU REYQ384XATJA REYQ120XATJU REYQ120XATJA Model name (Independent unit) REYQ120XATJU REYQ120XATJA REYQ144XATJU REYQ144XATJA Power supply 3 phase, 208/230 V, 60 Hz 1 Cooling capacity Nominal 384,000 (112.5) Btu/h (kW) Rated 364,000 (106.7) 2 Heating capacity Nominal 432,000 (126.6) Btu/h...
  • Page 41 SiUS371901EB Specifications Model name (Combination unit) REYQ408XATJU REYQ408XATJA REYQ120XATJU REYQ120XATJA Model name (Independent unit) REYQ144XATJU REYQ144XATJA REYQ144XATJU REYQ144XATJA Power supply 3 phase, 208/230 V, 60 Hz 1 Cooling capacity Nominal 408,000 (119.6) Btu/h (kW) Rated 388,000 (113.7) 2 Heating capacity Nominal 459,000 (134.5) Btu/h...
  • Page 42 Specifications SiUS371901EB Model name (Combination unit) REYQ432XATJU REYQ432XATJA REYQ144XATJU REYQ144XATJA Model name (Independent unit) REYQ144XATJU REYQ144XATJA REYQ144XATJU REYQ144XATJA Power supply 3 phase, 208/230 V, 60 Hz 1 Cooling capacity Nominal 432,000 (126.6) Btu/h (kW) Rated 410,000 (120.2) 2 Heating capacity Nominal 486,000 (142.4) Btu/h...
  • Page 43 SiUS371901EB Specifications Model name (Combination unit) REYQ456XATJU REYQ456XATJA REYQ144XATJU REYQ144XATJA Model name (Independent unit) REYQ144XATJU REYQ144XATJA REYQ168XATJU REYQ168XATJA Power supply 3 phase, 208/230 V, 60 Hz 1 Cooling capacity Nominal 450,000 (131.9) Btu/h (kW) Rated 430,000 (126.0) 2 Heating capacity Nominal 513,000 (150.3) Btu/h...

  • Page 44: Reyq-Xaydu(A)

    Specifications SiUS371901EB REYQ-XAYDU(A) Model name REYQ72XAYDU REYQ72XAYDA 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 77,000 (22.6) Casing color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 45 SiUS371901EB Specifications Model name REYQ96XAYDU REYQ96XAYDA 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) Casing color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 46 Specifications SiUS371901EB Model name REYQ120XAYDU REYQ120XAYDA Power supply 3 phase, 460 V, 60 Hz 1 Cooling capacity Nominal 120,000 (35.2) Btu/h (kW) Rated 114,000 (33.4) 2 Heating capacity Nominal 135,000 (39.6) Btu/h (kW) Rated 129,000 (37.8) Casing color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 47 SiUS371901EB Specifications Model name REYQ144XAYDU REYQ144XAYDA 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) Casing color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 48 Specifications SiUS371901EB Model name REYQ168XAYDU REYQ168XAYDA Power supply 3 phase, 460 V, 60 Hz 1 Cooling capacity Nominal 168,000 (49.2) Btu/h (kW) Rated 160,000 (46.9) 2 Heating capacity Nominal 188,000 (55.1) Btu/h (kW) Rated 180,000 (52.7) Casing color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 49 SiUS371901EB Specifications Model name (Combination unit) REYQ192XAYDU REYQ192XAYDA REYQ96XAYDU REYQ96XAYDA Model name (Independent unit) REYQ96XAYDU REYQ96XAYDA 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 (kW) Rated...
  • Page 50 Specifications SiUS371901EB Model name (Combination unit) REYQ216XAYDU REYQ216XAYDA REYQ96XAYDU REYQ96XAYDA Model name (Independent unit) REYQ120XAYDU REYQ120XAYDA 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 (kW) Rated...
  • Page 51 SiUS371901EB Specifications Model name (Combination unit) REYQ240XAYDU REYQ240XAYDA REYQ120XAYDU REYQ120XAYDA Model name (Independent unit) REYQ120XAYDU REYQ120XAYDA Power supply 3 phase, 460 V, 60 Hz 1 Cooling capacity Nominal 240,000 (70.3) Btu/h (kW) Rated 228,000 (66.8) 2 Heating capacity Nominal 270,000 (79.1) Btu/h (kW) Rated...
  • Page 52 Specifications SiUS371901EB Model name (Combination unit) REYQ264XAYDU REYQ264XAYDA REYQ120XAYDU REYQ120XAYDA Model name (Independent unit) REYQ144XAYDU REYQ144XAYDA 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 (kW) Rated...
  • Page 53 SiUS371901EB Specifications Model name (Combination unit) REYQ288XAYDU REYQ288XAYDA REYQ144XAYDU REYQ144XAYDA Model name (Independent unit) REYQ144XAYDU REYQ144XAYDA Power supply 3 phase, 460 V, 60 Hz 1 Cooling capacity Nominal 288,000 (84.4) Btu/h (kW) Rated 274,000 (80.3) 2 Heating capacity Nominal 324,000 (95.0) Btu/h (kW) Rated...
  • Page 54 Specifications SiUS371901EB Model name (Combination unit) REYQ312XAYDU REYQ312XAYDA REYQ144XAYDU REYQ144XAYDA Model name (Independent unit) REYQ168XAYDU REYQ168XAYDA Power supply 3 phase, 460 V, 60 Hz 1 Cooling capacity Nominal 312,000 (91.4) Btu/h (kW) Rated 296,000 (86.7) 2 Heating capacity Nominal 351,000 (102.9) Btu/h (kW) Rated...
  • Page 55 SiUS371901EB Specifications Model name (Combination unit) REYQ336XAYDU REYQ336XAYDA REYQ168XAYDU REYQ168XAYDA Model name (Independent unit) REYQ168XAYDU REYQ168XAYDA 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) Btu/h (kW) Rated...
  • Page 56 Specifications SiUS371901EB Model name (Combination unit) REYQ360XAYDU REYQ360XAYDA REYQ120XAYDU REYQ120XAYDA Model name (Independent unit) REYQ120XAYDU REYQ120XAYDA REYQ120XAYDU REYQ120XAYDA Power supply 3 phase, 460 V, 60 Hz 1 Cooling capacity Nominal 360,000 (105.5) Btu/h (kW) Rated 342,000 (100.2) 2 Heating capacity Nominal 405,000 (118.7) Btu/h...
  • Page 57 SiUS371901EB Specifications Model name (Combination unit) REYQ384XAYDU REYQ384XAYDA REYQ120XAYDU REYQ120XAYDA Model name (Independent unit) REYQ120XAYDU REYQ120XAYDA REYQ144XAYDU REYQ144XAYDA Power supply 3 phase, 460 V, 60 Hz 1 Cooling capacity Nominal 384,000 (112.5) Btu/h (kW) Rated 364,000 (106.7) 2 Heating capacity Nominal 432,000 (126.6) Btu/h...
  • Page 58 Specifications SiUS371901EB Model name (Combination unit) REYQ408XAYDU REYQ408XAYDA REYQ120XAYDU REYQ120XAYDA Model name (Independent unit) REYQ144XAYDU REYQ144XAYDA REYQ144XAYDU REYQ144XAYDA Power supply 3 phase, 460 V, 60 Hz 1 Cooling capacity Nominal 408,000 (119.6) Btu/h (kW) Rated 388,000 (113.7) 2 Heating capacity Nominal 459,000 (134.5) Btu/h...
  • Page 59 SiUS371901EB Specifications Model name (Combination unit) REYQ432XAYDU REYQ432XAYDA REYQ144XAYDU REYQ144XAYDA Model name (Independent unit) REYQ144XAYDU REYQ144XAYDA REYQ144XAYDU REYQ144XAYDA Power supply 3 phase, 460 V, 60 Hz 1 Cooling capacity Nominal 432,000 (126.6) Btu/h (kW) Rated 410,000 (120.2) 2 Heating capacity Nominal 486,000 (142.4) Btu/h...
  • Page 60 Specifications SiUS371901EB Model name (Combination unit) REYQ456XAYDU REYQ456XAYDA REYQ144XAYDU REYQ144XAYDA Model name (Independent unit) REYQ144XAYDU REYQ144XAYDA REYQ168XAYDU REYQ168XAYDA Power supply 3 phase, 460 V, 60 Hz 1 Cooling capacity Nominal 450,000 (131.9) Btu/h (kW) Rated 430,000 (126.0) 2 Heating capacity Nominal 513,000 (150.3) Btu/h...

  • Page 61: Reyq-Xaycu(A)

    SiUS371901EB Specifications REYQ-XAYCU(A) Model name REYQ72XAYCU REYQ72XAYCA 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 77,000 (22.6) Casing color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 62 Specifications SiUS371901EB Model name REYQ96XAYCU REYQ96XAYCA 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) Casing color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 63 SiUS371901EB Specifications Model name REYQ120XAYCU REYQ120XAYCA Power supply 3 phase, 575 V, 60 Hz 1 Cooling capacity Nominal 120,000 (35.2) Btu/h (kW) Rated 114,000 (33.4) 2 Heating capacity Nominal 135,000 (39.6) Btu/h (kW) Rated 129,000 (37.8) Casing color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 64 Specifications SiUS371901EB Model name REYQ144XAYCU REYQ144XAYCA 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) Casing color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 65 SiUS371901EB Specifications Model name REYQ168XAYCU REYQ168XAYCA Power supply 3 phase, 575 V, 60 Hz 1 Cooling capacity Nominal 168,000 (49.2) Btu/h (kW) Rated 160,000 (46.9) 2 Heating capacity Nominal 188,000 (55.1) Btu/h (kW) Rated 180,000 (52.7) Casing color Ivory white (5Y7.5/1) Dimensions: (H ×...
  • Page 66 Specifications SiUS371901EB Model name (Combination unit) REYQ192XAYCU REYQ192XAYCA REYQ96XAYCU REYQ96XAYCA Model name (Independent unit) REYQ96XAYCU REYQ96XAYCA 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...
  • Page 67 SiUS371901EB Specifications Model name (Combination unit) REYQ216XAYCU REYQ216XAYCA REYQ96XAYCU REYQ96XAYCA Model name (Independent unit) REYQ120XAYCU REYQ120XAYCA 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...
  • Page 68 Specifications SiUS371901EB Model name (Combination unit) REYQ240XAYCU REYQ240XAYCA REYQ120XAYCU REYQ120XAYCA Model name (Independent unit) REYQ120XAYCU REYQ120XAYCA Power supply 3 phase, 575 V, 60 Hz 1 Cooling capacity Nominal 240,000 (70.3) Btu/h (kW) Rated 228,000 (66.8) 2 Heating capacity Nominal 270,000 (79.1) Btu/h (kW) Rated...
  • Page 69 SiUS371901EB Specifications Model name (Combination unit) REYQ264XAYCU REYQ264XAYCA REYQ120XAYCU REYQ120XAYCA Model name (Independent unit) REYQ144XAYCU REYQ144XAYCA 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...
  • Page 70 Specifications SiUS371901EB Model name (Combination unit) REYQ288XAYCU REYQ288XAYCA REYQ144XAYCU REYQ144XAYCA Model name (Independent unit) REYQ144XAYCU REYQ144XAYCA Power supply 3 phase, 575 V, 60 Hz 1 Cooling capacity Nominal 288,000 (84.4) Btu/h (kW) Rated 274,000 (80.3) 2 Heating capacity Nominal 324,000 (95.0) Btu/h (kW) Rated...
  • Page 71 SiUS371901EB Specifications Model name (Combination unit) REYQ312XAYCU REYQ312XAYCA REYQ144XAYCU REYQ144XAYCA Model name (Independent unit) REYQ168XAYCU REYQ168XAYCA Power supply 3 phase, 575 V, 60 Hz 1 Cooling capacity Nominal 312,000 (91.4) Btu/h (kW) Rated 296,000 (86.7) 2 Heating capacity Nominal 351,000 (102.9) Btu/h (kW) Rated...
  • Page 72 Specifications SiUS371901EB Model name (Combination unit) REYQ336XAYCU REYQ336XAYCA REYQ168XAYCU REYQ168XAYCA Model name (Independent unit) REYQ168XAYCU REYQ168XAYCA 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 SiUS371901EB Specifications Model name (Combination unit) REYQ360XAYCU REYQ360XAYCA REYQ120XAYCU REYQ120XAYCA Model name (Independent unit) REYQ120XAYCU REYQ120XAYCA REYQ120XAYCU REYQ120XAYCA Power supply 3 phase, 575 V, 60 Hz 1 Cooling capacity Nominal 360,000 (105.5) Btu/h (kW) Rated 342,000 (100.2) 2 Heating capacity Nominal 405,000 (118.7) Btu/h...
  • Page 74 Specifications SiUS371901EB Model name (Combination unit) REYQ384XAYCU REYQ384XAYCA REYQ120XAYCU REYQ120XAYCA Model name (Independent unit) REYQ120XAYCU REYQ120XAYCA REYQ144XAYCU REYQ144XAYCA Power supply 3 phase, 575 V, 60 Hz 1 Cooling capacity Nominal 384,000 (112.5) Btu/h (kW) Rated 364,000 (106.7) 2 Heating capacity Nominal 432,000 (126.6) Btu/h...
  • Page 75 SiUS371901EB Specifications Model name (Combination unit) REYQ408XAYCU REYQ408XAYCA REYQ120XAYCU REYQ120XAYCA Model name (Independent unit) REYQ144XAYCU REYQ144XAYCA REYQ144XAYCU REYQ144XAYCA Power supply 3 phase, 575 V, 60 Hz 1 Cooling capacity Nominal 408,000 (119.6) Btu/h (kW) Rated 388,000 (113.7) 2 Heating capacity Nominal 459,000 (134.5) Btu/h...
  • Page 76 Specifications SiUS371901EB Model name (Combination unit) REYQ432XAYCU REYQ432XAYCA REYQ144XAYCU REYQ144XAYCA Model name (Independent unit) REYQ144XAYCU REYQ144XAYCA REYQ144XAYCU REYQ144XAYCA Power supply 3 phase, 575 V, 60 Hz 1 Cooling capacity Nominal 426,000 (124.8) Btu/h (kW) Rated 410,000 (120.2) 2 Heating capacity Nominal 486,000 (142.4) Btu/h...

  • Page 77: Part 2 Refrigerant Circuit

    SiUS371901EB Part 2 Refrigerant Circuit 1. Refrigerant Circuit (Piping Diagrams) ............71 1.1 Outdoor Unit ....................71 1.2 Indoor Unit....................75 1.3 Outdoor-Air Processing Unit............... 77 1.4 Branch Selector Unit .................. 78 2. Functional Parts Layout ................87 2.1 REYQ72/96/120XATJU(A), REYQ72/96/120XAYDU(A), REYQ72/96/120XAYCU(A) ................ 87 2.2 REYQ144/168XATJU(A), REYQ144/168XAYDU(A), REYQ144/168XAYCU(A) ................

  • Page 78: Refrigerant Circuit (Piping Diagrams)

    Refrigerant Circuit (Piping Diagrams) SiUS371901EB 1. Refrigerant Circuit (Piping Diagrams) Outdoor Unit No. in Electric piping Name Function symbol diagram Compressor Compressor is operated on frequencies between 15 rps to 140 rps by using the inverter. Refer to page 141. Inverter fan The fan rotation speed is varied in 53 steps by using inverter.
  • Page 79 SiUS371901EB Refrigerant Circuit (Piping Diagrams) No. in Electric piping Name Function symbol diagram Thermistor Used to detect suction pipe temperature of compressor. (33) R12T (Compressor suction) Thermistor Used to detect gas pipe temperature of receiver gas purge piping. (34) R13T (Receiver gas purge) Thermistor (M1C body) Detects compressor surface temperature, this switch is activated at...
  • Page 80 Refrigerant Circuit (Piping Diagrams) SiUS371901EB REYQ72/96/120XATJU(A), REYQ72/96/120XAYDU(A), REYQ72/96/120XAYCU(A) Part 2 Refrigerant Circuit...
  • Page 81 SiUS371901EB Refrigerant Circuit (Piping Diagrams) REYQ144/168XATJU(A), REYQ144/168XAYDU(A), REYQ144/168XAYCU(A) Part 2 Refrigerant Circuit...

  • Page 82: Indoor Unit

    Refrigerant Circuit (Piping Diagrams) SiUS371901EB Indoor Unit Symbol No. in Except piping Name Function FXMQ-PB, FXTQ-TA, FXMQ-PB diagram FXTQ-TA, CXTQ-TA CXTQ-TA 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 83 SiUS371901EB Refrigerant Circuit (Piping Diagrams)  FXMQ-PB  FXTQ-TA Gas piping connection port Indoor heat exchanger Liquid piping connection port Filter Filter C: 4D034245R C: 4D068194  CXTQ-TA Gas piping connection port Indoor heat exchanger Liquid piping connection port Filter Filter Part 2 Refrigerant Circuit...

  • Page 84: Outdoor-Air Processing Unit

    Refrigerant Circuit (Piping Diagrams) SiUS371901EB Outdoor-Air Processing Unit 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 Used to control the flow rate of refrigerant, and make the SH...

  • Page 85: Branch Selector Unit

    SiUS371901EB 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 86 Refrigerant Circuit (Piping Diagrams) SiUS371901EB 1.4.2 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 87 SiUS371901EB Refrigerant Circuit (Piping Diagrams) 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 88 Refrigerant Circuit (Piping Diagrams) SiUS371901EB 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 89 SiUS371901EB Refrigerant Circuit (Piping Diagrams) 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 90 Refrigerant Circuit (Piping Diagrams) SiUS371901EB 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 91 SiUS371901EB Refrigerant Circuit (Piping Diagrams) 1.4.3 Multi Branch Selector Unit (Flex Series) BSF4Q54TVJ 3D122813 Part 2 Refrigerant Circuit...
  • Page 92 Refrigerant Circuit (Piping Diagrams) SiUS371901EB BSF6Q54TVJ 3D125655 Part 2 Refrigerant Circuit...
  • Page 93 SiUS371901EB Refrigerant Circuit (Piping Diagrams) BSF8Q54TVJ 3D125656 Part 2 Refrigerant Circuit...

  • Page 94: Functional Parts Layout

    Functional Parts Layout SiUS371901EB 2. Functional Parts Layout REYQ72/96/120XATJU(A), REYQ72/96/120XAYDU(A), REYQ72/96/120XAYCU(A) Plane View Electronic expansion valve High pressure sensor (Refrigerant cooling) (S1NPH) (Y5E) Solenoid valve (Liquid shutoff) Electronic expansion valve (Y3S) (Subcooling heat exchanger) Solenoid valve (Y2E) (Hot gas bypass) Four way valve (Y2S) (Heat exchanger upper)
  • Page 95 SiUS371901EB Functional Parts Layout Part B Thermistor (Receiver gas purge) (R13T) Electronic expansion valve (Receiver gas purge) (Y7E) Part A detail Thermistor (Subcooling injection) (R16T) Thermistor (Receiver inlet) (R3T) Thermistor (Heat exchanger liquid upper) (R4T) Thermistor (Heat exchanger liquid lower) (R5T) Thermistor (Subcooling liquid) (R7T)

  • Page 96: Reyq144/168Xatju(A), Reyq144/168Xaydu(A), Reyq144/168Xaycu(A)

    Functional Parts Layout SiUS371901EB REYQ144/168XATJU(A), REYQ144/168XAYDU(A), REYQ144/168XAYCU(A) Plane View High pressure sensor Electronic expansion valve (S1NPH) (Refrigerant cooling) Solenoid valve (Liquid shutoff) (Y5E) (Y3S) Electronic expansion valve (Subcooling heat exchanger) Solenoid valve (Y2E) (Hot gas bypass) Four way valve (Y2S) (Heat exchanger upper) Solenoid valve (Oil separator oil return) (Y6S)
  • Page 97 SiUS371901EB Functional Parts Layout Electronic expansion valve (Receiver gas purge) (Y7E) Part B Thermistor (Receiver gas purge) (R13T) Part A detail Thermistor (Subcooling injection) (R16T) Thermistor (Receiver inlet) (R3T) Thermistor (Heat exchanger liquid upper) (R4T) Thermistor (Heat exchanger liquid lower) (R5T) Thermistor (Subcooling liquid) (R7T)

  • Page 98: Refrigerant Flow For Each Operation Mode

    Refrigerant Flow for Each Operation Mode SiUS371901EB 3. Refrigerant Flow for Each Operation Mode Cooling Operation High temperature, high pressure gas High temperature, high pressure liquid Low temperature, low pressure gas Low temperature, low pressure liquid S1NPH S1NPL S1PH C: 3D119212 C: 3D119213 Part 2 Refrigerant Circuit...

  • Page 99: Heating Operation

    SiUS371901EB Refrigerant Flow for Each Operation Mode Heating Operation High temperature, high pressure gas High temperature, high pressure liquid Low temperature, low pressure gas Low temperature, low pressure liquid S1NPH S1NPL S1PH C: 3D119212 C: 3D119213 Part 2 Refrigerant Circuit...

  • Page 100: Simultaneous Cooling And Heating Operation

    Refrigerant Flow for Each Operation Mode SiUS371901EB Simultaneous Cooling and Heating Operation High temperature, high pressure gas High temperature, high pressure liquid Low temperature, low pressure gas Low temperature, low pressure liquid S1NPH S1NPL S1PH C: 3D119212 C: 3D119213 Part 2 Refrigerant Circuit...

  • Page 101: Cooling Oil Return Operation

    SiUS371901EB Refrigerant Flow for Each Operation Mode Cooling Oil Return Operation High temperature, high pressure gas High temperature, high pressure liquid Low temperature, low pressure gas Low temperature, low pressure liquid S1NPH S1NPL S1PH C: 3D119212 C: 3D119213 Part 2 Refrigerant Circuit...

  • Page 102: Defrost Heating Oil Return Operation

    Refrigerant Flow for Each Operation Mode SiUS371901EB Defrost Heating Oil Return Operation High temperature, high pressure gas High temperature, high pressure liquid Low temperature, low pressure gas Low temperature, low pressure liquid S1NPH S1NPL S1PH C: 3D119212 C: 3D119213 Part 2 Refrigerant Circuit...

  • Page 103: Oil Return Operation At Simultaneous Cooling And Heating Operation

    SiUS371901EB Refrigerant Flow for Each Operation Mode Oil Return Operation at Simultaneous Cooling and Heating Operation High temperature, high pressure gas High temperature, high pressure liquid Low temperature, low pressure gas Low temperature, low pressure liquid S1NPH S1NPL S1PH C: 3D119212 C: 3D119213 Part 2 Refrigerant Circuit...

  • Page 104: Part 3 Remote Controller

    SiUS371901EB Part 3 Remote Controller 1. Applicable Models ..................98 2. Names and Functions ................99 2.1 BRC1E73 ....................99 2.2 BRC1H71W....................102 2.3 Wireless Remote Controller ..............110 3. Main/Sub Setting..................111 3.1 BRC1E73 ....................111 3.2 BRC1H71W....................113 3.3 When Wireless Remote Controller is Used Together....... 115 4.

  • Page 105: Applicable Models

    SiUS371901EB Applicable Models 1. Applicable Models Wired remote controller Series Wireless remote controller Navigation Madoka FXFQ-T — BRC082A42W (for BYFQ60C3W1W) FXZQ-TA BRC082A42S (for BYFQ60C3W1S) BRC082A41W (for BYFQ60B3W1) FXUQ-P — FXEQ-P FXDQ-M BRC4C82 FXSQ-TA BRC082A43 BRC4C82 (Fan: 2 steps) FXMQ-PB BRC082A43 (Fan: 3 steps) BRC1E73 BRC1H71W FXMQ-M...

  • Page 106: Names And Functions

    Names and Functions SiUS371901EB 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 107 SiUS371901EB Names and Functions 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 108 Names and Functions SiUS371901EB 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 109: Brc1H71W

    SiUS371901EB Names and Functions 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 110 Names and Functions SiUS371901EB 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 111 SiUS371901EB Names and Functions 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 112 Names and Functions SiUS371901EB 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 113 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 114 Names and Functions SiUS371901EB 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 115 SiUS371901EB Names and Functions 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 116 * 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 117: Wireless Remote Controller

    SiUS371901EB Names and Functions 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 118: Main/Sub Setting

    Main/Sub Setting SiUS371901EB 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 119 SiUS371901EB Main/Sub Setting 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 120: Brc1H71W

    Main/Sub Setting SiUS371901EB 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 121 SiUS371901EB Main/Sub Setting 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 122: When Wireless Remote Controller Is Used Together

    Main/Sub Setting SiUS371901EB 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 123: Address Setting For Wireless Remote Controller

    SiUS371901EB Address Setting for Wireless Remote Controller 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 124 Address Setting for Wireless Remote Controller SiUS371901EB 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 125: Centralized Control Group No. Setting

    SiUS371901EB Centralized Control Group No. Setting 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 126 Centralized Control Group No. Setting SiUS371901EB 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 127: Brc1H71W

    SiUS371901EB Centralized Control Group No. Setting 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 128: Group No. Setting Example

    Centralized Control Group No. Setting SiUS371901EB Group No. Setting Example Central Remote Controller Indoor/Outdoor Outdoor/Outdoor Indoor/Outdoor Outdoor/Outdoor F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 Group Control by Remote Controller Main 1-00...

  • Page 129: Service Settings Menu, Maintenance Menu

    SiUS371901EB Service Settings Menu, Maintenance Menu 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 130 Service Settings Menu, Maintenance Menu SiUS371901EB 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 131 SiUS371901EB Service Settings Menu, Maintenance Menu 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, Outdoor unit depending on the particular model.) Operation Hours...
  • Page 132 Service Settings Menu, Maintenance Menu SiUS371901EB Maintenance Menu Item 2 Remarks Forced Defrost Forced defrost ON Enables the forced defrost operation. Forced defrost OFF Disables the forced defrost operation. Error Display Display error ON Displays the error on the screen. Display error OFF Displays neither errors nor warnings.

  • Page 133: Administrator Menu, Installer Menu

    SiUS371901EB Administrator Menu, Installer Menu 7. Administrator Menu, Installer Menu BRC1H71W Refer to page 104 for details. Part 3 Remote Controller...

  • Page 134: Part 4 Functions And Control

    SiUS371901EB Part 4 Functions and Control 1. Operation Flowchart................129 1.1 Outdoor Unit ..................... 129 1.2 Branch Selector Unit & Indoor Unit Operation Mode Detail ..... 130 2. Stop Control ....................131 2.1 Stop due to Error ..................131 2.2 When System is in Stop Mode ..............131 2.3 Slave Unit Stops during Master Unit Operation........
  • Page 135 SiUS371901EB 9.2 Set Temperature and Control Target Temperature........163 9.3 Remote Controller Thermistor ..............165 9.4 Thermostat Control................... 167 9.5 Drain Pump Control.................. 170 9.6 Control of Electronic Expansion Valve ............. 172 9.7 Freeze-Up Prevention Control..............173 9.8 List of Swing Flap Operations ..............175 9.9 Hot Start Control (In Heating Operation Only)..........

  • Page 136: Operation Flowchart

    Operation Flowchart SiUS371901EB 1. Operation Flowchart Outdoor Unit For detailed description of each function in the flow below, refer to the details on related function on the following pages. Stop control (1) Stop due to error (2) When system is in stop control (3) Slave unit stops during master unit control Special control Standby control...

  • Page 137: Branch Selector Unit & Indoor Unit Operation Mode Detail

    SiUS371901EB Operation Flowchart Branch Selector Unit & Indoor Unit Operation Mode Detail ∗1. The switch for the Branch Selector unit is operated when pressure equalization control turns ON after cooling/heating mode of other indoor unit is changed or on the timing of oil returns. ∗2.

  • Page 138: Stop Control

    Stop Control SiUS371901EB 2. Stop Control Stop due to Error In order to protect compressors, if any of the abnormal state occurs, the system will stop with thermostat OFF and the error will be determined when the retry times reaches certain number. (Refer to Error Codes and Descriptions on page 277 of the troubleshooting for the items to determine the error.) When System is in Stop Mode...

  • Page 139: Standby Control

    SiUS371901EB Standby Control 3. Standby Control Restart Standby Used to forcedly stop the compressor for a period of 2 minutes, in order to prevent the frequent ON/OFF of the compressor and equalize the pressure within the refrigerant system. In addition, the outdoor fan carry out the residual operation for a while to accelerate pressure equalizing and to suppress melting of the refrigerant to the evaporator.

  • Page 140: Startup Control

    Startup Control SiUS371901EB 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 141: Startup Control In Heating

    SiUS371901EB Startup Control Startup Control in Heating Frequency step up 5 sec. interval +10 rps/10 sec. Frequency REYQ72-120XA REYQ144/168XA (rps) 16.4 16.4 0 Hz Compressor (M1C) PI control Initial opening Electronic expansion 0 pulse valve (main) (Y1E) Step 8 Inverter fan Step 4 (M1F + M2F) Pc –...

  • Page 142: Basic Control

    Basic Control SiUS371901EB 5. Basic Control Normal Control Function Part name Electric symbol Normal cooling Normal heating Normal simultaneous cooling/heating Compressor PI control, High pressure PI control, High pressure PI control, High pressure protection, Low pressure protection, Low pressure protection, Low pressure protection, protection, protection,...

  • Page 143: Compressor Pi Control

    SiUS371901EB Basic Control Compressor PI Control Carries out the compressor capacity PI control to maintain Te at constant during cooling operation and Tc at constant during heating operation to ensure stable unit performance. On multi-outdoor-unit systems, this control is made according to values of the first-priority unit, which is detected with the pressure sensor.

  • Page 144: Compressor Step Control

    Basic Control SiUS371901EB Compressor Step Control The compressor operation varies in the following steps according to information in Compressor PI Control on page 136. Single unit installation REYQ72-120XA Step No. Step No. Step No. 15.0 36.7 84.5 15.2 37.2 85.7 15.4 37.7 86.9...
  • Page 145 SiUS371901EB Basic Control REYQ144/168XA Step No. Step No. Step No. Step No. 16.4 24.2 55.7 128.2 16.5 24.5 56.4 130.0 16.6 24.9 57.2 131.8 16.7 25.2 58.0 133.7 16.8 25.6 58.9 135.6 REYQ168XA upper limit 16.9 25.9 59.7 17.0 26.3 60.5 17.1 26.6...

  • Page 146: Electronic Expansion Valve Pi Control

    Basic Control SiUS371901EB Electronic Expansion Valve PI Control Main electronic expansion valve EVM control When the outdoor unit heat exchanging is performed via the condenser (Y5S or Y6S is set to OFF), this function is used to exert PI control on the electronic expansion valve (Y1E or Y3E) so that the condenser outlet subcooling degree (SC) will become constant.

  • Page 147: Step Control Of Outdoor Fans

    SiUS371901EB Basic Control Step Control of Outdoor Fans Used to control the revolutions of outdoor fans in the steps listed in table below, according to condition changes. Standard (default) Heating/ Step X Cooling Simultaneous Step No. Cooling Heating REYQ72XA REYQ96XA REYQ120XA REYQ144/168XA 1040...

  • Page 148: Heat Exchanger Control

    Basic Control SiUS371901EB Heat Exchanger Control While in heating or cool/heat simultaneous operation, ensure target condensing and evaporating temperature by changing over the air heat exchange of outdoor unit to the evaporator or the condenser in response to loads. Single system Outdoor unit Outdoor unit Lower side...

  • Page 149: Protection Control

    SiUS371901EB 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 150 Protection Control SiUS371901EB Heating Normal control < 3.17 MPa > 3.31 MPa (460 psi) Pc: High pressure sensor (480 psi) detection value for master > 3.39 MPa unit (492 psi) All units Compressor step: 1 9-step down After 10 After 10 seconds >...

  • Page 151: Low Pressure Protection Control

    SiUS371901EB Protection Control Low Pressure Protection Control This low pressure protection control is used to protect compressors against the transient decrease of low pressure. Cooling Normal control < 0.25 MPa > 0.39 MPa (36.3 psi) (56.6 psi) Pe: Low pressure sensor detection value for master unit All compressors step: 1...

  • Page 152: Discharge Pipe Protection Control

    Protection Control SiUS371901EB Discharge Pipe Protection Control HTdi : Value of compressor discharge pipe temperature (Tdi) compensated with outdoor air temperature : Compressor body temperature : Maximum of HTdi and Ti X (˚C)(Y (˚F)) : REYQ72-120XA →115˚C (239˚F) (constant) REYQ144/168XA →Temperature determined by compressor rotation speed X (˚C) Y (˚F)

  • Page 153: Compressor Body Protection Control

    SiUS371901EB Protection Control Compressor Body Protection Control This compressor body protection control is used to protect the compressor internal temperature against an error or transient increase of compressor body temperature. Contents The following control is performed for each compressor. Normal control Compressor body temperature >...
  • Page 154 Protection Control SiUS371901EB Radiation fin temperature control Perform the following control of integrated as well as multi units for each compressor. Normal operation Reduce compressor capacity When occurring 4 times within 60 Fin temperature standby minutes, the error code L4 is output. Condition REYQ72-120XATJU(A) REYQ72-120XAYDU(A)

  • Page 155: Special Control

    SiUS371901EB Special Control 7. Special Control Pump Down Residual Operation Pc : High pressure sensor detection value Pe : Low pressure sensor detection value Ta : Outdoor air temperature Te : Low pressure equivalent saturation temperature DSH : Discharge pipe superheating degree If the liquid refrigerant stays in the evaporator at the startup of a compressor, this liquid refrigerant enters the compressor, thus resulting in diluted oil in the compressor and then degraded lubrication performance.

  • Page 156: Oil Return Operation

    Special Control SiUS371901EB Oil Return Operation In order to prevent the compressor from running out of oil, the oil return operation is conducted to recover oil that has flowed out from the compressor to the system side. Tc : High pressure equivalent saturation temperature Te : Low pressure equivalent saturation temperature TsA: Suction pipe temperature detected by thermistor R3T 7.2.1 Oil Return Operation in Cooling Operation...
  • Page 157 SiUS371901EB Special Control Indoor unit actuator Oil return operation Thermostat ON unit Remote controller setting Non-operating unit Thermostat OFF unit Remote controller setting Electronic expansion valve Thermostat ON unit Normal control Non-operating unit 224 pulse Thermostat OFF unit Forced thermostat ON (PI control) Branch Selector unit actuator Normal cooling Electronic expansion valve...
  • Page 158 Special Control SiUS371901EB 7.2.2 Oil Return Operation in Heating Operation Starting conditions Part name Electric symbol Oil return operation Compressor +1 to +6 steps from frequency to frequency when oil return is IN at a constant level Inverter fan M1F, M2F Same as normal control Electronic expansion valve Same as normal control...

  • Page 159: Defrost Operation

    SiUS371901EB Special Control Defrost Operation To defrost the outdoor heat exchanger while in Evaporator, the defrost operation is conducted to recover the heating capacity. Tb: Heat exchanger deicer temperature Part name Electric symbol Defrost operation Compressor REYQ72-120XA: 134 rps REYQ144/168XA: 119 rps Inverter fan With high pressure M1F, M2F...

  • Page 160: Outdoor Unit Rotation

    Special Control SiUS371901EB Outdoor Unit Rotation In the case of multi outdoor unit system, this outdoor unit rotation prevents the compressor from breaking down due to unbalanced oil level between outdoor units. Details of outdoor unit rotation In the case of multi outdoor unit system, each outdoor unit is given an operating priority for the control.

  • Page 161: Cooling/Heating Mode Switching

    SiUS371901EB Special Control Cooling/Heating Mode Switching While in cooling/heating mixed mode, single-room cooling → heating First, the electronic expansion valve of the indoor unit in cooling operation will close, and the Y2E and Y3E electronic expansion valves of the branch selector unit will all close once. Next, the Y2E electronic expansion valve will open little by little to perform pressure equalization.
  • Page 162 Special Control SiUS371901EB While in cooling/heating mixed mode, single-room heating → cooling First, the electronic expansion valve of the indoor unit in heating operation will close, and the Y2E and Y3E electronic expansion valves of the branch selector unit will all close once. Next, the Y3E electronic expansion valve will open little by little to perform pressure equalization.
  • Page 163 SiUS371901EB Special Control While in all-room cooling operation → All-room cooling/heating simultaneous operation (1) All the indoor units in cooling operation Dual pressure gas pipe  Using the dual pressure gas pipe as a suction gas Suction gas pipe pipe. Liquid (2) Pump-down residual operation pipe...

  • Page 164: Other Control

    Other Control SiUS371901EB 8. Other Control Backup Operation If any of the compressors goes wrong, disable the relevant compressor or the relevant outdoor unit from operating, and then conduct emergency operation only with operational compressors or outdoor units. "Emergency operation with remote controller reset" and "Emergency operation with outdoor unit PCB setting"...
  • Page 165 SiUS371901EB Other Control  Outdoor fan operates at “step 1”.  Heating operation is enabled when outdoor air temperature drops below 24°C (75.2°F). Part 4 Functions and Control...

  • Page 166: Outline Of Control (Indoor Unit)

    Outline of Control (Indoor Unit) SiUS371901EB 9. Outline of Control (Indoor Unit) Operation Flowchart Cooling Operation Start (Option) Turn ON Aux. electric : OFF power supply ∗4 heater Humidifier : OFF Initialize electronic expansion valve Swing flap Detect louver lock prevention condition? The previous settings of airflow LED in remote...
  • Page 167 SiUS371901EB Outline of Control (Indoor Unit) ∗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 168 Outline of Control (Indoor Unit) SiUS371901EB Heating Operation Drain : OFF pump kit Swing flap? Set wind direction Swing flap Is test run in progress? defrost conditions for gas operation in furnace operation progress? Depends on the intensity established? of gas combustion. (Option) Aux.
  • Page 169 SiUS371901EB Outline of Control (Indoor Unit) prevention operation will be conducted. If the evaporator inlet temperature is kept at not less than 7°C (44.6°F) for a consecutive period of 10 min., the freeze-up prevention operation will be reset. ∗6. Thermostat status 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.

  • Page 170: Set Temperature And Control Target Temperature

    Outline of Control (Indoor Unit) SiUS371901EB Set Temperature and Control Target Temperature 9.2.1 Without Optional Infrared Presence/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 171 SiUS371901EB Outline of Control (Indoor Unit) 9.2.2 With Optional Infrared Presence/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 172: Remote Controller Thermistor

    Outline of Control (Indoor Unit) SiUS371901EB 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 173 SiUS371901EB Outline of Control (Indoor Unit)  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 174: Thermostat Control

    Outline of Control (Indoor Unit) SiUS371901EB Thermostat Control 9.4.1 Without Optional Infrared Presence/Floor Sensor Whether the thermostat is turned ON or OFF is determined by the difference between the remote controller set temperature and the actual detected room temperature (∗1). Normal operation ...
  • Page 175 SiUS371901EB Outline of Control (Indoor Unit) 9.4.2 With Optional Infrared Presence/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 176 Outline of Control (Indoor Unit) SiUS371901EB 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 177: Drain Pump Control

    SiUS371901EB Outline of Control (Indoor Unit) 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 178 Outline of Control (Indoor Unit) SiUS371901EB 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 179: Control Of Electronic Expansion Valve

    SiUS371901EB Outline of Control (Indoor Unit) 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 outdoor unit, the units will give a priority to the control command.

  • Page 180: Freeze-Up Prevention Control

    Outline of Control (Indoor Unit) SiUS371901EB 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 181 SiUS371901EB Outline of Control (Indoor Unit) Note(s) When the indoor unit is FXFQ-T, FXZQ-TA or FXUQ-P, 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 182: List Of Swing Flap Operations

    Outline of Control (Indoor Unit) SiUS371901EB List of Swing Flap Operations Swing flaps operate as shown in table below. Flap FXFQ-T FXEQ-P FXHQ-M FXAQ-P Hot start from defrost Swing Horizontal Horizontal Horizontal Horizontal operation Airflow direction set Horizontal Horizontal Horizontal Horizontal Defrost operation Swing...

  • Page 183: Hot Start Control (In Heating Operation Only)

    SiUS371901EB Outline of Control (Indoor Unit) 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 184: Louver Control For Preventing Ceiling Dirt

    Outline of Control (Indoor Unit) SiUS371901EB 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 185: Heater Control (Except Fxtq-Ta Models)

    SiUS371901EB Outline of Control (Indoor Unit) 9.11 Heater Control (Except FXTQ-TA 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 below. Set temperature 2˚C 2˚C...

  • Page 186: Heater Control (Fxtq-Ta Models)

    Outline of Control (Indoor Unit) SiUS371901EB 9.12 Heater Control (FXTQ-TA Models) Note(s) Optional heater kit HKS... is required. For FXTQ-TA 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.) Fan residual operation also interlocks with the fan residual operation of heater kit HKS….
  • Page 187 SiUS371901EB Outline of Control (Indoor Unit) 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 188 Outline of Control (Indoor Unit) SiUS371901EB 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 outdoor unit PCB. When the hot-water heating signal is received from the outdoor unit PCB, heating operation is performed only with the electric heater as manual backup operation.

  • Page 189: Gas Furnace Control (Cxtq-Ta Models)

    SiUS371901EB Outline of Control (Indoor Unit) 9.13 Gas Furnace Control (CXTQ-TA Models) Outline When conditions for gas furnace operation are established, the system transits into gas furnace operation, CXTQ-TA requires the gas furnace combustion heating. Detail • Thermostat: ON • Thermostat: OFF Thermostat OFF Thermostat ON •...

  • Page 190: 3-Step Thermostat Processing (Fxtq-Ta Models)

    Outline of Control (Indoor Unit) SiUS371901EB 9.14 3-Step Thermostat Processing (FXTQ-TA 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 Models) on page 179.

  • Page 191: Fan Control (Heater Residual) (Fxtq-Ta Models)

    SiUS371901EB Outline of Control (Indoor Unit) 9.15 Fan Control (Heater Residual) (FXTQ-TA 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 192 Outline of Control (Indoor Unit) SiUS371901EB 9.16.3 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 193: Part 5 Field Settings And Test Operation

    SiUS371901EB Part 5 Field Settings and Test Operation 1. Field Settings for Indoor Unit..............187 1.1 Field Settings with Remote Controller ............187 1.2 List of Field Settings for Indoor Unit ............194 1.3 Applicable Field Settings ................196 1.4 Details of Field Settings for Indoor Unit............ 200 1.5 Gas Furnace Set Up.................

  • Page 194: Field Settings For Indoor Unit

    Field Settings for Indoor Unit SiUS371901EB 1. Field Settings for Indoor Unit 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 195 SiUS371901EB Field Settings for Indoor Unit 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 196 Field Settings for Indoor Unit SiUS371901EB 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 197 SiUS371901EB Field Settings for Indoor Unit 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 198 Field Settings for Indoor Unit SiUS371901EB 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 199 SiUS371901EB Field Settings for Indoor Unit 1.1.3 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: ...
  • Page 200 Field Settings for Indoor Unit SiUS371901EB 1.1.4 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 201: List Of Field Settings For Indoor Unit

    SiUS371901EB Field Settings for Indoor Unit List of Field Settings for Indoor Unit : Factory setting Mode First Second Code No. Page Code Setting Contents Reference (Note 2) Filter Ultra long life Approx. Approx. cleaning filter 10,000 5,000 sign hrs. hrs.
  • Page 202 Field Settings for Indoor Unit SiUS371901EB Mode First Second Code No. Page Code Setting Contents Reference (Note 2) Setting of airflow rate Standard High ceiling 1 High ceiling 2 — Airflow direction setting 4-direction 2-direction 3-direction airflow — airflow airflow Swing pattern settings All direction Facing...

  • Page 203: Applicable Field Settings

    SiUS371901EB Field Settings for Indoor Unit Applicable Field Settings First Field Code Setting Modes FXFQ-T FXZQ-TA FXUQ-P FXEQ-P FXDQ-M FXSQ-TA FXMQ-PB setting Filter cleaning sign interval Filter sign setting — — — — — — — Filter type — — —...
  • Page 204 Field Settings for Indoor Unit SiUS371901EB First Field Code Setting Modes FXFQ-T FXZQ-TA FXUQ-P FXEQ-P FXDQ-M FXSQ-TA FXMQ-PB setting Optional kit setting (UV lamp + Humidifier + — — — — — — — Economizer) 14 (24) Residential dry — —...
  • Page 205 SiUS371901EB Field Settings for Indoor Unit First Field Code Setting Modes FXMQ-M FXHQ-M FXAQ-P FXLQ-M FXNQ-M FXTQ-TA CXTQ-TA setting Filter cleaning sign interval — — Filter sign setting — — — — — Filter type — — — — — —...
  • Page 206 Field Settings for Indoor Unit SiUS371901EB First Field Code Setting Modes FXMQ-M FXHQ-M FXAQ-P FXLQ-M FXNQ-M FXTQ-TA CXTQ-TA setting Drain pump operation — — — — — — — settings Humidification when heating thermostat is OFF Setting of direct duct —...

  • Page 207: Details Of Field Settings For Indoor Unit

    SiUS371901EB Field Settings for Indoor Unit Details of Field Settings for Indoor Unit 1.4.1 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 10 (20)-0...
  • Page 208 Field Settings for Indoor Unit SiUS371901EB (˚F) (˚C) 96.8 93.2 In cooling 89.6 Suction air Remote controller Suction air thermistor thermistor thermistor Suction air Suction air Remote controller 82.4 thermistor thermistor thermistor 78.8 75.2 71.6 (˚C) 62.6 66.2 69.8 73.4 80.6 84.2 87.8 91.4 98.6 (˚F)
  • Page 209 SiUS371901EB Field Settings for Indoor Unit : Factory setting Mode First Code Second Code Contents Remote controller thermistor control is not permitted 01 during group control 10 (20) Remote controller thermistor control is permitted during group control. Note(s) When the 10 (20)-6 setting is changed to 02, several indoor units are controlled by one remote controller thermistor, so note that the room temperature might be uneven.
  • Page 210 Field Settings for Indoor Unit SiUS371901EB Human 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 211 SiUS371901EB Field Settings for Indoor Unit 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 212 Field Settings for Indoor Unit SiUS371901EB 1.4.8 Electric Heater Setting (for FXTQ-TA models) : Factory setting Contents Second Code Mode No. First Code No. Electric heater run for Heater operation defrost/oil return operation Electric heater with heat 01 Not allowed pump not allowed...
  • Page 213 SiUS371901EB Field Settings for Indoor Unit 1.4.10 Setting the Rate of Human Detection (For units with an infrared presence/floor sensor only) Set the sensitivity of the infrared presence/floor sensor.  The infrared presence/floor sensor can be disabled by selecting the Second code No. 04. Note(s) When the infrared presence/floor sensor is disabled, the remote controller menu does not display some functions such as the automatic draft reduction, energy-saving operation in absence and halt...
  • Page 214 Field Settings for Indoor Unit SiUS371901EB 2. If the air passageway including duct or blow-off ports is changed after automatic adjustment, make sure to perform automatic airflow adjustment again. 1.4.12 Compensating the Temperature around People (For units with the infrared presence/floor sensor only) Change the ratio between the suction air temperature and floor temperature used to calculate the temperature around human.
  • Page 215 SiUS371901EB Field Settings for Indoor Unit 1.4.14 Optional Output Switching 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 Second Code...
  • Page 216 Field Settings for Indoor Unit SiUS371901EB 1.4.17 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 217 SiUS371901EB Field Settings for Indoor Unit 1.4.20 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 218 Field Settings for Indoor Unit SiUS371901EB FXHQ-M, FXAQ-P : Factory setting Mode First Code Second Ceiling height Code No. 01 Standard 13 (23) Slight increase Normal increase 1.4.22 Airflow Direction Setting Set the airflow direction of indoor units as given in the table below. (Set when sealing material kit of air discharge outlet has been installed.) The second code No.
  • Page 219 SiUS371901EB Field Settings for Indoor Unit 1.4.26 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). FXMQ-PB models : Factory setting Mode No. First Code No. Second Code No.
  • Page 220 Field Settings for Indoor Unit SiUS371901EB 1.4.27 Optional Kit Setting (UV lamp + Humidifier + Economizer) (for FXTQ-TA and CXTQ-TA models) : Factory setting Contents Second Code Economizer setting for Mode No. First Code No. UV lamp + humidifier fan Mech standby duration speed (minutes)
  • Page 221 SiUS371901EB Field Settings for Indoor Unit 1.4.31 Drain Pump Operation Settings (for FXMQ-PB models) The drain pump operation can be disabled for natural drainage by changing the following field setting. : Factory setting Mode First Code Second Code Contents — 15 (25) 02...
  • Page 222 Field Settings for Indoor Unit SiUS371901EB 1.4.36 Display of Error Codes on the Remote Controller For BRC1E73 only Error code (four digits) is displayed for limited products. Select two-digit display if four-digit display is not preferred. : Factory setting Mode First Code Second Code Contents...
  • Page 223 SiUS371901EB Field Settings for Indoor Unit 1.4.39 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 224: Gas Furnace Set Up

    Field Settings for Indoor Unit SiUS371901EB Gas Furnace Set Up Set-up for gas furnace is possible only by using the DIP switches located on CXTQ-TA. Gas furnace’s DIP switch is not valid. Refer to the gas furnace’s installation manual for details of each setting menu.
  • Page 225 SiUS371901EB Field Settings for Indoor Unit Dip switch — — B — — ON OFF Heating Speed Tap — — — — Part 5 Field Settings and Test Operation...

  • Page 226: List Of Field Settings For Outdoor-Air Processing Unit

    Field Settings for Indoor Unit SiUS371901EB List of Field Settings for Outdoor-Air Processing Unit : Factory setting First Second Code No. Mode Code Setting Contents Filter contamination 2500 hr 1250 hr — — — — — — — — — —...
  • Page 227 SiUS371901EB Field Settings for Indoor Unit Example ON by remote OFF by remote Temperature Operation mode controller controller Control OFF by control by setting by (Unified ON by (Unified OFF by remote mode is "1". remote controller remote controller central remote central remote controller controller)

  • Page 228: Field Setting From Outdoor Unit

    Field Setting from Outdoor Unit SiUS371901EB 2. Field Setting from Outdoor Unit To continue the configuration of the VRV heat recovery 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 229: Dip Switch Setting When Mounting A Spare Pcb

    SiUS371901EB Field Setting from Outdoor Unit DIP Switch Setting 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 230 Field Setting from Outdoor Unit SiUS371901EB The figure below shows the required position of the DIP switches on spare PCB for REYQ-XA. Change DIP switches at time of power disconnected. Application model The setting method ( represents the position of switches) REYQ72XA Set DS2-2 to ON.

  • Page 231: Accessing The Bs Buttons On The Pcb

    SiUS371901EB Field Setting from Outdoor 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 logic board and read out the seven-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 232: Operating The Bs Buttons And Dip Switches On The Pcb

    Field Setting from Outdoor Unit SiUS371901EB Operating the BS Buttons and DIP Switches on the PCB Operating the BS buttons By operating the BS buttons it is possible to:  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 233 SiUS371901EB Field Setting from Outdoor 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 234 Field Setting from Outdoor Unit SiUS371901EB Mode 2 Mode 2 is used to set field settings of the outdoor 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 235: Connecting The Pc Configurator To The Outdoor Unit

    SiUS371901EB Field Setting from Outdoor Unit Connecting the PC Configurator to the Outdoor Unit Connection of the optional PC configurator cable to the outdoor unit has to be done on A1P. Connect the 999482P3 cable to the 5-pin blue connector X27A. Caution Works executed on the outdoor unit are best done under dry weather conditions to avoid water ingress.

  • Page 236: Monitoring Function And Field Settings

    Field Setting from Outdoor Unit SiUS371901EB Monitoring Function and Field Settings The operation of the outdoor unit can further be defined by changing some field settings. Next to making field settings it is also possible to confirm the current operation parameters of the unit. The setting can also be performed via the PC configuration software.
  • Page 237 SiUS371901EB Field Setting from Outdoor Unit [1-5]: shows the current Te target parameter position. [1-6]: shows the current Tc target parameter position. [1-10]: shows the total number of connected indoor units. It can be convenient to check if the total number of indoor units which are installed match the total number of indoor units which are recognized by the system.
  • Page 238 Field Setting from Outdoor Unit SiUS371901EB 2.5.2 Overview of Setting Mode (Mode 2) This overview shows the available settings by using the press buttons on the outdoor unit PCB. Item Description Description 7 segment 7 segment ∗1 display display Range COOL/HEAT Several systems as 1 zone Individual...
  • Page 239 SiUS371901EB Field Setting from Outdoor Unit Item Description Description 7 segment 7 segment ∗1 display display Range Power transistor Used to troubleshoot DC check compressor. Inverter waveforms ON (10 Hz) are output without wire connections to the compressor. It is useful to determine whether the relevant trouble has resulted from the compressor or inverter PCB.
  • Page 240 Field Setting from Outdoor Unit SiUS371901EB Item Description Description 7 segment 7 segment ∗1 display display Range Outdoor > 40 m To increase Tc target heating. Level > 40 m (130 ft) (130 ft) below Level max. 40 m (130 ft) indoor Do not use Heat pump...
  • Page 241 SiUS371901EB Field Setting from Outdoor Unit Item Description Description 7 segment 7 segment ∗1 display display Range Heat pump Heat pump is locked out when the –26.1°C (–15°F) lockout outdoor air temperature is smaller –23.3°C (–10°F) temperature than the heat pump lockout –20.5°C (–5°F) temperature.
  • Page 242 Field Setting from Outdoor Unit SiUS371901EB ∗1: Numbers in the "No." column represent the number of times to press the BS button. ∗ : Setting does not return to factory setting when exit mode 2. To cancel the function, change setting manually to factory setting. ∗...
  • Page 243 SiUS371901EB Field Setting from Outdoor Unit 2.5.3 Details of Setting Mode 2 (m2) 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 244 Field Setting from Outdoor Unit SiUS371901EB [2-8]: Te target temperature during cooling operation Default value: 0 Value Tc target [2-8] 0 (default) Auto (6-17°C) (42.8-62.6°F) 6°C (42.8°F) 7°C (44.6°F) 8°C (46.4°F) 9°C (48.2°F) 10°C (50.0°F) 11°C (51.8°F) Change [2-8] to 0, 2-7 in function of required operation method during cooling. [2-9]: Tc target temperature (Tc fix control) Default value: 0...
  • Page 245 SiUS371901EB Field Setting from Outdoor Unit [2-20]: Additional refrigerant charge In order to add the additional refrigerant charge amount following setting should be applied. Default value: 0 To activate this function, change [2-20] to 1. To stop the additional refrigerant charge operation (when the required additional refrigerant amount is charged), press the RETURN (BS3) button.
  • Page 246 Field Setting from Outdoor Unit SiUS371901EB [2-26]: Night-time low noise operation start time Change [2-26] to 1, 2 or 3 in function of required timing. Default value: 2 Value Start time automatic night-time low noise [2-26] operation (approximately) About 8:00 PM 2 (default) About 10:00 PM About 12:00 AM...
  • Page 247 SiUS371901EB Field Setting from Outdoor Unit [2-28]: Power transistor check mode To evaluate the output of the power transistors. Use this function in case error code is displayed related to defective inverter PCB or compressor is locked. Default value: 0. Power transistor check mode is not active. Field setting 1: Power transistor check mode is active.
  • Page 248 Field Setting from Outdoor Unit SiUS371901EB Next time graph shows the different steps during the power transistor check mode.  Switching sequence during power transistor check mode: Power transistor check mode REYQ-XA disconnect fasten U/V/W from compressor! Check 4 Voltage Step 1: Step 2: Magnet...
  • Page 249 SiUS371901EB Field Setting from Outdoor Unit [2-29]: Capacity priority When the night-time low noise operation is in use, performance of system might drop because airflow rate of outdoor unit is reduced. Default value: 0. Capacity priority cannot be used. Field setting 1: Capacity priority can temporary cancel the night-time low noise operation.
  • Page 250 Field Setting from Outdoor Unit SiUS371901EB [2-31]: Power consumption limitation level (step 2) via the external control adaptor (DTA104A61/62) If the system needs to run under power consumption limitation conditions when an external signal is sent to the unit, this setting defines the level power consumption limitation that will be applied for step 2.
  • Page 251 SiUS371901EB Field Setting from Outdoor Unit Note(s) ∗1. Indoor condition A: Temperature difference Average of (indoor air temperature – set temperature) is less than 1.5°C (2.7°F). ∗2. Indoor condition B: Temperature difference Average of (indoor air temperature – set temperature) is 3°C (5.4°F) or more. [2-35]: Height difference setting Default value: 1...
  • Page 252 Field Setting from Outdoor Unit SiUS371901EB [2-47]: Te target temperature during heat recovery operation Default value: 0. Value Te target [2-47] 0 (default) Auto (6-17°C) (42.8-62.6°F) 6°C (42.8°F) 7°C (44.6°F) 8°C (46.4°F) 9°C (48.2°F) 10°C (50.0°F) 11°C (51.8°F) Change [2-47] to 0, 2-7 in function of required operation method during heat recovery operation [2-49]: Height difference setting...
  • Page 253 SiUS371901EB Field Setting from Outdoor Unit [2-71]: Branch selector switching time Default value: 0. Used for changing branch selector switching time. ∗All piping length between branch selector unit and indoor units should be less than 9.7 m (32 ft). [2-81]: Cooling comfort setting Default value: 1 Value...
  • Page 254 Field Setting from Outdoor Unit SiUS371901EB [2-90]: Indoor unit without power U4 error generation. In case an indoor unit needs maintenance or repair on the electric side, it is possible to keep the rest of the VRV DX indoor units operating without power supply to some indoor unit(s).
  • Page 255 SiUS371901EB Field Setting from Outdoor Unit 2.5.4 Auxiliary Heat Control To improve efficiency the auxiliary heat can be lockout based on outdoor temperature. Item Description Increments Auxiliary heater Below this temperature, auxiliary 65°F allowable heater can be energized based 0°F (35°F 5°F temperature...
  • Page 256 Field Setting from Outdoor Unit SiUS371901EB 2.5.5 Heat Pump Lockout New control logic to provide more application options for cold climates. Outside temperature can now be measured directly from the outdoor unit coil sensor. This field setting can switch automatically to emergency heat if there is a system fault. Item Description Increments...
  • Page 257 SiUS371901EB Field Setting from Outdoor Unit [2-78]: Heat pump lockout temperature Heat pump would be locked out when the outdoor air temperature is smaller than the Heat Pump Lockout Temperature below – this setting is only affective when heat pump lockout mode has been set. Unit will switch to heat pump lockout. Heat pump lockout Fahrenheit (°F) Celsius (°C)
  • Page 258 Field Setting from Outdoor Unit SiUS371901EB [2-79]: Heat pump lockout release differential Heat pump would be resumed when the outdoor air temperature is recovered by differential (below) above the heat pump lockout temperature. Heat pump lockout Fahrenheit (°F) Celsius (°C) release differential 1 (default) When heat pump lockout mode has been set the auto backup function will automatically be set.

  • Page 259: Cool/Heat Mode Changeover

    SiUS371901EB Field Setting from Outdoor Unit Cool/Heat Mode Changeover Set Cool/Heat Separately for Each Branch Selector Unit by Cool/Heat Selector. Set remote controller changeover switch DS1-1 as following:  Set the DIP switch (DS1-1) on printed circuit board (A1P) as shown below before turning on the power to the Branch Selector unit.

  • Page 260: Night-Time Low Noise Operation And Demand Operation

    Field Setting from Outdoor Unit SiUS371901EB Night-Time Low Noise Operation and Demand Operation 2.7.1 Night-Time Low Noise Operation By connecting the external contact input to the low noise input of the outdoor unit external control adaptor (optional), you can lower operating noise. Setting Content Level 1...
  • Page 261 SiUS371901EB Field Setting from Outdoor Unit Image of operation in the case of A Operation If capacity priority is set in sound Capacity priority setting, the fan speed will be increased according to the load of air conditioning when load is heavier. Operation sound Rated during low noise...
  • Page 262 Field Setting from Outdoor Unit SiUS371901EB 2.7.2 Demand Operation By connecting the external contact input to the demand input of the outdoor unit external control adaptor for outdoor unit (optional), the power consumption of unit operation can be saved suppressing the compressor operating condition. Description of setting Setting procedure External control...
  • Page 263 SiUS371901EB Field Setting from Outdoor Unit When the Normal demand operation is carried out. (Use of the external control adaptor for outdoor unit is not required.) While in setting mode 2, set the item 2-32 (Setting of alternate demand) to ON. While in setting mode 2, select a demand 1 level for the item 2-30.
  • Page 264 Field Setting from Outdoor Unit SiUS371901EB The power Power consumption consumption can be set with the Demand 1 level setting. (70% of rated power Rated consumption has been set at factory.) The power consumption set with Demand level Demand level Demand 1 level setting.

  • Page 265: Field Settings For Branch Selector Unit

    SiUS371901EB Field Settings for Branch Selector Unit 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 266: Field Settings For Multi Branch Selector Unit (Standard Series)

    Field Settings for Branch Selector Unit SiUS371901EB 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 267: Field Settings For Multi Branch Selector Unit (Flex Series)

    SiUS371901EB Field Settings for Branch Selector Unit 2. Setting when joining branch ports Setting when joining branch ports Setting (Example 2) ON (Joined) DIP switch setting OFF (Factory default) (Example 2) (A1P) (A2P) (A3P) DIP switch No. When joining the A and B branches BS4Q54TVJ BS6Q54TVJ...
  • Page 268 Field Settings for Branch Selector Unit SiUS371901EB 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 269: How To Check Miswiring For Multi Branch Selector Unit

    SiUS371901EB Field Settings for Branch Selector Unit 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 270: Test Operation

    Test Operation SiUS371901EB 4. Test Operation Checks before Test Operation Before carrying out a test operation, proceed as follows: Step Action Make sure the voltage at the primary side of the safety breaker is: 187 - 253 V (-XATJU(A)) 416 - 508 V (-XAYDU(A)) 518 - 632 V (-XAYCU(A)) Fully open the liquid and the gas stop valve.

  • Page 271: Gas Furnace Test Operation

    SiUS371901EB Test Operation Gas Furnace Test Operation Caution Always use the remote controller to stop the test operation. The test should be performed with the following procedure. 1. All install process, including heat pump system, has been done. 2. Test operation of heat pump system has been successfully completed. 3.

  • Page 272: Part 6 Service Diagnosis

    SiUS371901EB Part 6 Service Diagnosis 1. Symptom-based Troubleshooting ............268 1.1 Indoor Unit Overall ................... 268 1.2 With Gas Furnace ..................271 1.3 Gas Furnace Lockout Reset..............271 1.4 With Optional Infrared Presence/Floor Sensor......... 272 2. Troubleshooting with Remote Controller..........273 2.1 BRC1E73 ....................273 2.2 BRC1H71W....................
  • Page 273 SiUS371901EB 3.29 Remote Controller Thermistor Abnormality ..........328 3.30 Outdoor Unit Main PCB Abnormality............329 3.31 Detection of Ground Leakage by Leak Detection Circuit ......330 3.32 Missing of Ground Leakage Detection Core ..........331 3.33 Activation of High Pressure Switch ............332 3.34 Activation of Low Pressure Sensor ............
  • Page 274 SiUS371901EB 3.74 Transmission Error between Centralized Controller and Indoor Unit ..408 3.75 System Not Set Yet .................. 411 3.76 System Abnormality, Refrigerant System Address Undefined ....412 3.77 Climate Talk Communication System Combination Error (Before Initial Setting for Communication Completes)............ 414 3.78 Climate Talk Communication System Combination Error (After Initial Setting for Communication Completes)............

  • Page 275: Symptom-Based Troubleshooting

    SiUS371901EB 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 276 Symptom-based Troubleshooting SiUS371901EB Symptom Supposed Cause Countermeasure The system The remote controller displays The system stops due to an Remove causes of electrical noises. makes error codes U4 or U5, and the interruption in communication If these causes are removed, the intermittent system stops but restarts after between units caused by electrical...
  • Page 277 SiUS371901EB Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure The system Indoor unit These are operating sounds of the Normal operation. produces Immediately after turning ON electronic expansion valve of the This sound becomes low after a sounds. the power supply, indoor unit indoor unit.

  • Page 278: With Gas Furnace

    Symptom-based Troubleshooting SiUS371901EB With Gas Furnace Symptom Supposed Cause The gas furnace does not start operation. The gas furnace does not start operation while the compressor is during operation or under stop-control, or right after defrost IN or defrost OUT. Wait until the operation becomes stable. Operation does not switch from heat pump to gas furnace in This function is performed only with outdoor units which spite of low room temperature.

  • Page 279: With Optional Infrared Presence/Floor Sensor

    SiUS371901EB Symptom-based Troubleshooting With Optional Infrared Presence/Floor Sensor Condition Measure "Louver operation different from setting" or "No downward Refer to the following table. airflow in heating operation" Individual airflow direction setting different from the actual · Check the "Louver operation different from setting" error airflow direction diagnosis.

  • Page 280: Troubleshooting With Remote Controller

    Troubleshooting with Remote Controller SiUS371901EB 2. Troubleshooting with 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 281: Brc1H71W

    SiUS371901EB Troubleshooting with Remote Controller 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 282 Troubleshooting with Remote Controller SiUS371901EB  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 283 SiUS371901EB Troubleshooting with Remote Controller 7. Press MODE button to return to the normal mode. If you do not press any button for 1 minute, the remote controller automatically returns to the normal mode. 2. Change the unit number with Normal mode UP button or DOWN button.

  • Page 284: Troubleshooting By Error Code

    Troubleshooting by Error Code SiUS371901EB 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 285 SiUS371901EB Troubleshooting by Error Code Error Operation Reference Error contents code lamp page Harness abnormality (between outdoor unit main PCB and inverter PCB) Outdoor fan motor signal abnormality Outdoor fan PCB abnormality Outdoor air thermistor (R1T) abnormality Discharge pipe thermistor (R21T) abnormality Compressor body thermistor (R14T) abnormality Compressor suction thermistor (R12T) abnormality Suction pipe thermistor (R10T) abnormality...
  • Page 286 Troubleshooting by Error Code SiUS371901EB ∗2: The system may or may not continue operation depending on the conditions. Part 6 Service Diagnosis...

  • Page 287: Error Codes (Sub Codes)

    SiUS371901EB Troubleshooting by Error Code Error Codes (Sub Codes) If an error code like the one shown below is displayed when the navigation remote controller (BRC1E series) is in use, make a detailed diagnosis or a diagnosis of the relevant unit. 3.2.1 Indoor Unit Troubleshooting Error code...
  • Page 288 Troubleshooting by Error Code SiUS371901EB Troubleshooting Error code Error Description Diagnosis Indoor blower does not have required parameters to Refer to page 320. C6 - 02 function U4 - 01 Indoor-outdoor transmission error Refer to the U4 flowchart. Refrigerant type error The type of refrigerant used for the indoor unit is different UA - 13 from that used for the outdoor unit.
  • Page 289 SiUS371901EB Troubleshooting by Error Code Troubleshooting Error code Error Description Diagnosis E7 - 01 Fan motor M1F lock (Master) Make a diagnosis of the fan motor of the relevant unit based on the following. E7 - 02 Fan motor M2F lock (Master) Fan motor lock: 01, 02, 13, 14, 25, 26 E7 - 05 Fan motor M1F momentary overcurrent (Master)
  • Page 290 Troubleshooting by Error Code SiUS371901EB Troubleshooting Error code Error Description Diagnosis F4 - 01 Wet alarm Refer to the F4 flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left. F4 - 02 Wet alarm for compressor M1C (Master) F4 - 04 Wet alarm for compressor M1C (Slave 1)
  • Page 291 SiUS371901EB Troubleshooting by Error Code Troubleshooting Error code Error Description Diagnosis J5 - 01 Defective compressor suction thermistor (R12T) (Master) Refer to the J5 flowchart and make a diagnosis of the relevant thermistor of the relevant unit based on the J5 - 03 Defective compressor suction thermistor (R12T) (Slave 1) Error code shown to the left.
  • Page 292 Troubleshooting by Error Code SiUS371901EB Troubleshooting Error code Error Description Diagnosis Defective heat exchanger liquid upper thermistor (R4T) Refer to the J8 flowchart and make a diagnosis of the J8 - 01 (Master) relevant thermistor of the relevant unit based on the Error code shown to the left.
  • Page 293 SiUS371901EB Troubleshooting by Error Code 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 294 Troubleshooting by Error Code SiUS371901EB Troubleshooting Error code Error Description Diagnosis L8 - 03 Compressor M1C overcurrent (Master) Refer to the L8 flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left. L8 - 06 Compressor M1C overcurrent (Slave 1) L8 - 07...
  • Page 295 SiUS371901EB Troubleshooting by Error Code Troubleshooting Error code Error Description Diagnosis PJ - 04 Incorrect type of inverter PCB (Master) Refer to the PJ flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left. PJ - 05 Incorrect type of inverter PCB (Slave 1) PJ - 06...
  • Page 296 Troubleshooting by Error Code SiUS371901EB Troubleshooting Error code Error Description Diagnosis Error when external control adaptor for outdoor unit is Refer to the U7 flowchart and make a diagnosis of the U7 - 01 installed relevant unit based on the Error code shown to the left. Warning when external control adaptor for outdoor unit is U7 - 02 installed...

  • Page 297: External Protection Device Abnormality

    SiUS371901EB Troubleshooting by Error Code External Protection Device Abnormality 3.3.1 External Protection Device Abnormality Applicable All indoor unit models 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 Conditions "external ON/OFF terminal".
  • Page 298 Troubleshooting by Error Code SiUS371901EB 3.3.2 External Protection Device Abnormality (FXTQ-TA and CXTQ-TA Only) Applicable FXTQ-TA, CXTQ-TA 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 299: Indoor Unit Control Pcb Abnormality

    SiUS371901EB Troubleshooting by Error Code 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 300: Drain Level Control System Abnormality

    Troubleshooting by Error Code SiUS371901EB Drain Level Control System Abnormality Applicable FXFQ-T, FXZQ-TA, FXUQ-P, FXEQ-P, FXDQ-M, FXSQ-TA, FXMQ-PB Models 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. Conditions Supposed ...
  • Page 301 SiUS371901EB Troubleshooting by Error Code 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 302: Indoor Fan Motor Lock, Overload

    Troubleshooting by Error Code SiUS371901EB Indoor Fan Motor Lock, Overload Applicable FXFQ-T, FXZQ-TA, FXUQ-P, FXEQ-P, FXSQ05-48TA, FXMQ07-12PB, FXAQ-P Models 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 Conditions Supposed...
  • Page 303 SiUS371901EB 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 supply, and then wait for a period of 10 minutes. Are there any foreign matter Remove the foreign matter.

  • Page 304: Indoor Fan Motor Abnormality

    Troubleshooting by Error Code SiUS371901EB Indoor Fan Motor Abnormality 3.7.1 Indoor Fan Motor Abnormality (FXDQ-M, FXHQ-M) 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...
  • Page 305 SiUS371901EB Troubleshooting by Error Code 3.7.2 Indoor Fan Motor Abnormality (FXSQ54TA, FXMQ15-54PB) Applicable FXSQ54TA, FXMQ15-54PB 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 306 Troubleshooting by Error Code SiUS371901EB 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 307 SiUS371901EB Troubleshooting by Error Code 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 308: Overload/Overcurrent/Lock Of Indoor Fan Motor

    Troubleshooting by Error Code SiUS371901EB 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 309: Blower Motor Not Running

    SiUS371901EB Troubleshooting by Error Code Blower Motor Not Running Applicable FXTQ-TA 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 5 times successively, it is deemed abnormal operation.

  • Page 310: Indoor Fan Motor Status Abnormality

    Troubleshooting by Error Code SiUS371901EB 3.10 Indoor Fan Motor Status Abnormality Applicable FXTQ-TA 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 311: Low Indoor Airflow

    SiUS371901EB Troubleshooting by Error Code 3.11 Low Indoor Airflow Applicable FXTQ-TA 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 312: Swing Flap Motor Abnormality

    Troubleshooting by Error Code SiUS371901EB 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 313 SiUS371901EB Troubleshooting by Error Code 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 314: Power Supply Voltage Abnormality

    Troubleshooting by Error Code SiUS371901EB 3.13 Power Supply Voltage Abnormality Applicable FXSQ-TA, FXMQ-PB 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 315: Blower Motor Stops For Over/Under Voltage

    SiUS371901EB Troubleshooting by Error Code 3.14 Blower Motor Stops for Over/Under Voltage Applicable FXTQ-TA 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 316: Electronic Expansion Valve Coil Abnormality, Dust Clogging

    Troubleshooting by Error Code SiUS371901EB 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 317: Gas Furnace Abnormality

    SiUS371901EB Troubleshooting by Error Code 3.16 Gas Furnace Abnormality Applicable CXTQ-TA Models AA-03 Error Code Method of Error Detects the error signal from the gas furnace when any error occurs on the gas furnace. The indoor Detection unit displays AA-03 for any sort of gas furnace abnormality. Error Decision The error status differs depending on each error code of the gas furnace.

  • Page 318: Drain Level Above Limit

    Troubleshooting by Error Code SiUS371901EB 3.17 Drain Level above Limit Applicable FXFQ-T, FXZQ-TA, FXUQ-P, FXEQ-P, FXDQ-M, FXSQ-TA, FXMQ-PB Models 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 319: Capacity Determination Device Abnormality

    SiUS371901EB Troubleshooting by Error Code 3.18 Capacity Determination Device Abnormality 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 320: Transmission Abnormality Between Indoor Unit Control Pcb And Fan Pcb

    Troubleshooting by Error Code SiUS371901EB 3.19 Transmission Abnormality between Indoor Unit Control PCB and Fan PCB Applicable FXSQ-TA, FXMQ-PB 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 321 SiUS371901EB Troubleshooting by Error Code 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 322: Blower Motor Communication Error

    Troubleshooting by Error Code SiUS371901EB 3.20 Blower Motor Communication Error Applicable FXTQ-TA 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 323: Climate Talk Communication Error

    SiUS371901EB Troubleshooting by Error Code 3.21 Climate Talk Communication Error Applicable CXTQ-TA Models C1-08 Error Code Method of Error Monitors the communication with the gas furnace connected to the Climate Talk Communication Detection terminal. Error Reset The error decision is made when the communication with the gas furnace is lost after once the Conditions initial setting for communication with the gas furnace completes.

  • Page 324: Thermistor Abnormality

    Troubleshooting by Error Code SiUS371901EB 3.22 Thermistor Abnormality Applicable C4, C5: All indoor units Models C9: except FXTQ-TA and CXTQ-TA 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 325: Combination Error Between Indoor Unit Control Pcb And Fan Pcb

    SiUS371901EB Troubleshooting by Error Code 3.23 Combination Error between Indoor Unit Control PCB and Fan PCB Applicable FXSQ-TA, FXMQ-PB 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 326: Blower Motor Hp Mismatch

    Troubleshooting by Error Code SiUS371901EB 3.24 Blower Motor HP Mismatch Applicable FXTQ-TA 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 327: Indoor Blower Does Not Have Required Parameters To Function

    SiUS371901EB Troubleshooting by Error Code 3.25 Indoor Blower Does Not Have Required Parameters to Function Applicable FXTQ-TA 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 328: Remote Sensor Abnormality

    Troubleshooting by Error Code SiUS371901EB 3.26 Remote Sensor Abnormality Applicable FXTQ-TA, CXTQ-TA 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 329: Humidity Sensor System Abnormality

    SiUS371901EB Troubleshooting by Error Code 3.27 Humidity Sensor System Abnormality Applicable FXFQ-T 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 330: Infrared Presence/Floor Sensor Error

    Troubleshooting by Error Code SiUS371901EB 3.28 Infrared Presence/Floor Sensor Error Applicable FXFQ-T, FXUQ-P 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. Error Decision Error is detected based on sensor output signals Conditions Supposed...
  • Page 331 SiUS371901EB Troubleshooting by Error Code 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 (A4P) and the connector (∗1) normal? Is the connection of the Connect the connector correctly.
  • Page 332 Troubleshooting by Error Code SiUS371901EB Diagnosis procedure 2 Infrared floor sensor error (Error code CE-02) Is the connection of the connector on infrared floor sensor Connect the connector correctly. PCB (A3P) and the connector (∗1) normal? Is the connection of the Connect the connector correctly.
  • Page 333 SiUS371901EB Troubleshooting by Error Code Diagnosis procedure 3 Infrared floor sensor error (Error code CE-03) Is the connection of the connector on infrared floor sensor Connect the connector correctly. PCB (A3P) and the connector (∗1) normal? Is the connection of the Connect the connector correctly.
  • Page 334 Troubleshooting by Error Code SiUS371901EB Diagnosis procedure 4 Infrared floor sensor error (Error code CE-04) Is the connection of the connector on infrared floor sensor Connect the connector correctly. PCB (A3P) and the connector (∗1) normal? Is the connection of the Connect the connector correctly.

  • Page 335: Remote Controller Thermistor Abnormality

    SiUS371901EB Troubleshooting by Error Code 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. ∗...

  • Page 336: Outdoor Unit Main Pcb Abnormality

    Troubleshooting by Error Code SiUS371901EB 3.30 Outdoor Unit Main PCB Abnormality Applicable All outdoor 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 outdoor unit. Error Decision When the communication conditions in the hardware section between the indoor unit and the Conditions...

  • Page 337: Detection Of Ground Leakage By Leak Detection Circuit

    SiUS371901EB Troubleshooting by Error Code 3.31 Detection of Ground Leakage by Leak Detection Circuit Applicable All outdoor 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 outdoor unit Detection main PCB.

  • Page 338: Missing Of Ground Leakage Detection Core

    Troubleshooting by Error Code SiUS371901EB 3.32 Missing of Ground Leakage Detection Core Applicable All outdoor 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 (Q1LD).

  • Page 339: Activation Of High Pressure Switch

    SiUS371901EB Troubleshooting by Error Code 3.33 Activation of High Pressure Switch Applicable All outdoor 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 340 Troubleshooting by Error Code SiUS371901EB 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 characteristics of the ( 1) Use the table on CHECK 12 to high pressure convert the voltage measurement into sensor...

  • Page 341: Activation Of Low Pressure Sensor

    SiUS371901EB Troubleshooting by Error Code 3.34 Activation of Low Pressure Sensor Applicable All outdoor unit models Models Error Code Method of Error Make judgment of pressure detected by the low pressure sensor with the outdoor unit main PCB. Detection Error Decision When low pressure caused a drop while the compressor is in operation: Conditions ...
  • Page 342 Troubleshooting by Error Code SiUS371901EB Reference CHECK 2 Refer to page 417. Reference CHECK 12 Refer to page 432. Part 6 Service Diagnosis...

  • Page 343: Compressor Motor Lock

    SiUS371901EB Troubleshooting by Error Code 3.35 Compressor Motor Lock Applicable All outdoor unit models Models Error Code Method of Error Inverter 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 344 Troubleshooting by Error Code SiUS371901EB The insulation resistance of the relevant Replace the compressor. compressor is low (< 100 k:) Power OFF The internal wiring of the compressor coil is defective. Restart the compressor, and then check for the Quit work. operation.

  • Page 345: Compressor Damage Alarm

    SiUS371901EB Troubleshooting by Error Code 3.36 Compressor Damage Alarm Applicable All outdoor unit models Models Error Code Method of Error Determine the symptom to be error by detecting the revolutions of the compressor and pressure Detection values detected by the high and low pressure sensors, and further making a comparison between a theoretical current value of the compressor calculated from parameters detected and an actual current value detected by the power transistor.
  • Page 346 Troubleshooting by Error Code SiUS371901EB the high pressure and ow pressure checked by the service checker the Replace the outdoor unit main same as the actual measured PCB (A1P). values of the high and low pressure sensors? CHECK 4 Is the power transistor Replace the inverter PCB.

  • Page 347: Outdoor Fan Motor Abnormality

    SiUS371901EB Troubleshooting by Error Code 3.37 Outdoor Fan Motor Abnormality 3.37.1 Outdoor Fan Motor Abnormality (REYQ-XATJU(A), REYQ-XAYDU(A)) Applicable REYQ-XATJU(A), REYQ-XAYDU(A) Models Error Code Method of Error  Detects according to the value of current flowing through the inverter PCB (or fan PCB in case Detection of M2F).
  • Page 348 Troubleshooting by Error Code SiUS371901EB There is no continuity across the fuse (F101U) Replace the fan PCB (A4P, A5P). on the fan PCB. The fan cannot be rotated by hand Replace the relevant fan motor when disconnecting the connector from the (M1F, M2F).
  • Page 349 SiUS371901EB Troubleshooting by Error Code 3.37.2 Outdoor Fan Motor Abnormality (REYQ-XAYCU(A)) Applicable REYQ-XAYCU(A) Models Error Code Method of Error Detects according to the value of current flowing through the fan PCB. Detection Error Decision  Overcurrent is detected from the fan PCB (Detecting overcurrent 4 times will shut down the Conditions system).
  • Page 350 Troubleshooting by Error Code SiUS371901EB The fan cannot be rotated by hand when Replace the relevant fan motor disconnecting the connector from the (M1F, M2F). fan motor. Resistance between the fan motor power supply cable Replace the relevant fan motor terminal and the motor (M1F, M2F).

  • Page 351: Electronic Expansion Valve Coil Abnormality

    SiUS371901EB Troubleshooting by Error Code 3.38 Electronic Expansion Valve Coil Abnormality Applicable All outdoor unit models Models Error Code Method of Error Detects according to whether or not there is continuity across the electronic expansion valve coils. Detection Error Decision When no current flows through common (COM[+]) at the time of turning ON the power supply.

  • Page 352: Discharge Pipe Temperature Abnormality

    Troubleshooting by Error Code SiUS371901EB 3.39 Discharge Pipe Temperature Abnormality Applicable All outdoor 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 353 SiUS371901EB 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 354: Wet Alarm

    Troubleshooting by Error Code SiUS371901EB 3.40 Wet Alarm Applicable All outdoor unit models Models Error Code Method of Error In cooling operation, detect the condition under which liquid refrigerant returns to the compressor, Detection according to the temperature and pressure of each part. Error Decision When the following wet state continues for a period of 90 minutes, an alert is issued.
  • Page 355 SiUS371901EB 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. Mount a pressure gauge on the high pressure service port. Reset the operation, and then restart the operation. Are the characteristics of the suction pipe...

  • Page 356: Refrigerant Overcharged

    Troubleshooting by Error Code SiUS371901EB 3.41 Refrigerant Overcharged Applicable All outdoor unit models Models Error Code Method of Error Detect overcharged refrigerant according to outdoor air temperature, heat exchanger deicer Detection temperature, and liquid pipe temperature during check operation. Error Decision When the amount of refrigerant, which is calculated using outdoor air temperature, heat exchanger Conditions deicer temperature, and liquid pipe temperature during check operation, exceeds the regular...

  • Page 357: Branch Selector Unit Electronic Expansion Valve Abnormality

    SiUS371901EB Troubleshooting by Error Code 3.42 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 358 Troubleshooting by Error Code SiUS371901EB 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 359: Harness Abnormality (Between Outdoor Unit Main Pcb And Inverter Pcb)

    SiUS371901EB Troubleshooting by Error Code 3.43 Harness Abnormality (between Outdoor Unit Main PCB and Inverter PCB) Applicable All outdoor 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 360: Outdoor Fan Motor Signal Abnormality

    Troubleshooting by Error Code SiUS371901EB 3.44 Outdoor Fan Motor Signal Abnormality Applicable REYQ-XATJU(A), REYQ-XAYDU(A) Models Error Code Method of Error Detect of abnormal signal from fan motor. Detection Error Decision An abnormal signal is detected at startup of the fan motor operation. Conditions Supposed ...

  • Page 361: Outdoor Fan Pcb Abnormality

    SiUS371901EB Troubleshooting by Error Code 3.45 Outdoor Fan PCB Abnormality Applicable REYQ-XAYCU(A) Models Error Code Method of Error Detect with current sensor value. Detection Error Decision When the current sensor shows abnormality. Conditions Supposed Defective fan PCB (A5P, A6P) Causes Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution...

  • Page 362: Thermistor Abnormality

    Troubleshooting by Error Code SiUS371901EB 3.46 Thermistor Abnormality Applicable All outdoor unit models Models H9, J3, J5, J6, J7, J8, J9 Error Code Method of Error Detect according to temperature detected with individual thermistors. Detection Error Decision The system is in operation and the thermistor causes wiring disconnection or short circuit in it. Conditions Supposed ...
  • Page 363 SiUS371901EB Troubleshooting by Error Code Note(s) ∗1. Error codes and thermistors Error Applicable Thermistor Electric symbol Connector Code Outdoor air thermistor X18A Discharge pipe (M1C) thermistor R21T X19A (Group connector) Compressor body thermistor R14T Compressor suction thermistor X15A R12T (Group connector) Suction pipe thermistor X29A R10T...

  • Page 364: High Pressure Sensor Abnormality

    Troubleshooting by Error Code SiUS371901EB 3.47 High Pressure Sensor Abnormality Applicable All outdoor 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 365: Low Pressure Sensor Abnormality

    SiUS371901EB Troubleshooting by Error Code 3.48 Low Pressure Sensor Abnormality Applicable All outdoor 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 366: Inverter Pcb Abnormality

    Troubleshooting by Error Code SiUS371901EB 3.49 Inverter PCB Abnormality Applicable All outdoor 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 367 SiUS371901EB 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 supply once, and then turn it ON again. The error could have resulted from Return to normal? external factors other than failures (e.g.

  • Page 368: Momentary Power Failure During Test Operation

    Troubleshooting by Error Code SiUS371901EB 3.50 Momentary Power Failure during Test Operation Applicable All outdoor unit models Models Error Code Method of Error Momentary power failure is detected by the PCB. Detection Error Decision Judgment is made by AC power frequency detection circuit on the outdoor unit main PCB. Conditions Supposed ...

  • Page 369: Reactor Temperature Rise Abnormality

    SiUS371901EB Troubleshooting by Error Code 3.51 Reactor Temperature Rise Abnormality Applicable REYQ72-120XATJU(A) 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 370: Inverter Radiation Fin Temperature Rise Abnormality

    Troubleshooting by Error Code SiUS371901EB 3.52 Inverter Radiation Fin Temperature Rise Abnormality 3.52.1 Inverter Radiation Fin Temperature Rise Abnormality (Inverter PCB) Applicable All outdoor unit models Models Error Code Sub code: 01-03 Method of Error Detect temperature of power module of the inverter PCB. Detection Error Decision Thermistor located inside the power module of the inverter PCB for compressor and fan motor.
  • Page 371 SiUS371901EB 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 the cooling conditions of cooling tube used to cool the inverter. (1) Is the cooling tube plate fixed with screws? (2) Error code U0 is displayed on the Error History...
  • Page 372 Troubleshooting by Error Code SiUS371901EB 3.52.2 Inverter Radiation Fin Temperature Rise Abnormality (Fan PCB) Applicable REYQ-XAYCU(A) Models Error Code Sub code: 06, 07, 18-21 Method of Error Fan PCB radiation fin temperature is detected by the thermistor located inside the fan PCB circuit. Detection Error Decision Detected temperature exceeds a certain level.

  • Page 373: Compressor Instantaneous Overcurrent

    SiUS371901EB Troubleshooting by Error Code 3.53 Compressor Instantaneous Overcurrent Applicable All outdoor 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 374 Troubleshooting by Error Code SiUS371901EB Power OFF CHECK 4 Is the power Replace the inverter PCB. transistor normal? (*1) 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 375: Compressor Overcurrent

    SiUS371901EB Troubleshooting by Error Code 3.54 Compressor Overcurrent Applicable All outdoor 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 376 Troubleshooting by Error Code SiUS371901EB Power OFF CHECK 4 Is the power Replace the inverter PCB. transistor normal? (*1) 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 377: Compressor Startup Abnormality

    SiUS371901EB Troubleshooting by Error Code 3.55 Compressor Startup Abnormality Applicable All outdoor 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 378 Troubleshooting by Error Code SiUS371901EB Refrigerant is stagnated. (The unit is out Solve the refrigerant stagnation. of power supply for more (Power should be supplied for more than 6 hours.) than 6 hours.) Is the insulation resistance of the Replace the compressor. relevant compressor 100 k: or more? The internal...

  • Page 379: Transmission Error Between Inverter Pcb And Outdoor Unit Main Pcb

    SiUS371901EB Troubleshooting by Error Code 3.56 Transmission Error between Inverter PCB and Outdoor Unit Main PCB Applicable All outdoor unit models Models Error Code Method of Error Check for the transmission conditions between the inverter PCB and the outdoor unit main PCB Detection using a microcomputer.
  • Page 380 Troubleshooting by Error Code SiUS371901EB microcomputer normal monitor indication This is not the LC error. lamp (green) on the outdoor Recheck the error code. unit main PCB (A1P) is blinking. microcomputer normal monitor indication The fuse of the Replace the inverter PCB ( 2). lamp (green) on the outdoor noise filter PCB has unit main PCB (A1P) is...

  • Page 381: Power Supply Voltage Imbalance

    SiUS371901EB Troubleshooting by Error Code 3.57 Power Supply Voltage Imbalance Applicable All outdoor 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 382  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 383: Reactor Surface Thermistor Abnormality

    SiUS371901EB Troubleshooting by Error Code 3.58 Reactor Surface Thermistor Abnormality Applicable REYQ72-120XATJU(A) Models 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 384: Inverter Radiation Fin Temperature Abnormality

    Troubleshooting by Error Code SiUS371901EB 3.59 Inverter Radiation Fin Temperature Abnormality 3.59.1 Inverter Radiation Fin Temperature Abnormality (Inverter PCB) Applicable All outdoor unit models Models Error Code Sub code: 09-11 Method of Error Detect the resistance of the following thermistors while the compressor is not running: Detection ...
  • Page 385 SiUS371901EB Troubleshooting by Error Code 3.59.2 Inverter Radiation Fin Temperature Abnormality (Fan PCB) Applicable All outdoor unit models Models Error Code Sub code: 02, 03, 15-18 Method of Error Detects the resistance of the thermistor located inside the fan PCB circuit while the fan motor is not Detection in operation.

  • Page 386: Field Setting After Replacing Outdoor Unit Main Pcb Abnormality Or Combination Of Pcb Abnormality

    Troubleshooting by Error Code SiUS371901EB 3.60 Field Setting after Replacing Outdoor Unit Main PCB Abnormality or Combination of PCB Abnormality Applicable All outdoor unit models Models Error Code Method of Error This error is detected according to communications with the inverter PCB. Detection Error Decision Make judgement according to communication data on whether or not the type of the inverter PCB is...

  • Page 387: Refrigerant Shortage

    SiUS371901EB Troubleshooting by Error Code 3.61 Refrigerant Shortage Applicable All outdoor unit models Models Error Code Method of Error Detect refrigerant shortage according to a low pressure level or a difference in heat exchanging Detection temperature from the suction pipe. Error Decision Low pressure becomes 0.1 MPa (14.5 psi) or less.

  • Page 388: Reverse Phase, Open Phase

    Troubleshooting by Error Code SiUS371901EB 3.62 Reverse Phase, Open Phase 3.62.1 Reverse Phase, Open Phase (Except REYQ72-120XAYDU(A)) Applicable REYQ72-168XATJU(A), REYQ144/168XAYDU(A), REYQ72-168XAYCU(A) Models 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 389 SiUS371901EB Troubleshooting by Error Code 3.62.2 Reverse Phase, Open Phase (REYQ72-120XAYDU(A)) Applicable REYQ72-120XAYDU(A) Models 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. Error Decision When a power supply is reverse phase, or T phase is open phase.

  • Page 390: Power Supply Insufficient Or Instantaneous Abnormality

    Troubleshooting by Error Code SiUS371901EB 3.63 Power Supply Insufficient or Instantaneous Abnormality Applicable All outdoor unit models Models Error Code Method of Error Detect the voltage of capacitor of the main circuit in the inverter PCB. Detection Error Decision When the voltage in the DC circuit (between diode module and power module) falls below 190 VDC Conditions (for 208/230 V models), 380 VDC (for 460 V models) or 560 VDC (for 575 V models).
  • Page 391 SiUS371901EB Troubleshooting by Error Code The insulation resistance of the fan Replace the fan motor motor is not more than (M1F, M2F). 1 M:. If the motor gets severely damaged, the inverter PCB should also be replaced. CHECK 4 Is the power Replace the inverter PCB.

  • Page 392: Check Operation Not Executed

    Troubleshooting by Error Code SiUS371901EB 3.64 Check Operation Not Executed Applicable All outdoor 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 393: Transmission Error Between Indoor Units And Outdoor Units, Open Phase In Power Supply Wiring

    SiUS371901EB Troubleshooting by Error Code 3.65 Transmission Error between Indoor Units and Outdoor Units, Open Phase in Power Supply Wiring Applicable All indoor unit models Models All outdoor unit models Error Code Method of Error Microcomputer checks if transmission between indoor and outdoor units is normal. Detection Error Decision Transmission is not carried out normally for a certain amount of time.
  • Page 394 Troubleshooting by Error Code SiUS371901EB 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 Refer to troubleshooting U4-03 (Indoor unit system transmission error) Check the power supply wiring.
  • Page 395 SiUS371901EB Troubleshooting by Error Code Are the indoor-outdoor and outdoor-outdoor Modify the transmission transmission wirings wirings. normal? Disconnect the outdoor-outdoor transmission wiring. Replace the outdoor unit main Does the system normally PCB (A1P). operate with a single transmission line? Mount the DIII-NET extension adaptor.

  • Page 396: Transmission Error Between Remote Controller And Indoor Unit

    Troubleshooting by Error Code SiUS371901EB 3.66 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 397: Transmission Error Between Outdoor Units

    SiUS371901EB Troubleshooting by Error Code 3.67 Transmission Error between Outdoor Units Applicable All outdoor unit models Models Error Code Method of Error Microcomputer checks if transmission between outdoor units is normal. Detection Error Decision When transmission is not carried out normally for a certain amount of time Conditions Supposed ...
  • Page 398 Troubleshooting by Error Code SiUS371901EB 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 399 SiUS371901EB Troubleshooting by Error Code 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 outdoor unit.
  • Page 400 Troubleshooting by Error Code SiUS371901EB Diagnosis Flowchart-2 U7-02 Error code Sub code (Transmission error when the external control adaptor for outdoor unit is mounted) Unified Cool/ Heat Set Cool/Heat selection selection for the external control adaptor for outdoor unit to “IND.” Cool/Heat selection for the external control adaptor...
  • Page 401 SiUS371901EB Troubleshooting by Error Code 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 outdoor unit main caused wiring disconnection in PCB (A1P) for multi slave 1. them or are being disconnected.
  • Page 402 Troubleshooting by Error Code SiUS371901EB Diagnosis Flowchart-6 U7-06 Error code Sub code (Manual address setting error for slave 1, 2) One of outdoor unit multi transmission wirings has Replace the outdoor unit main caused wiring disconnection in it PCB (A1P). or been disconnected.

  • Page 403: Transmission Error Between Main And Sub Remote Controllers

    SiUS371901EB Troubleshooting by Error Code 3.68 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 404: Transmission Error Between Indoor Units And Outdoor Units In The Same System

    Troubleshooting by Error Code SiUS371901EB 3.69 Transmission Error between Indoor Units and Outdoor Units in the Same System Applicable All indoor unit models Models All outdoor unit models Error Code Method of Error Detect the error signal for the other indoor unit within the circuit by outdoor unit main PCB. Detection Error Decision When the error decision is made on any other indoor unit within the system concerned...

  • Page 405: Improper Combination Of Indoor, Branch Selector And Outdoor Units

    SiUS371901EB Troubleshooting by Error Code 3.70 Improper Combination of Indoor, Branch Selector and Outdoor Units Applicable All indoor unit models Models Branch Selector unit All outdoor unit models Error Code Method of Error  A difference occurs in data by the type of refrigerant between indoor, Branch Selector and Detection outdoor units.
  • Page 406 Troubleshooting by Error Code SiUS371901EB 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 407 SiUS371901EB Troubleshooting by Error Code Diagnosis Flowchart-1 UA-17 Error code Sub code number of indoor Is the units connected to the model of indoor unit Replace the outdoor unit main same system is not FXTQ-TA? PCB (A1P). more than 64. Incorrect electric heater capacity setting...
  • Page 408 Troubleshooting by Error Code SiUS371901EB Diagnosis Flowchart-3 UA-20 Error code Sub code Multi connection? Replace the outdoor unit main PCB (A1P). Was the outdoor unit different model Replace the outdoor unit main main PCB replaced with of outdoor unit is PCB (A1P).
  • Page 409 SiUS371901EB Troubleshooting by Error Code Diagnosis Flowchart-5 UA-25 Error code Sub code Is the wiring between outdoor unit Correct the wiring. and Branch Selector unit correct? Replace the outdoor unit main PCB (A1P). Diagnosis Flowchart-6 UA-26 Error code Sub code Is the wiring between Branch Selector Correct the wiring.
  • Page 410 Troubleshooting by Error Code SiUS371901EB Diagnosis Flowchart-7 UA-27 Error code Sub code the transmission wires between indoor unit and Correct the transmission wires. Branch Selector unit correct? Is the Branch Selector unit PCB Replace the indoor unit PCB or the correct? Branch Selector unit PCB.
  • Page 411 SiUS371901EB Troubleshooting by Error Code Diagnosis Flowchart-9 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 412: Incorrect Gas Furnace Connecting Number

    Troubleshooting by Error Code SiUS371901EB 3.71 Incorrect Gas Furnace Connecting Number Applicable CXTQ-TA Models Error Code Outline Two or more "CXTQ-TA + gas furnace" and other indoor units other than CXTQ-TA are connected. Error Decision Check that two or more "CXTQ-TA + gas furnace" and other indoor units other than CXTQ-TA are Conditions not connected.

  • Page 413: Incorrect Electric Heater Capacity Setting

    SiUS371901EB Troubleshooting by Error Code 3.72 Incorrect Electric Heater Capacity Setting Applicable FXTQ-TA 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 414: Address Duplication Of Centralized Controller

    Troubleshooting by Error Code SiUS371901EB 3.73 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 415: Transmission Error Between Centralized Controller And Indoor Unit

    SiUS371901EB Troubleshooting by Error Code 3.74 Transmission Error between Centralized Controller and Indoor Unit Applicable All indoor unit models Models Central remote 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 416 Troubleshooting by Error Code SiUS371901EB 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 error UE caused on all Go to the next page.
  • Page 417 SiUS371901EB 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 418: System Not Set Yet

    Troubleshooting by Error Code SiUS371901EB 3.75 System Not Set Yet Applicable All indoor unit models Models All outdoor 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 419: System Abnormality, Refrigerant System Address Undefined

    SiUS371901EB Troubleshooting by Error Code 3.76 System Abnormality, Refrigerant System Address Undefined Applicable All indoor unit models Models All outdoor 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 outdoor unit when connected to the power after installation or wiring replacement (with the RETURN (BS3)
  • Page 420 Troubleshooting by Error Code SiUS371901EB Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Does electricity an error occur being introduced even after 12 minutes for the first time after elapses from the time when Normal installation or after an indoor...

  • Page 421: Climate Talk Communication System Combination Error (Before Initial Setting For Communication Completes)

    SiUS371901EB Troubleshooting by Error Code 3.77 Climate Talk Communication System Combination Error (Before Initial Setting for Communication Completes) Applicable CXTQ-TA Models UH-05 Error Code Method of Error Detects the type of the devices constituted in Climate Talk Communication. Detection Error Decision The error decision is made when any of the following conditions is established before elapsing 4 Conditions minutes after the power is turned ON.

  • Page 422: Climate Talk Communication System Combination Error (After Initial Setting For Communication Completes)

    Troubleshooting by Error Code SiUS371901EB 3.78 Climate Talk Communication System Combination Error (After Initial Setting for Communication Completes) Applicable CXTQ-TA Models UH-06 Error Code Method of Error Detects the type of the devices constituted in Climate Talk Communication. Detection Error Decision The error decision is made when any of the following conditions is established once the initial Conditions setting for communication with the gas furnace completes and after elapsing 4 minutes after the...

  • Page 423: Check

    SiUS371901EB 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 pressure Bent or crashed pipe Conduct visual checks for pipe conditions.

  • Page 424: Low Pressure Check

    Check SiUS371901EB Low Pressure Check CHECK 2 Referring to the Fault Tree Analysis (FTA) shown below, probe the defective points [In cooling] Defective low pressure Is the pressure value checked with the Service Checker (1.) sensor Defective corresponding to the measurement value of the pressure sensor? compressor Defective Defective outdoor unit...
  • Page 425 SiUS371901EB Check ∗4. In heating, the outdoor unit electronic expansion valve (main) is used for superheating degree control of outdoor heat exchanger. Reference CHECK 7 Refer to page 427. Reference CHECK 8 Refer to page 428. Part 6 Service Diagnosis...

  • Page 426: Superheat Operation Check

    Check SiUS371901EB Superheat Operation Check CHECK 3 Referring to the Fault Tree Analysis (FTA) shown below, probe the defective points Hot gas circuit clogging Defective hot Defective solenoid gas bypass Are the coil resistance and insulation normal? valve coil control Defective solenoid valve body (1)
  • Page 427 SiUS371901EB Check ∗4. Judgment criteria of superheat operation: (1) Suction gas superheating degree: 10°C (18°F) and over. (2) Discharge gas superheating degree: 45°C (81°F) and over, except immediately after compressor starts up or is running under dropping control. (Use the above values as a guide. Depending on the other conditions, the unit may be normal despite the values within the above range.) Reference CHECK 7 Refer to page 427.

  • Page 428: Power Transistor Check

    Check SiUS371901EB 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 ∗ Prepare the analog type of multimeter. h Multimeter For the digital type of multimeter, those with diode check function are available for...
  • Page 429 SiUS371901EB Check REYQ144/168XATJU(A) Point of Measurement and Judgment Criteria  Turn OFF the power supply. Then, after a lapse of 10 minutes or more, make measurement of resistance. When using the analog type of multimeter, When using the digital type of Measuring make measurement in resistance multimeter, make measurement in...
  • Page 430 Check SiUS371901EB REYQ72-120XAYDU(A) Point of Measurement and Judgment Criteria  Turn OFF the power supply. Then, after a lapse of 10 minutes or more, make measurement of resistance. When using the analog type of multimeter, When using the digital type of Measuring make measurement in resistance multimeter, make measurement in...
  • Page 431 SiUS371901EB Check REYQ144/168XAYDU(A) Point of Measurement and Judgment Criteria  Turn OFF the power supply. Then, after a lapse of 10 minutes or more, make measurement of resistance. When using the analog type of multimeter, When using the digital type of Measuring make measurement in resistance multimeter, make measurement in...
  • Page 432 Check SiUS371901EB REYQ72-168XAYCU(A) Point of Measurement and Judgment Criteria  Turn OFF the power supply. Then, after a lapse of 10 minutes or more, make measurement of resistance. When using the analog type of multimeter, When using the digital type of Measuring make measurement in resistance multimeter, make measurement in...

  • Page 433: Refrigerant Overcharge Check

    SiUS371901EB Check 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 judgment, refer to the information below. Diagnosis of refrigerant overcharge 1.

  • Page 434: Refrigerant Shortage Check

    Check SiUS371901EB 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 435: Vacuuming And Dehydration Procedure

    SiUS371901EB Check 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 436: Thermistor Check

    Check SiUS371901EB 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-T Type C Type J – FXZQ-TA Type B – Type A FXUQ-P Type C –...
  • Page 437 SiUS371901EB Check Thermistor temperature Resistance (kΩ) (°C) (°F) Type A Type B Type C –30 –22 363.8 361.7719 – –25 –13 266.8 265.4704 – –20 –4 197.8 196.9198 – –15 148.2 147.5687 – –10 112.0 111.6578 111.8 –5 85.52 85.2610 85.42 65.84 65.6705...
  • Page 438 Check SiUS371901EB Thermistor temperature Resistance (kΩ) (°C) (°F) Type E Type H Type J –30 –22 362.4862 3257.371 359.8518 –25 –13 265.9943 2429.222 265.0699 –20 –4 197.3083 1827.883 197.1476 –15 147.8597 1387.099 147.7348 –10 111.8780 1061.098 111.7984 –5 85.4291 817.9329 85.3927 65.8000 635.0831...

  • Page 439: Pressure Sensor Check

    SiUS371901EB Check 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) 40.8...

  • Page 440: Broken Wire Check Of The Relay Wires

    Check SiUS371901EB 4.10 Broken Wire Check of the Relay Wires CHECK 15 1. Procedure for checking outdoor-outdoor unit transmission wiring for broken wires On the system shown below, turn OFF the power supply to all equipment, short circuit between the outdoor-outdoor unit terminal F1 and F2 in the "Outdoor 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 441 SiUS371901EB Check 1. Short circuit between the outdoor-outdoor unit terminal parts. Outdoor-outdoor Unit 2. Short circuit between Transmission Wiring the indoor-outdoor unit 2. Check the transmission terminal parts. wiring for continuity. Indoor-outdoor Unit If there is continuity, the Transmission Wiring indoor-outdoor unit transmission has no broken wires in it.

  • Page 442: Fan Motor Connector Check (Power Supply Cable)

    Check SiUS371901EB 4.11 Fan Motor Connector Check (Power Supply Cable) CHECK 16 1. Turn OFF the power supply. 2. Measure the resistance between phases of U, V, W at the motor side connectors (3-core wire) to check that the values are balanced and there is no short circuiting, while connector or relay connector is disconnected.
  • Page 443 SiUS371901EB Check Outdoor unit 1. Turn OFF the power supply. Measure the resistance between phases of U, V, W at the motor side connectors (3-core wire) to check that the values are balanced and there is no short circuiting, while connector or relay connector is disconnected.

  • Page 444: Fan Motor Connector Check (Signal Cable)

    Check SiUS371901EB 4.12 Fan Motor Connector Check (Signal Cable) CHECK 17 Resistance measuring points and judgment criteria. Indoor Unit FXFQ-T, FXZQ-TA, FXUQ-P, FXSQ05-48TA, FXMQ07-12PB, FXAQ-P White Orange Brown Blue — — — — Judgment criteria Measuring points Criteria 1 - 4 1 Ω...
  • Page 445 SiUS371901EB Check FXSQ54TA, FXMQ15-54PB Gray (5) Pink (4) Orange (3) Blue (2) Yellow (1) Judgment criteria Measuring points Criteria 1 Ω or more 5 - 4 5 - 3 1 Ω or more 1 Ω or more 5 - 2 5 - 1 1 Ω...

  • Page 446: Electronic Expansion Valve Coil Check

    Check SiUS371901EB 4.13 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. Outdoor unit Y1E, Y3E, Y4E White (1)
  • Page 447 SiUS371901EB Check Y2E, Y5E Orange (1) Red (2) Yellow (3) Black (4) — (5) Gray (6) Measuring points Judgment criteria 1 - 6 2 - 6 35-55 Ω 3 - 6 4 - 6 Indoor unit FXFQ-T, FXZQ-TA, FXUQ-P, FXEQ-P, FXSQ-TA, FXTQ-TA, CXTQ-TA Orange (1) Red (2) Yellow (3)
  • Page 448 Check SiUS371901EB FXDQ-M, FXMQ-M, FXHQ-M, FXLQ-M, FXNQ-M, FXMQ-MF Blue Brown Orange Yellow Red White Measuring points Judgment criteria 300 Ω 1 - 3 150 Ω 1 - 5 300 Ω 2 - 4 150 Ω 2 - 6 Branch Selector unit (EVSC) White (1) White (1)

  • Page 449: Fan Motor Connector Check For Fxtq-Ta

    SiUS371901EB Check 4.14 Fan Motor Connector Check for FXTQ-TA CHECK 19 CHECKING EMERSON ULTRATECH ECM MOTORS The FXTQ-TA 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 450 Check SiUS371901EB Depress the orange power button on the diagnostic tool to send a run signal to the motor. Allow up to 5 seconds for the motor to start. NOTE: If the orange power button does not illuminate when depressed, the tool either has an open fuse or is not properly connected to a 24VAC source.
  • Page 451 SiUS371901EB Check Measure voltage between pins 5 and 3. Voltage should be approximately half of the voltage measured in step 4. If no voltage is present, check supply voltage to air handler or modular blower. Disconnect power to air handler or modular blower. Reconnect the 5-circuit power harness disconnected in step 2.
  • Page 452 Check SiUS371901EB Inspect the large capacitors inside the control/end bell. Replace the control/end bell if any of the capacitors are bulging or swollen. 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 MΩ or greater, the control/end bell is functioning properly.

  • Page 453: Part 7 Appendix

    SiUS371901EB Part 7 Appendix 1. Wiring Diagrams..................447 1.1 Outdoor Unit ..................... 447 1.2 Indoor Unit....................452 1.3 Air Treatment Equipment ................. 466 1.4 Branch Selector Unit ................469 Part 7 Appendix...

  • Page 454: Wiring Diagrams

    Wiring Diagrams SiUS371901EB 1. Wiring Diagrams Outdoor Unit REYQ72/96/120XATJU, REYQ72/96/120XATJA Part 7 Appendix...
  • Page 455 SiUS371901EB Wiring Diagrams REYQ144/168XATJU, REYQ144/168XATJA Part 7 Appendix...
  • Page 456 Wiring Diagrams SiUS371901EB REYQ72/96/120XAYDU, REYQ72/96/120XAYDA Part 7 Appendix...
  • Page 457 SiUS371901EB Wiring Diagrams REYQ144/168XAYDU, REYQ144/168XAYDA Part 7 Appendix...
  • Page 458 Wiring Diagrams SiUS371901EB REYQ72/96/120/144/168XAYCU, REYQ72/96/120/144/168XAYCA Part 7 Appendix...

  • Page 459: Indoor Unit

    SiUS371901EB Wiring Diagrams Indoor Unit FXFQ07/09/12/15/18/24/30/36/48TVJU* Part 7 Appendix...
  • Page 460 Wiring Diagrams SiUS371901EB BYCQ125BGW1 (Self-Cleaning Decoration Panel for FXFQ-TVJU*) Part 7 Appendix...
  • Page 461 SiUS371901EB Wiring Diagrams FXZQ05/07/09/12/15/18TAVJU* Part 7 Appendix...
  • Page 462 Wiring Diagrams SiUS371901EB FXUQ18/24/30/36PVJU* Part 7 Appendix...
  • Page 463 SiUS371901EB Wiring Diagrams FXEQ07/09/12/15/18/24PVJU* Part 7 Appendix...
  • Page 464 Wiring Diagrams SiUS371901EB FXDQ07/09/12/18/24MVJU* Part 7 Appendix...
  • Page 465 SiUS371901EB Wiring Diagrams FXSQ05/07/09/12/15/18/24/30/36/48/54TAVJU* Part 7 Appendix...
  • Page 466 Wiring Diagrams SiUS371901EB FXMQ07/09/12/15/18/24/30/36/48/54PBVJU* Part 7 Appendix...
  • Page 467 SiUS371901EB Wiring Diagrams FXMQ72/96MVJU* Part 7 Appendix...
  • Page 468 Wiring Diagrams SiUS371901EB FXHQ12/24/36MVJU* Part 7 Appendix...
  • Page 469 SiUS371901EB Wiring Diagrams FXAQ07/09/12/18/24PVJU* Part 7 Appendix...
  • Page 470 Wiring Diagrams SiUS371901EB FXLQ07/09/12/18/24MVJU*, FXNQ07/09/12/18/24MVJU* Part 7 Appendix...
  • Page 471 SiUS371901EB Wiring Diagrams FXTQ09/12/18/24/30/36/42/48/54/60TAVJUA(D)* Part 7 Appendix...
  • Page 472 Wiring Diagrams SiUS371901EB CXTQ24/36/48/60TASBLU* Part 7 Appendix...

  • Page 473: Air Treatment Equipment

    SiUS371901EB Wiring Diagrams Air Treatment Equipment 1.3.1 Outdoor-Air Processing Unit FXMQ48/72/96MFVJU* Part 7 Appendix...
  • Page 474 Wiring Diagrams SiUS371901EB 1.3.2 Energy Recovery Ventilator (VAM Series) VAM300/470/600GVJU* Part 7 Appendix...
  • Page 475 SiUS371901EB Wiring Diagrams VAM1200GVJU* Part 7 Appendix...

  • Page 476: Branch Selector Unit

    Wiring Diagrams SiUS371901EB Branch Selector Unit 1.4.1 Single Branch Selector Unit BSQ36/60/96TVJ Part 7 Appendix...
  • Page 477 SiUS371901EB Wiring Diagrams 1.4.2 Multi Branch Selector Unit (Standard Series) BS4Q54TVJ Part 7 Appendix...
  • Page 478 Wiring Diagrams SiUS371901EB BS6/8Q54TVJ Part 7 Appendix...
  • Page 479 SiUS371901EB Wiring Diagrams BS10/12Q54TVJ Part 7 Appendix...
  • Page 480 Wiring Diagrams SiUS371901EB 1.4.3 Multi Branch Selector Unit (Flex Series) BSF4Q54TVJ 3D123904A Part 7 Appendix...
  • Page 481 SiUS371901EB Wiring Diagrams BSF6/8Q54TVJ Part 7 Appendix...
  • Page 482 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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