Daikin VRV EMERION RXYQ-AATJA Service Manual
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Daikin VRV EMERION RXYQ-AATJA Service Manual

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SiUS342303E
Service
Manual
RXYQ-AATJA, 208/230 V
RXYQ-AAYDA, 460 V
Heat Pump 60 Hz

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Summary of Contents for Daikin VRV EMERION RXYQ-AATJA

  • Page 1 SiUS342303E Service Manual RXYQ-AATJA, 208/230 V RXYQ-AAYDA, 460 V Heat Pump 60 Hz...

  • Page 2: Table Of Contents

    SiUS342303E 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 Outdoor Unit ....................
  • Page 3 SiUS342303E 2.3 Wireless Remote Controller ............... 80 3. Main/Sub Setting..................81 3.1 BRC1E73 ....................81 3.2 BRC1H71W....................83 3.3 When Wireless Remote Controller is Used Together......... 85 4. Address Setting for Wireless Remote Controller........86 5. Centralized Control Group No. Setting............88 5.1 BRC1E73 ....................88 5.2 BRC1H71W....................
  • Page 4 SiUS342303E 9. Outline of Control (Indoor Unit) ...............121 9.1 Operation Flowchart ................. 121 9.2 Set Temperature and Control Target Temperature........125 9.3 Remote Controller Thermistor ..............127 9.4 Thermostat Control................... 129 9.5 Drain Pump Control.................. 132 9.6 Control of Electronic Expansion Valve ............. 134 9.7 Freeze-Up Prevention Control..............
  • Page 5 SiUS342303E 1.3 With Gas Furnace ..................229 1.4 Gas Furnace Lockout Reset..............229 1.5 With Infrared Presence/Floor Sensor ............230 2. Troubleshooting with Remote Controller..........231 2.1 BRC1E73 ....................231 2.2 BRC1H71W....................232 2.3 Wireless Remote Controller ..............232 3. Troubleshooting by Error Code ...............234 3.1 Error Codes and Descriptions ..............
  • Page 6 SiUS342303E 3.40 Electronic Expansion Valve Coil Abnormality or Sub PCB Momentary Overcurrent ....................311 3.41 Discharge Pipe Temperature Abnormality ..........312 3.42 Wet Alarm....................314 3.43 Refrigerant Overcharged................316 3.44 Thermistor Abnormality ................317 3.45 Harness Abnormality (between Outdoor Unit Main PCB and Inverter PCB)......................
  • Page 7 SiUS342303E 4.6 Refrigerant Shortage Check..............379 4.7 Vacuuming and Dehydration Procedure ..........380 4.8 Thermistor Check ..................381 4.9 Pressure Sensor Check ................384 4.10 Broken Wire Check of the Relay Wires ............ 385 4.11 Fan Motor Connector Check (Power Supply Cable) ........ 386 4.12 Fan Motor Connector Check (Signal Cable) ..........

  • Page 8: Introduction

    SiUS342303E 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

    SiUS342303E 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 SiUS342303E 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

    SiUS342303E 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 SiUS342303E 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 SiUS342303E Safety Cautions Caution Be sure to measure insulation resistance after the repair, and make sure that the resistance is 1 M or greater. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage may cause water to enter the room and wet the furniture and floor.

  • Page 14: Icons Used

    Icons Used SiUS342303E 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

    SiUS342303E Revision History 3. Revision History Month / Year Version Revised contents 04 / 2023 SiUS342303E First edition Introduction...

  • Page 16: Part 1 General Information

    SiUS342303E Part 1 General Information 1. Model Names ....................10 1.1 Outdoor Unit ....................10 1.2 Indoor Unit....................11 1.3 Air Treatment Equipment ................11 2. External Appearance.................12 2.1 Outdoor Unit ....................12 2.2 Indoor Unit....................14 2.3 Air Treatment Equipment ................15 3.

  • Page 17: Model Names

    SiUS342303E Model Names 1. Model Names Outdoor Unit RXYQ-AATJA (208/230 V) Capacity range (ton) Power supply, Revision Capacity index Heat pump RXYQ 72AA 96AA 120AA 144AA 168AA 192AA 216AA 240AA 264AA Capacity range (ton) Power supply, Revision Capacity index Heat pump RXYQ 288AA 312AA...

  • Page 18: Indoor Unit

    Model Names SiUS342303E 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 05TB 07TB 09TB 12TB 15TB 18TB — —...

  • Page 19: External Appearance

    SiUS342303E External Appearance 2. External Appearance Outdoor Unit Single Outdoor Unit RXYQ72AATJA RXYQ72AAYDA 6 ton RXYQ96AATJA RXYQ120AATJA RXYQ96AAYDA RXYQ120AAYDA RXYQ144AATJA RXYQ168AATJA RXYQ144AAYDA RXYQ168AAYDA 8, 10, 12, 14 ton RXYQ192AATJA RXYQ216AATJA RXYQ240AATJA RXYQ192AAYDA RXYQ216AAYDA RXYQ240AAYDA 16, 18, 20 ton Part 1 General Information...
  • Page 20 External Appearance SiUS342303E Double Outdoor Unit RXYQ264AATJA RXYQ288AATJA RXYQ264AAYDA RXYQ288AAYDA RXYQ312AATJA RXYQ336AATJA RXYQ312AAYDA RXYQ336AAYDA 22, 24, 26, 28 ton RXYQ360AATJA RXYQ360AAYDA 30 ton RXYQ384AATJA RXYQ408AATJA RXYQ432AATJA RXYQ384AAYDA RXYQ408AAYDA RXYQ432AAYDA RXYQ456AATJA RXYQ480AATJA RXYQ456AAYDA RXYQ480AAYDA 32, 34, 36, 38, 40 ton Part 1 General Information...

  • Page 21: Indoor Unit

    SiUS342303E External Appearance Indoor Unit Ceiling mounted cassette (Round flow with sensing) type Ceiling mounted duct type (High static pressure) FXFQ-T FXMQ-TB Shown with BYCQ125B-W1 VISTA 2'×2' cassette type Ceiling mounted duct type FXZQ-TB FXMQ-M Shown with BYFQ60C3W2W 4 way blow ceiling suspended type Ceiling suspended type FXUQ-PA FXHQ-M...

  • Page 22: Air Treatment Equipment

    External Appearance SiUS342303E Cased coil unit Low-temperature hydrobox CXTQ-TA HXY-TA Air Treatment Equipment Outdoor-air processing unit Energy recovery ventilator (VAM series) FXMQ-MF VAM-G Part 1 General Information...

  • Page 23: Combination Of Outdoor Units

    SiUS342303E Combination of Outdoor Units 3. Combination of Outdoor Units Module System capacity Number Outdoor unit multi (Ton) of units connection piping kit 1 — BHFP22P100U BHFP22P100UA KHFP26P100UA 2 Notes: 1. For multiple connection, the outdoor unit multi connection piping kit (separately sold) is required. 2.

  • Page 24: Capacity Range

    Capacity Range SiUS342303E 4. Capacity Range Connection Ratio Total capacity index of the indoor units Connection ratio = Capacity index of the outdoor units Max. connection ratio Types of connected Type of connected air treatment Low-temperature indoor units equipment hydrobox 4 Min.

  • Page 25: Outdoor Unit Combinations

    SiUS342303E Capacity Range Outdoor Unit Combinations Capacity range (Ton) 72AATJA 96AATJA 120AATJA 144AATJA 168AATJA 192AATJA 216AATJA RXYQ 72AAYDA 96AAYDA 120AAYDA 144AAYDA 168AAYDA 192AAYDA 216AAYDA Maximum number of connectable indoor units Maximum number of connectable hydrobox Total capacity index of 36-93 48-124 60-156 72-187...

  • Page 26: Specifications

    Specifications SiUS342303E 5. Specifications RXYQ-AATJA Model name RXYQ72AATJA RXYQ96AATJA Power supply 3 phase, 208/230 V, 60 Hz 3 phase, 208/230 V, 60 Hz 1 Cooling Nominal 72,000 (21.1) 96,000 (28.1) Btu/h capacity (kW) Rated 69,000 (20.2) 92,000 (27.0) 2 Heating Nominal 81,000 (23.7) 108,000 (31.7)
  • Page 27 SiUS342303E Specifications Model name RXYQ120AATJA RXYQ144AATJA Power supply 3 phase, 208/230 V, 60 Hz 3 phase, 208/230 V, 60 Hz 1 Cooling Nominal 120,000 (35.2) 144,000 (42.2) Btu/h capacity (kW) Rated 114,000 (33.4) 138,000 (40.4) 2 Heating Nominal 135,000 (39.6) 162,000 (47.5) Btu/h capacity...
  • Page 28 Specifications SiUS342303E Model name RXYQ168AATJA RXYQ192AATJA Power supply 3 phase, 208/230 V, 60 Hz 3 phase, 208/230 V, 60 Hz 1 Cooling Nominal 168,000 (49.2) 192,000 (56.3) Btu/h capacity (kW) Rated 160,000 (46.9) 184,000 (53.9) 2 Heating Nominal 189,000 (55.4) 216,000 (63.3) Btu/h capacity...
  • Page 29 SiUS342303E Specifications Model name RXYQ216AATJA RXYQ240AATJA Power supply 3 phase, 208/230 V, 60 Hz 3 phase, 208/230 V, 60 Hz 1 Cooling Nominal 216,000 (63.3) 240,000 (70.3) Btu/h capacity (kW) Rated 206,000 (60.4) 228,000 (66.8) 2 Heating Nominal 243,000 (71.2) 270,000 (79.1) Btu/h capacity...
  • Page 30 Specifications SiUS342303E Model name (Combination unit) RXYQ264AATJA RXYQ288AATJA RXYQ120AATJA RXYQ144AATJA Model name (Independent unit) RXYQ144AATJA RXYQ144AATJA Power supply 3 phase, 208/230 V, 60 Hz 3 phase, 208/230 V, 60 Hz 1 Cooling Nominal 264,000 (77.4) 288,000 (84.4) Btu/h capacity (kW) Rated 252,000 (73.9) 274,000 (80.3)
  • Page 31 SiUS342303E Specifications Model name (Combination unit) RXYQ312AATJA RXYQ336AATJA RXYQ144AATJA RXYQ168AATJA Model name (Independent unit) RXYQ168AATJA RXYQ168AATJA Power supply 3 phase, 208/230 V, 60 Hz 3 phase, 208/230 V, 60 Hz 1 Cooling Nominal 312,000 (91.4) 336,000 (98.5) Btu/h capacity (kW) Rated 296,000 (86.7) 320,000 (93.8)
  • Page 32 Specifications SiUS342303E Model name (Combination unit) RXYQ360AATJA RXYQ384AATJA RXYQ168AATJA RXYQ192AATJA Model name (Independent unit) RXYQ192AATJA RXYQ192AATJA Power supply 3 phase, 208/230 V, 60 Hz 3 phase, 208/230 V, 60 Hz 1 Cooling Nominal 360,000 (106) 384,000 (113) Btu/h capacity (kW) Rated 342,000 (100) 364,000 (107)
  • Page 33 SiUS342303E Specifications Model name (Combination unit) RXYQ408AATJA RXYQ432AATJA RXYQ192AATJA RXYQ216AATJA Model name (Independent unit) RXYQ216AATJA RXYQ216AATJA Power supply 3 phase, 208/230 V, 60 Hz 3 phase, 208/230 V, 60 Hz 1 Cooling Nominal 408,000 (120) 432,000 (127) Btu/h capacity (kW) Rated 388,000 (114) 410,000 (120)
  • Page 34 Specifications SiUS342303E Model name (Combination unit) RXYQ456AATJA RXYQ480AATJA RXYQ216AATJA RXYQ240AATJA Model name (Independent unit) RXYQ240AATJA RXYQ240AATJA Power supply 3 phase, 208/230 V, 60 Hz 3 phase, 208/230 V, 60 Hz 1 Cooling Nominal 456,000 (134) 480,000 (141) Btu/h capacity (kW) Rated 434,000 (127) 456,000 (134)

  • Page 35: Rxyq-Aayda

    SiUS342303E Specifications RXYQ-AAYDA Model name RXYQ72AAYDA RXYQ96AAYDA Power supply 3 phase, 460 V, 60 Hz 3 phase, 460 V, 60 Hz 1 Cooling Nominal 72,000 (21.1) 96,000 (28.1) Btu/h capacity (kW) Rated 69,000 (20.2) 92,000 (27.0) 2 Heating Nominal 81,000 (23.7) 108,000 (31.7) Btu/h capacity...
  • Page 36 Specifications SiUS342303E Model name RXYQ120AAYDA RXYQ144AAYDA Power supply 3 phase, 460 V, 60 Hz 3 phase, 460 V, 60 Hz 1 Cooling Nominal 120,000 (35.2) 144,000 (42.2) Btu/h capacity (kW) Rated 114,000 (33.4) 138,000 (40.4) 2 Heating Nominal 135,000 (39.6) 162,000 (47.5) Btu/h capacity...
  • Page 37 SiUS342303E Specifications Model name RXYQ168AAYDA RXYQ192AAYDA Power supply 3 phase, 460 V, 60 Hz 3 phase, 460 V, 60 Hz 1 Cooling Nominal 168,000 (49.2) 192,000 (56.3) Btu/h capacity (kW) Rated 160,000 (46.9) 184,000 (53.9) 2 Heating Nominal 189,000 (55.4) 216,000 (63.3) Btu/h capacity...
  • Page 38 Specifications SiUS342303E Model name RXYQ216AAYDA RXYQ240AAYDA Power supply 3 phase, 460 V, 60 Hz 3 phase, 460 V, 60 Hz 1 Cooling Nominal 216,000 (63.3) 240,000 (70.3) Btu/h capacity (kW) Rated 206,000 (60.4) 228,000 (66.8) 2 Heating Nominal 243,000 (71.2) 270,000 (79.1) Btu/h capacity...
  • Page 39 SiUS342303E Specifications Model name (Combination unit) RXYQ264AAYDA RXYQ288AAYDA RXYQ120AAYDA RXYQ144AAYDA Model name (Independent unit) RXYQ144AAYDA RXYQ144AAYDA Power supply 3 phase, 460 V, 60 Hz 3 phase, 460 V, 60 Hz 1 Cooling Nominal 264,000 (77.4) 288,000 (84.4) Btu/h capacity (kW) Rated 252,000 (73.9) 274,000 (80.3)
  • Page 40 Specifications SiUS342303E Model name (Combination unit) RXYQ312AAYDA RXYQ336AAYDA RXYQ144AAYDA RXYQ168AAYDA Model name (Independent unit) RXYQ168AAYDA RXYQ168AAYDA Power supply 3 phase, 460 V, 60 Hz 3 phase, 460 V, 60 Hz 1 Cooling Nominal 312,000 (91.4) 336,000 (98.5) Btu/h capacity (kW) Rated 296,000 (86.7) 320,000 (93.8)
  • Page 41 SiUS342303E Specifications Model name (Combination unit) RXYQ360AAYDA RXYQ384AAYDA RXYQ168AAYDA RXYQ192AAYDA Model name (Independent unit) RXYQ192AAYDA RXYQ192AAYDA Power supply 3 phase, 460 V, 60 Hz 3 phase, 460 V, 60 Hz 1 Cooling Nominal 360,000 (106) 384,000 (113) Btu/h capacity (kW) Rated 342,000 (100) 364,000 (107)
  • Page 42 Specifications SiUS342303E Model name (Combination unit) RXYQ408AAYDA RXYQ432AAYDA RXYQ192AAYDA RXYQ216AAYDA Model name (Independent unit) RXYQ216AAYDA RXYQ216AAYDA Power supply 3 phase, 460 V, 60 Hz 3 phase, 460 V, 60 Hz 1 Cooling Nominal 408,000 (120) 432,000 (127) Btu/h capacity (kW) Rated 388,000 (114) 410,000 (120)
  • Page 43 SiUS342303E Specifications Model name (Combination unit) RXYQ456AAYDA RXYQ480AAYDA RXYQ216AAYDA RXYQ240AAYDA Model name (Independent unit) RXYQ240AAYDA RXYQ240AAYDA Power supply 3 phase, 460 V, 60 Hz 3 phase, 460 V, 60 Hz 1 Cooling Nominal 456,000 (134) 480,000 (141) Btu/h capacity (kW) Rated 434,000 (127) 456,000 (134)

  • Page 44: Part 2 Refrigerant Circuit

    SiUS342303E Part 2 Refrigerant Circuit 1. Refrigerant Circuit (Piping Diagrams) ............38 1.1 Outdoor Unit ....................38 1.2 Indoor Unit....................43 1.3 Indoor Low-Temperature Hydrobox ............45 1.4 Outdoor-Air Processing Unit............... 46 2. Functional Parts Layout ................47 2.1 RXYQ72AA ....................47 2.2 RXYQ96/120AA ..................

  • Page 45: Refrigerant Circuit (Piping Diagrams)

    SiUS342303E Refrigerant Circuit (Piping Diagrams) 1. Refrigerant Circuit (Piping Diagrams) Outdoor Unit No. in Electric piping Name Function symbol diagram Compressor 1 Compressor is operated in multi-steps according to Te or Tc by using inverter. Compressor 2 (Only for 96-240 class) Fan motor 1 The fan rotation speed is varied by using inverter.
  • Page 46 Refrigerant Circuit (Piping Diagrams) SiUS342303E No. in Electric piping Name Function symbol diagram Thermistor (Heat exchanger left deicer) Used to detect liquid pipe temperature of air heat exchanger. Used (34) R10T (Only for 192-240 class) to make judgements on defrost operation. Thermistor (Heat exchanger right gas This detects temperature of gas pipe for air heat exchanger.
  • Page 47 SiUS342303E Refrigerant Circuit (Piping Diagrams) RXYQ72AATJA, RXYQ72AAYDA Part 2 Refrigerant Circuit...
  • Page 48 Refrigerant Circuit (Piping Diagrams) SiUS342303E RXYQ96/120/144/168AATJA, RXYQ96/120/144/168AAYDA Part 2 Refrigerant Circuit...
  • Page 49 SiUS342303E Refrigerant Circuit (Piping Diagrams) RXYQ192/216/240AATJA, RXYQ192/216/240AAYDA Part 2 Refrigerant Circuit...

  • Page 50: Indoor Unit

    Refrigerant Circuit (Piping Diagrams) SiUS342303E 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 51 SiUS342303E Refrigerant Circuit (Piping Diagrams)  FXSQ-TB, FXMQ-TB  FXDQ-M Gas piping connection port Liquid piping connection port Filter Filter C: 4D141716 Indoor heat exchanger C: 4D043864N  FXMQ-PB  FXTQ-TA Gas piping connection port Indoor heat exchanger Liquid piping connection port Filter Filter C: 4D034245S C: 4D068194  CXTQ-TA...

  • Page 52: Indoor Low-Temperature Hydrobox

    Refrigerant Circuit (Piping Diagrams) SiUS342303E Indoor Low-Temperature Hydrobox HXY48TAVJU* No. in piping Name Symbol Function diagram Pump Circulates water to the local water piping and radiator. It operates at a maximum of 4,800 rpm. Flow switch Detects an abnormality in the water circuit. If the flow rate of water is below a certain value, an error will be issued.

  • Page 53: Outdoor-Air Processing Unit

    SiUS342303E Refrigerant Circuit (Piping Diagrams) Outdoor-Air Processing Unit FXMQ48/72/96MFVJU* Gas pipe connection port Heat exchanger Filter Capillary tube Distributor Solenoid valve Liquid pipe connection port Check valve Filter Filter Electronic expansion valve C: 4D018650D No. in piping Electric symbol Name Function diagram Electronic expansion valve...

  • Page 54: Functional Parts Layout

    Functional Parts Layout SiUS342303E 2. Functional Parts Layout RXYQ72AA Front View Fan motor (M1F) Thermistor (Electrical box air outlet) (R4T) Thermistor (M1C discharge pipe) Thermistor (Outdoor air) (R15T) (R1T) Solenoid valve (Four way valve) (Y5S) Bird’s Eye View Thermistor (Suction pipe before accumulator) Low pressure sensor (R5T) (S1NPL)
  • Page 55 SiUS342303E Functional Parts Layout Detail of A Electronic expansion valve Electronic expansion valve (Subcooling heat exchanger) (Refrigerant cooling air) (Y5E) (Y3E) Electronic expansion valve (Refrigerant cooling IPM) (Y2E) Thermistor (Subcooling gas pipe) (R6T) Thermistor (Subcooling liquid pipe) (R8T) C: 0P702581D Inside Electrical Component Box RXYQ72AATJA RXYQ72AAYDA...

  • Page 56: Rxyq96/120Aa

    Functional Parts Layout SiUS342303E RXYQ96/120AA Front View Fan motor 1 Fan motor 2 (M1F) (M2F) Thermistor (Electrical box air outlet) (R4T) Solenoid valve (Four way valve) (Y5S) High pressure sensor (S1NPH) Solenoid valve (Accumulator oil return) (Y4S) Bird’s Eye View Low pressure sensor (S1NPL) Thermistor...
  • Page 57 SiUS342303E Functional Parts Layout Detail of A Electronic expansion valve Electronic expansion valve (Subcooling heat exchanger) (Refrigerant cooling air) (Y5E) (Y3E) Electronic expansion valve (Refrigerant cooling IPM) (Y2E) Thermistor (Subcooling gas pipe) (R6T) Thermistor (Subcooling liquid pipe) (R8T) C: 0P702599D Inside Electrical Component Box RXYQ96/120AATJA RXYQ96/120AAYDA...

  • Page 58: Rxyq144/168Aa

    Functional Parts Layout SiUS342303E RXYQ144/168AA Front View Fan motor 1 Fan motor 2 (M1F) (M2F) Thermistor (Electrical box air outlet) (R4T) High pressure sensor (S1NPH) Solenoid valve (Accumulator oil return) (Y4S) Bird’s Eye View Thermistor (Suction pipe before accumulator) (R5T) Low pressure sensor (S1NPL) Solenoid valve...
  • Page 59 SiUS342303E Functional Parts Layout Detail of A Electronic expansion valve Electronic expansion valve (Subcooling heat exchanger) (Refrigerant cooling air) (Y5E) (Y3E) Electronic expansion valve (Refrigerant cooling IPM) (Y2E) Thermistor (Subcooling gas pipe) (R6T) Thermistor (Subcooling liquid pipe) (R8T) C: 0P702358C Inside Electrical Component Box RXYQ144/168AATJA RXYQ144/168AAYDA...

  • Page 60: Rxyq192/216/240Aa

    Functional Parts Layout SiUS342303E RXYQ192/216/240AA Front View Fan motor 1 Fan motor 2 (M1F) (M2F) Thermistor (Electrical box air outlet) (R4T) Solenoid valve (Oil separator oil return 1) (Y2S) Solenoid valve (Hot gas bypass) (Y3S) Thermistor (Heat exchanger liquid pipe) (R2T) Thermistor (Heat exchanger left deicer)
  • Page 61 SiUS342303E Functional Parts Layout Detail of A Electronic expansion valve Solenoid valve (Injection) (Refrigerant cooling air) (Y5E) (Y6S) Electronic expansion valve (Subcooling heat exchanger) (Y3E) Electronic expansion valve (Refrigerant cooling IPM) (Y2E) Thermistor (Subcooling injection) (R7T) Thermistor (Subcooling gas pipe) (R6T) Thermistor (Subcooling liquid pipe)

  • Page 62: Refrigerant Flow For Each Operation Mode

    Refrigerant Flow for Each Operation Mode SiUS342303E 3. Refrigerant Flow for Each Operation Mode RXYQ72AA Cooling Operation High temperature, high pressure, gas High temperature, high pressure, liquid Low temperature, low pressure Indoor unit operation Fan ON Fan OFF Fan ON Heat exchanger Heat exchanger Heat exchanger...
  • Page 63 SiUS342303E Refrigerant Flow for Each Operation Mode Cooling Oil Return Operation High temperature, high pressure, gas High temperature, high pressure, liquid Low temperature, low pressure Indoor unit operation Fan ON Fan OFF Fan ON Heat exchanger Heat exchanger Heat exchanger EV: Normal EV: Normal EV: 224 pulses...
  • Page 64 Refrigerant Flow for Each Operation Mode SiUS342303E Heating Oil Return & Defrost Operation High temperature, high pressure, gas High temperature, high pressure, liquid Low temperature, low pressure Indoor unit operation Fan OFF Fan OFF Fan OFF Heat exchanger Heat exchanger Heat exchanger EV: Normal EV: 224 pulses...
  • Page 65 SiUS342303E Refrigerant Flow for Each Operation Mode Heating Operation High temperature, high pressure, gas High temperature, high pressure, liquid Low temperature, low pressure Indoor unit operation Fan ON Fan OFF Fan LL Heat exchanger Heat exchanger Heat exchanger EV: Normal EV: 0 pulse EV: 0 pulse control...

  • Page 66: Rxyq96/120/144/168Aa

    Refrigerant Flow for Each Operation Mode SiUS342303E RXYQ96/120/144/168AA Cooling Operation High temperature, high pressure, gas High temperature, high pressure, liquid Low temperature, low pressure Indoor unit operation Fan ON Fan OFF Fan ON Heat exchanger Heat exchanger Heat exchanger EV: Normal EV: 0 pulse EV: 0 pulse control...
  • Page 67 SiUS342303E Refrigerant Flow for Each Operation Mode Cooling Oil Return Operation High temperature, high pressure, gas High temperature, high pressure, liquid Low temperature, low pressure Indoor unit operation Fan ON Fan OFF Fan ON Heat exchanger Heat exchanger Heat exchanger EV: Normal EV: Normal EV: 224 pulses...
  • Page 68 Refrigerant Flow for Each Operation Mode SiUS342303E Heating Oil Return & Defrost Operation High temperature, high pressure, gas High temperature, high pressure, liquid Low temperature, low pressure Indoor unit operation Fan OFF Fan OFF Fan OFF Heat exchanger Heat exchanger Heat exchanger EV: Normal EV: 224 pulses...
  • Page 69 SiUS342303E Refrigerant Flow for Each Operation Mode Heating Operation High temperature, high pressure, gas High temperature, high pressure, liquid Low temperature, low pressure Indoor unit operation Fan ON Fan OFF Fan LL Heat exchanger Heat exchanger Heat exchanger EV: Normal EV: 0 pulse EV: 0 pulse control...

  • Page 70: Rxyq192/216/240Aa

    Refrigerant Flow for Each Operation Mode SiUS342303E RXYQ192/216/240AA Cooling Operation High temperature, high pressure, gas High temperature, high pressure, liquid Low temperature, low pressure Indoor unit operation Fan ON Fan OFF Fan ON Heat exchanger Heat exchanger Heat exchanger EV: Normal EV: 0 pulse EV: 0 pulse control...
  • Page 71 SiUS342303E Refrigerant Flow for Each Operation Mode Cooling Oil Return Operation High temperature, high pressure, gas High temperature, high pressure, liquid Low temperature, low pressure Indoor unit operation Fan ON Fan OFF Fan ON Heat exchanger Heat exchanger Heat exchanger EV: Normal EV: Normal EV: 224 pulses...
  • Page 72 Refrigerant Flow for Each Operation Mode SiUS342303E Heating Oil Return & Defrost Operation High temperature, high pressure, gas High temperature, high pressure, liquid Low temperature, low pressure Indoor unit operation Fan OFF Fan OFF Fan OFF Heat exchanger Heat exchanger Heat exchanger EV: Normal EV: 224 pulses...
  • Page 73 SiUS342303E Refrigerant Flow for Each Operation Mode Heating Operation High temperature, high pressure, gas High temperature, high pressure, liquid Low temperature, low pressure Indoor unit operation Fan ON Fan OFF Fan LL Heat exchanger Heat exchanger Heat exchanger EV: Normal EV: 0 pulse EV: 0 pulse control...

  • Page 74: Part 3 Remote Controller

    SiUS342303E Part 3 Remote Controller 1. Applicable Models ..................68 2. Names and Functions ................69 2.1 BRC1E73 ....................69 2.2 BRC1H71W....................72 2.3 Wireless Remote Controller ............... 80 3. Main/Sub Setting..................81 3.1 BRC1E73 ....................81 3.2 BRC1H71W....................83 3.3 When Wireless Remote Controller is Used Together......... 85 4.

  • Page 75: Applicable Models

    SiUS342303E Applicable Models 1. Applicable Models Wired remote controller Series Wireless remote controller Navigation Madoka FXFQ-T — BRC082A42W (for BYFQ60C3W2W) FXZQ-TB BRC082A41W (for BYFQ60B3W1) FXUQ-PA — FXEQ-P FXDQ-M BRC4C82 FXSQ-TB BRC082A43 BRC4C82 (Fan: 2 steps) FXMQ-PB BRC082A43 (Fan: 3 steps) FXMQ-TB BRC082A43 BRC1E73...

  • Page 76: Names And Functions

    Names and Functions SiUS342303E 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 77 SiUS342303E 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 78 Names and Functions SiUS342303E 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 79: Brc1H71W

    SiUS342303E 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 80 Names and Functions SiUS342303E 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 81 SiUS342303E 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 82 Names and Functions SiUS342303E Setting list Installer User Administrator 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 83 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 84 Names and Functions SiUS342303E 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 85 SiUS342303E 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 86 * 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 87: Wireless Remote Controller

    SiUS342303E 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 88: Main/Sub Setting

    Main/Sub Setting SiUS342303E 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 89 SiUS342303E 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 90: Brc1H71W

    Main/Sub Setting SiUS342303E 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 91 SiUS342303E 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 92: When Wireless Remote Controller Is Used Together

    Main/Sub Setting SiUS342303E 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 93: Address Setting For Wireless Remote Controller

    SiUS342303E 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 94 Address Setting for Wireless Remote Controller SiUS342303E 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 95: Centralized Control Group No. Setting

    SiUS342303E 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 96 Centralized Control Group No. Setting SiUS342303E 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 97: Brc1H71W

    SiUS342303E 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 98: Group No. Setting Example

    Centralized Control Group No. Setting SiUS342303E 5. Press INSPECTION/TEST button and return to the normal mode. UP button Mode No. Field setting mode DOWN button RESERVE button MODE button Group No. INSPECTION/TEST button Group No. Setting Example Central Remote Controller Indoor/Outdoor Outdoor/Outdoor Indoor/Outdoor Outdoor/Outdoor F1 F2...

  • Page 99: Service Settings Menu, Maintenance Menu

    SiUS342303E 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 100 Service Settings Menu, Maintenance Menu SiUS342303E 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 101 SiUS342303E 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, depending Outdoor unit on the particular model.) Operation Hours...
  • Page 102 Service Settings Menu, Maintenance Menu SiUS342303E Maintenance Menu Item 2 Remarks Error Display Display error ON Displays the error on the screen. Display error OFF Displays neither errors nor warnings. Display warning ON Displays a warning on the screen if an error occurs. Display warning OFF No warning is displayed.

  • Page 103: Administrator Menu, Installer Menu

    SiUS342303E Administrator Menu, Installer Menu 7. Administrator Menu, Installer Menu BRC1H71W Refer to page 74 for details. Part 3 Remote Controller...

  • Page 104: Part 4 Functions And Control

    SiUS342303E Part 4 Functions and Control 1. Operation Flowchart..................99 2. Stop Control ....................100 2.1 Stop due to Error ..................100 2.2 When System is in Stop Control............... 100 2.3 Sub Unit Stops during Master Unit Control ..........100 3. Standby Control ..................101 3.1 Restart Standby..................
  • Page 105 SiUS342303E 9.8 List of Swing Flap Operations ..............137 9.9 Hot Start Control (In Heating Operation Only).......... 138 9.10 Louver Control for Preventing Ceiling Dirt..........139 9.11 Heater Control (Except FXTQ-TA Models)..........140 9.12 Heater Control (FXTQ-TA Models)............141 9.13 Gas Furnace Control (CXTQ-TA Models) ..........144 9.14 3-Step Thermostat Processing (FXTQ-TA Models) .........

  • Page 106: Operation Flowchart

    Operation Flowchart SiUS342303E 1. Operation Flowchart 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) Sub unit stops during master unit control Special control Standby control...

  • Page 107: Stop Control

    SiUS342303E Stop Control 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 234 of the troubleshooting for the items to determine the error.) When System is in Stop Control...

  • Page 108: Standby Control

    Standby Control SiUS342303E 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 migration of the refrigerant to the evaporator.

  • Page 109: Startup Control

    SiUS342303E Startup Control 4. Startup Control This control is used to equalize the pressure in the suction and discharge sides of the compressor prior to the startup of the compressor, thus reducing startup loads. Furthermore, the inverter is turned ON to charge the capacitor. To avoid stresses to the compressor due to liquid refrigerant return or else after the startup, the following control is made and the position of the four way valve is also determined.

  • Page 110: Basic Control

    Basic Control SiUS342303E 5. Basic Control Normal Control Function Part name Electric symbol Normal cooling Normal heating Compressor motor PI control, High pressure protection, Low PI control, High pressure protection, Low M1C, M2C pressure protection, Td protection, pressure protection, Td protection, Inverter protection Inverter protection Fan motor...

  • Page 111: Compressor Pi Control

    SiUS342303E Basic Control Compressor PI Control In order to provide a steady capacity, the compressor capacity is controlled to achieve temperature Te (or Tc) during cooling (or heating) operation. During cooling (or heating) operation The compressor capacity is controlled so Te (or Tc) approaches TeS (or TcS) (target value of temperature).

  • Page 112: Compressor Step Control

    Basic Control SiUS342303E Compressor Step Control The compressor operation varies in the following steps according to information in Compressor PI Control. Refer to page 104. Depending on the operating conditions of compressors, the compressors may run in patterns other than the following. RXYQ72AA Step Step...
  • Page 113 SiUS342303E Basic Control RXYQ96/120AA Step Step up (rps) Step down (rps) Step Step up (rps) Step down (rps) Step Step up (rps) Step down (rps) 15.0 15.0 22.5 25.1 22.5 25.1 63.9 71.3 63.9 71.3 15.3 15.3 22.8 25.5 22.8 25.5 64.8 72.3...
  • Page 114 Basic Control SiUS342303E RXYQ144/168AA Step Step up (rps) Step down (rps) Step Step up (rps) Step down (rps) Step Step up (rps) Step down (rps) 15.0 41.2 19.1 18.5 58.8 53.8 58.8 53.8 15.3 41.6 19.5 18.8 59.6 54.6 59.6 54.6 15.7 41.9...
  • Page 115 SiUS342303E Basic Control RXYQ192/216/240AA Step Step up (rps) Step down (rps) Step Step up (rps) Step down (rps) Step Step up (rps) Step down (rps) 15.0 15.0 43.0 19.0 24.0 58.5 63.6 58.5 63.6 15.2 15.2 43.6 19.2 24.4 59.4 64.4 59.4 64.4...

  • Page 116: Electronic Expansion Valve Pi Control

    Basic Control SiUS342303E Electronic Expansion Valve PI Control Main electronic expansion valve EVM control When the outdoor unit heat exchanging is performed via the condenser (Y5S is set to OFF), this function is used to exert PI control on the electronic expansion valve (Y1E or Y6E) so that the condenser outlet subcooling degree (SC) will become constant.

  • Page 117: Step Control Of Outdoor Fans

    SiUS342303E 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. RXYQ72AA RXYQ96/120AA RXYQ144/168AA Step Cooling Heating Cooling Heating Cooling Heating 1,025 1,025 1,072 1,072 1,177 1,027...

  • Page 118: Protection Control

    Protection Control SiUS342303E 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 119: Low Pressure Protection Control

    SiUS342303E Protection Control Low Pressure Protection Control This low pressure protection control is used to protect compressors against the transient decrease of low pressure. Cooling Because of common low pressure, the following control is performed in the system. Normal control Pe <...

  • Page 120: Inverter Protection Control

    Protection Control SiUS342303E Inverter Protection Control Inverter current protection control and radiation fin temperature control are performed to prevent tripping due to an abnormality, or transient inverter overcurrent, and fin temperature increase. In the case of multi-outdoor-unit system, each compressor performs these controls in the following sequence.
  • Page 121 SiUS342303E Protection Control Radiation Fin Perform the following control of integrated as well as multi units for each compressor. Temperature Normal operation Control Reduce compressor capacity When occurring 4 times within 60 Fin temperature standby minutes, the error code L4 is output. RXYQ96/120AATJA RXYQ144/168AATJA RXYQ192/216/240AATJA...

  • Page 122: Special Control

    Special Control SiUS342303E 7. Special Control Pump Down Residual Operation 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 123: Oil Return Operation

    SiUS342303E Special Control 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 R5T Ts: Suction pipe before accumulator temperature...
  • Page 124 Special Control SiUS342303E 7.2.2 Oil Return Operation in Heating Operation Electric Part name Function of functional part symbol Compressor motor RXYQ72AA: 127.3 rps RXYQ96/120AA: 125.4 rps + 140.0 rps M1C, M2C RXYQ144/168AA: 85.2 rps + 114.9 rps RXYQ192/216/240AA: 135.0 rps + 140.0 rps Fan motor With high pressure M1F, M2F...

  • Page 125: Defrost Operation

    SiUS342303E 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 Electric Part name Function of functional part symbol Compressor motor RXYQ72AA: 127.3 rps RXYQ96/120AA: 125.4 rps + 140.0 rps M1C, M2C RXYQ144/168AA: 85.2 rps + 114.9 rps...

  • Page 126: Outdoor Unit Rotation

    Special Control SiUS342303E 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 127: Other Control

    SiUS342303E Other Control 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 128: Outline Of Control (Indoor Unit)

    Outline of Control (Indoor Unit) SiUS342303E 9. Outline of Control (Indoor Unit) Regarding the outline of control for low-temperature hydrobox (HXY-TA), refer to the service manual SiUS392016EA. Operation Flowchart Cooling Operation Start (Option) Turn ON Aux. electric : OFF power supply ∗4 heater Humidifier...
  • Page 129 SiUS342303E 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 130 Outline of Control (Indoor Unit) SiUS342303E 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 Depends on the intensity progress? established? of gas combustion. (Option) Aux.
  • Page 131 SiUS342303E 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 132: Set Temperature And Control Target Temperature

    Outline of Control (Indoor Unit) SiUS342303E Set Temperature and Control Target Temperature 9.2.1 Without Infrared Floor Sensor The relationship between remote controller set temperature and control target temperature is described below.  When the suction air thermistor is used for controlling (Default), the control target temperature is determined as follows to prevent insufficient heating in heating operation.
  • Page 133 SiUS342303E Outline of Control (Indoor Unit) 9.2.2 With Infrared Floor Sensor The relationship between remote controller set temperature and control target temperature is described below.  The temperature difference for cooling  heating mode switching is 5°C (9°F).  When using the floor temperature as the control target, the remote controller set temperature is equal to the actual control target temperature in heating operation.

  • Page 134: Remote Controller Thermistor

    Outline of Control (Indoor Unit) SiUS342303E 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 135 SiUS342303E 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 136: Thermostat Control

    Outline of Control (Indoor Unit) SiUS342303E Thermostat Control The thermostat ON/OFF differential value (factory setting) differs depending on the models. Differential value Model 1°C (1.8°F) FXFQ-T, FXEQ-P, FXHQ-M, FXTQ-TA FXZQ-TB, FXUQ-PA, FXDQ-M, FXSQ-TB, FXMQ-PB, FXMQ-TB, FXMQ-M, 0.5°C (0.9°F) FXAQ-P, FXLQ-M, FXNQ-M, FXMQ-MF, CXTQ-TA 9.4.1 Without Infrared 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).
  • Page 137 SiUS342303E Outline of Control (Indoor Unit) 9.4.2 With Infrared Floor Sensor Whether the thermostat is turned on or off is determined by the difference between the remote controller set temperature and the detected temperature around people. Normal operation  Cooling operation ΔT ≤...
  • Page 138 Outline of Control (Indoor Unit) SiUS342303E 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 139: Drain Pump Control

    SiUS342303E 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 140 Outline of Control (Indoor Unit) SiUS342303E 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 141: Control Of Electronic Expansion Valve

    SiUS342303E 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 142: Freeze-Up Prevention Control

    Outline of Control (Indoor Unit) SiUS342303E 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 143 SiUS342303E Outline of Control (Indoor Unit) Note(s) When the indoor unit is FXFQ-T, FXZQ-TB, or FXUQ-PA, if the air outlet is set as dual-directional or tri-directional, the starting conditions will be changed as follows. Liquid pipe temperature ≤ 1°C (33.8°F) (for total of 15 minutes) Liquid pipe temperature ≤...

  • Page 144: List Of Swing Flap Operations

    Outline of Control (Indoor Unit) SiUS342303E List of Swing Flap Operations Swing flaps operate as shown in table below. Flap FXZQ-TB FXFQ-T FXEQ-P FXHQ-M FXUQ-PA FXAQ-P Hot start from defrost Swing Horizontal Horizontal Horizontal Horizontal operation Airflow direction set Horizontal Horizontal Horizontal Horizontal...

  • Page 145: Hot Start Control (In Heating Operation Only)

    SiUS342303E 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 146: Louver Control For Preventing Ceiling Dirt

    Outline of Control (Indoor Unit) SiUS342303E 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 147: Heater Control (Except Fxtq-Ta Models)

    SiUS342303E 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 148: Heater Control (Fxtq-Ta Models)

    Outline of Control (Indoor Unit) SiUS342303E 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 149 SiUS342303E 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 150 Outline of Control (Indoor Unit) SiUS342303E 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 151: Gas Furnace Control (Cxtq-Ta Models)

    SiUS342303E 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 152: 3-Step Thermostat Processing (Fxtq-Ta Models)

    Outline of Control (Indoor Unit) SiUS342303E 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 141.

  • Page 153: Fan Control (Heater Residual) (Fxtq-Ta Models)

    SiUS342303E 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 154 Outline of Control (Indoor Unit) SiUS342303E 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 155: Part 5 Field Settings And Test Operation

    SiUS342303E Part 5 Field Settings and Test Operation 1. Field Settings for Indoor Unit..............149 1.1 Field Settings with Remote Controller ............149 1.2 List of Field Settings for Indoor Unit ............155 1.3 Applicable Field Settings ................157 1.4 Details of Field Settings for Indoor Unit............ 161 1.5 Field Settings of Low-Temperature Hydrobox..........

  • Page 156: Field Settings For Indoor Unit

    Field Settings for Indoor Unit SiUS342303E 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 157 SiUS342303E 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 158 Field Settings for Indoor Unit SiUS342303E 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 159 SiUS342303E 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 160 Field Settings for Indoor Unit SiUS342303E 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 161 SiUS342303E 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 162: List Of Field Settings For Indoor Unit

    Field Settings for Indoor Unit SiUS342303E List of Field Settings for Indoor Unit : Factory setting First Second Code No. Mode Reference Code Setting Contents Page (Note 2) Filter Ultra long life Approx. Approx. cleaning filter 10,000 5,000 sign hrs. hrs.
  • Page 163 SiUS342303E Field Settings for Indoor Unit First Second Code No. Mode Reference Code Setting Contents Page (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 164: Applicable Field Settings

    Field Settings for Indoor Unit SiUS342303E Applicable Field Settings First Field Code Setting Modes setting Filter cleaning sign interval Filter sign setting — — — — — — — Filter type — — — Filter cleaning sign interval — — —...
  • Page 165 SiUS342303E Field Settings for Indoor Unit First Field Code Setting Modes setting Setting of airflow rate — — — Airflow direction setting — — — — Swing pattern settings — — — — Setting of airflow direction — — — 13 (23) adjustment range Setting of static pressure...
  • Page 166 Field Settings for Indoor Unit SiUS342303E First Field Code Setting Modes setting Filter cleaning sign interval — — Filter sign setting — — — — — — Filter type — — — — — — Filter cleaning sign interval — —...
  • Page 167 SiUS342303E Field Settings for Indoor Unit First Field Code Setting Modes setting Drain pump operation — — — — — — — — settings Humidification when heating thermostat is OFF Setting of direct duct — — — — — — —...

  • Page 168: Details Of Field Settings For Indoor Unit

    Field Settings for Indoor Unit SiUS342303E 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 169 SiUS342303E Field Settings for Indoor Unit (˚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 170 Field Settings for Indoor Unit SiUS342303E : Factory setting Mode First Code Second Code Contents Remote controller thermistor control is not permitted during 01 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 171 SiUS342303E Field Settings for Indoor Unit 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 172 Field Settings for Indoor Unit SiUS342303E 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 173 SiUS342303E Field Settings for Indoor Unit 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 174 Field Settings for Indoor Unit SiUS342303E 1.4.10 Detection Rate Setting (For units with an infrared presence sensor only) Set the sensitivity of the infrared presence sensor.  The infrared presence sensor can be disabled by selecting the Second code No. 04. Note(s) When the infrared presence 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 in...
  • Page 175 SiUS342303E Field Settings for Indoor Unit 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 floor sensor only) Change the ratio between the suction air temperature and floor temperature used to calculate the temperature around human.
  • Page 176 Field Settings for Indoor Unit SiUS342303E 1.4.14 Dry Mode Set Temperature (for FXZQ-TB, FXUQ-PA, FXSQ-TB, and FXMQ-TB models) : Factory setting Mode No. First Code No. Second Code No. Contents 01 Room temperature 11 (21) Same as cooling mode set temperature 1.4.15 Optional Output Switching Using this setting, "operation output signal"...
  • Page 177 SiUS342303E Field Settings for Indoor Unit 1.4.17 Thermostat Switching Differential value during thermostat ON/OFF control can be changed. Mode No. First Code No. Second Code No. Contents 1°C (1.8°F) 12 (22) 0.5°C (0.9°F) Factory Setting Model Second Code No. Contents FXFQ-T, FXEQ-P, FXHQ-M, FXTQ-TA 1°C (1.8°F) FXZQ-TB, FXUQ-PA, FXDQ-M, FXSQ-TB, FXMQ-PB,...
  • Page 178 Field Settings for Indoor Unit SiUS342303E Due to the aforementioned, when the "Auto restart after power failure” setting is ON, be careful for the following situations that may occur. 1. The air conditioner will start operation suddenly after power failure, Caution or when the main power supply is restored.
  • Page 179 SiUS342303E Field Settings for Indoor Unit FXZQ-TB, FXEQ-P : Factory setting Mode First Code Second Contents Ceiling height Code No. 01 Standard Lower than 2.7 m (8-3/4 ft) 13 (23) High Ceiling 1 Lower than 3.0 m (10 ft) Higher Ceiling 2 Lower than 3.5 m (11-1/2 ft) FXHQ-M, FXAQ-P : Factory setting...
  • Page 180 Field Settings for Indoor Unit SiUS342303E 1.4.26 Setting of Static Pressure Selection (for FXDQ-M models) : Factory setting Mode No. First Code No. Second Code No. Contents Standard (FXDQ07-12M: 10 Pa (0.04 inWG), 01 FXDQ18/24M: 30 Pa (0.12 inWG)) 13 (23) High static pressure (FXDQ07-12M: 15 Pa (0.06 inWG), FXDQ18/24M: 45 Pa (0.18 inWG)) 1.4.27 External Static Pressure Settings...
  • Page 181 SiUS342303E Field Settings for Indoor Unit FXMQ-TB models : Factory setting Mode No. First Code No. Second Code No. Contents 50 Pa (0.20 inWG) 60 Pa (0.24 inWG) 70 Pa (0.28 inWG) 80 Pa (0.32 inWG) 90 Pa (0.36 inWG) 07...
  • Page 182 Field Settings for Indoor Unit SiUS342303E 1.4.30 Mold Proof Operation Setting (for FXEQ-P models) : Factory setting Mode First Code Second Code Contents — 14 (24) 02 Standard For high humidity areas () Areas with average humidity over 80%. 1.4.31 Gas Furnace Test Mode (for CXTQ-TA models) This setting is used for gas furnace test run.
  • Page 183 SiUS342303E Field Settings for Indoor Unit 1.4.35 Interlocked Operation between Humidifier and Drain Pump This is used to interlock the humidifier with the drain pump. When water is drained out of the unit, this setting is unnecessary. : Factory setting Mode First Code Second Code...
  • Page 184 Field Settings for Indoor Unit SiUS342303E 1.4.40 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 185: Field Settings Of Low-Temperature Hydrobox

    SiUS342303E Field Settings for Indoor Unit 1.4.42 Setback Availability For BRC1E73 only Select the operation mode in which the setback function is available. : Factory setting Mode First Code Second Code Contents 01 N/A Heat only Cool only Cool/heat 1.4.43 Setting "Restricted/Permitted" for Airflow Block For units with the infrared presence/floor sensor only The airflow block function cannot be enabled when closure material kit, fresh air intake kit, separately installed natural evaporation type humidifier, or branch air duct is equipped, due to the...

  • Page 186: Gas Furnace Set Up

    Field Settings for Indoor Unit SiUS342303E 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 187: List Of Field Settings For Outdoor-Air Processing Unit

    SiUS342303E Field Settings for Indoor Unit Dip switch — — B — — ON OFF Heating Speed Tap — — — — 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 188 Field Settings for Indoor Unit SiUS342303E How to Select Operation Mode Whether operation by remote controller will be possible or not for turning ON/OFF, controlling temperature or setting operation mode is selected and decided by the operation mode given on the right edge of the table below.

  • Page 189: Field Setting From Outdoor Unit

    SiUS342303E Field Setting from Outdoor Unit 2. Field Setting from Outdoor Unit To continue the configuration of the VRV 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 190 Field Setting from Outdoor Unit SiUS342303E (1) Microcomputer normal monitor This monitor blinks while in normal control, and turns ON or OFF when an error occurs. (2) Segment display Used to check the transmission and display the transmission state between indoor and outdoor units, the contents of error, and the contents of field setting.

  • Page 191: Accessing The Bs Buttons On The Pcb

    SiUS342303E 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 PCB and read out the seven-segment display(s). 1. Open the service window cover. 2.

  • Page 192: Operating The Bs Buttons And Dip Switches On The Pcb

    Field Setting from Outdoor Unit SiUS342303E Operating the BS Buttons and DIP Switches on the PCB Operating the BS By operating the BS buttons it is possible to: buttons  Perform special actions (test operation, etc.).  Perform field settings (demand operation, low noise, etc.). Below procedure explains how to operate the BS buttons to reach the required mode in the menu, select the correct setting and modify the value of the setting.
  • Page 193 SiUS342303E 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 194 Field Setting from Outdoor Unit SiUS342303E 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 195: Monitoring Function And Field Settings

    SiUS342303E Field Setting from Outdoor Unit 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. Below relevant Monitoring mode (mode 1) and Field setting mode (mode 2) settings are explained in detail.
  • Page 196 Field Setting from Outdoor Unit SiUS342303E [1-9]: shows the AIRNET address. [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. In case there is a mismatch, it is advised to check the communication wiring path between outdoor and indoor units (F1/F2 communication line).
  • Page 197 SiUS342303E Field Setting from Outdoor Unit 2.4.2 Overview of Setting Mode (Mode 2) This overview shows the available settings by using the press buttons on the outdoor unit PCB. 7 segment 7 segment display display Item Description Description Range 1 COOL/HEAT Several systems as 1 zone change Individual...
  • Page 198 Field Setting from Outdoor Unit SiUS342303E 7 segment 7 segment display display Item Description Description Range 1 External low Low noise level when the external Level 1 noise level low noise signal is input at option Level 2 DTA104A62. Level 3 Automatic night- Time to start automatic “night-time About 8:00 PM...
  • Page 199 SiUS342303E Field Setting from Outdoor Unit 7 segment 7 segment display display Item Description Description Range 1 Heat pump Heat pump would be resumed 2.8°C (5°F) lockout release when the outdoor air temperature 5.6°C (10°F) differential is recovered by differential above 8.3°C (15°F) the heat pump lockout temperature.
  • Page 200 Field Setting from Outdoor Unit SiUS342303E 7 segment 7 segment display display Item Description Description Range 1 VRTsmart Used to change lower limit of target control condensation temperature in Standard Tc lower limit VRTsmart control. High 1 High 2 High 3 High 4 High 5 High 6...
  • Page 201 SiUS342303E Field Setting from Outdoor Unit 2.4.3 Details of Setting Mode 2 Mode 2 is used to change the field settings of the system. Consulting the current field setting value and changing the current field setting value is possible. In general, normal operation can be resumed without special intervention after changing field settings.
  • Page 202 [2-4] 0 (default) OFF (Normal installation) ON (Single module to dual module installation) Conditions/rules apply for this setting. Refer to selection software or contact your Daikin sales representative for further details. [2-5]: Cross wiring check by indoor fan forced H Default value: 0.
  • Page 203 SiUS342303E Field Setting from Outdoor Unit Change [2-8] to 0, 2-7 in function of required operation method during cooling. For more information and advice about the effect of these settings, refer to Energy Saving and Optimum Operation on page 215. [2-9]: Tc target temperature during heating operation Default value: 6...
  • Page 204 Field Setting from Outdoor Unit SiUS342303E [2-20]: Additional refrigerant charge In order to add the additional refrigerant charge amount following setting should be applied. Default value: 0 To activate additional refrigerant charge 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 205 SiUS342303E Field Setting from Outdoor Unit [2-25]: Night-time low noise operation level via the external control adaptor If the system needs to run under night-time low noise operation conditions when an external signal is sent to the unit, this setting defines the level of night-time low noise that will be applied (3: Level 3 <...
  • Page 206 Field Setting from Outdoor Unit SiUS342303E [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 207 SiUS342303E Field Setting from Outdoor Unit Next time graph shows the different steps during the power transistor check mode.  Switching sequence during power transistor check mode: Power transistor check mode RXYQ-AA Disconnect fasten U/V/W from compressor! Voltage Check 4 Step 1: Step 2: Magnet...
  • Page 208 Field Setting from Outdoor Unit SiUS342303E [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 209 SiUS342303E Field Setting from Outdoor Unit [2-31]: Power consumption limitation level (step 2) via the external control adaptor (DTA104A62) 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 210 Field Setting from Outdoor Unit SiUS342303E [2-39]: Emergency operation “Sub” To disable compressor operation of “Sub” unit of a multi outdoor system permanently: Default value: 0. Compressor operation enabled. Field setting:  Set 1: Sub INV. 1 is disabled permanently. ...
  • Page 211 SiUS342303E Field Setting from Outdoor Unit [2-81]: Cooling comfort setting Default value: 1 Value Cooling comfort setting [2-81] 1 (default) Mild Quick Powerful Change [2-81] to 0, 1, 2 or 3 in function of required limitation. This setting is used in conjunction with setting [2-8]. For more information and advice about the effect of these settings, refer to Energy Saving and Optimum Operation on page 215.
  • Page 212 Field Setting from Outdoor Unit SiUS342303E [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 213 SiUS342303E Field Setting from Outdoor Unit 2.4.4 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 temperature heater can be energized based on the (18.3°C) 0°F 5°F...
  • Page 214 Field Setting from Outdoor Unit SiUS342303E 2.4.5 Heat Pump Lockout 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 215 SiUS342303E Field Setting from Outdoor Unit [2-47]: 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 216 Field Setting from Outdoor Unit SiUS342303E [2-65]: 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.

  • Page 217: Night-Time Low Noise Operation And Demand Operation

    SiUS342303E Field Setting from Outdoor Unit Night-Time Low Noise Operation and Demand Operation 2.5.1 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 218 Field Setting from Outdoor Unit SiUS342303E Image of operation in the case of A Operation sound Rated Operation sound during low noise mode can be set with Low noise mode instructing External low noise Level 1 Approx. 55 dB (target) level setting (Factory setting is level 2.) Level 2...
  • Page 219 SiUS342303E Field Setting from Outdoor Unit 2.5.2 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 Setting...
  • Page 220 Field Setting from Outdoor Unit SiUS342303E Image of operation in the case of A Power consumption Rated The power Demand level 1 Demand level 2 Demand level 3 consumption instructing instructing instructing during the demand level 1 instructing can be set with the Power consumption set by Demand 1 level...
  • Page 221 SiUS342303E Field Setting from Outdoor Unit 2.5.3 Setting Procedure of Night-Time Low Noise Operation and Demand Operation 1. Setting mode 1 (H1P OFF) In setting mode 2, press the MODE (BS1) button once  Setting mode 1 is entered and H1P turns OFF.

  • Page 222: Energy Saving And Optimum Operation

    Field Setting from Outdoor Unit SiUS342303E Energy Saving and Optimum Operation This VRV system is equipped with advanced energy saving functionality (VRT). Detecting all connected indoor unit type, advanced energy saving functionality type is selected automatically. Depending on the priority, emphasizes can be put on energy saving or comfort level. Several parameters can be selected, resulting in the optimal balance between energy consumption and comfort for the particular application.
  • Page 223 SiUS342303E Field Setting from Outdoor Unit  To activate this setting under heating operation: change field setting [2-9] to the appropriate value, matching the requirements of the pre-designed system containing a high sensible solution. Value Tc target [2-9] 106°F (41°C) 109°F (43°C) 115°F (46°C) 2.6.2 Comfort Settings...
  • Page 224 Field Setting from Outdoor Unit SiUS342303E  To activate the mild comfort setting under heating operation, change field setting [2-82] to 1. • Eco The original refrigerant temperature target, which is defined by the operation method (see above) is kept without any correction, unless for protection control. ...

  • Page 225: Test Operation

    SiUS342303E Test Operation 3. Test Operation After installation and once the field settings are defined, the installer is obliged to verify correct operation. Therefore a test operation must be performed according to the procedures described below. Precautions Before Starting Test Operation After the installation of the unit, first check the following items.
  • Page 226 Test Operation SiUS342303E During test operation, the outdoor units and the indoor units will start up: Make sure that the preparations of all indoor units are finished (field piping, electrical wiring, air purge, etc.). See installation manual of the indoor units for details. Caution Do not insert fingers, rods or other objects into the air inlet or outlet.

  • Page 227: Test Operation Procedure

    SiUS342303E Test Operation Test Operation Procedure The procedure below describes the test operation of the complete system. This operation checks and judges following items:  Check of wrong wiring (communication check with indoor units).  Check of the stop valves opening. ...

  • Page 228: Correcting After Abnormal Completion

    Test Operation SiUS342303E 5. Check the test operation results on the outdoor unit 7-segment display. Normal completion: no indication on the 7-segment display (idle) Abnormal completion: indication of error code on the 7-segment display Take actions for correcting the abnormality. When the test operation is fully completed, normal operation will be possible after 5 minutes.

  • Page 229: Gas Furnace Test Operation

    SiUS342303E 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 230: Part 6 Service Diagnosis

    SiUS342303E Part 6 Service Diagnosis 1. Symptom-based Troubleshooting ............226 1.1 General Troubleshooting................226 1.2 Low-Temperature Hydrobox Overall ............229 1.3 With Gas Furnace ..................229 1.4 Gas Furnace Lockout Reset..............229 1.5 With Infrared Presence/Floor Sensor ............230 2. Troubleshooting with Remote Controller..........231 2.1 BRC1E73 ....................
  • Page 231 SiUS342303E 3.28 Remote Sensor Abnormality ..............291 3.29 Humidity Sensor System Abnormality ............292 3.30 Infrared Presence/Floor Sensor Error ............293 3.31 Remote Controller Thermistor Abnormality ..........298 3.32 Outdoor Unit Main/Sub PCB Abnormality ..........299 3.33 Detection of Ground Leakage by Leak Detection Circuit ......300 3.34 Missing of Ground Leakage Detection Core ..........
  • Page 232 SiUS342303E 3.72 System Not Set Yet .................. 366 3.73 System Abnormality, Refrigerant System Address Undefined ....367 3.74 Climate Talk Communication System Combination Error (Before Initial Setting for Communication Completes)............ 369 3.75 Climate Talk Communication System Combination Error (After Initial Setting for Communication Completes)............

  • Page 233: Symptom-Based Troubleshooting

    SiUS342303E Symptom-based Troubleshooting 1. Symptom-based Troubleshooting General Troubleshooting 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 234 Symptom-based Troubleshooting SiUS342303E Symptom Supposed Cause Countermeasure COOL/HEAT The remote controller displays This remote controller has no option Use a remote controller with option to selection is CENTRAL CONTROL. to select cooling operation. select cooling operation. disabled. The remote controller displays COOL/HEAT selection is made using Use the COOL/HEAT selection CENTRAL CONTROL, and the...
  • Page 235 SiUS342303E Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure The system Indoor unit These are operating sounds of the Normal operation. produces sounds. Immediately after turning ON electronic expansion valve of the This sound becomes low after a the power supply, indoor unit indoor unit.

  • Page 236: Low-Temperature Hydrobox Overall

    Symptom-based Troubleshooting SiUS342303E Low-Temperature Hydrobox Overall Regarding the symptom-based troubleshooting of the low-temperature hydrobox (HXY-TA), refer to the service manual SiUS392016EA. 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.

  • Page 237: With Infrared Presence/Floor Sensor

    SiUS342303E Symptom-based Troubleshooting With Infrared Presence/Floor Sensor Condition Measure "Louver operation different from setting" or "No downward Refer to the flowchart below. airflow in heating operation" Individual airflow direction setting different from the actual · Check the "Louver operation different from setting" error airflow direction diagnosis.

  • Page 238: Troubleshooting With Remote Controller

    Troubleshooting with Remote Controller SiUS342303E 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 239: Brc1H71W

    SiUS342303E 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 240 Troubleshooting with Remote Controller SiUS342303E  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 241: Troubleshooting By Error Code

    SiUS342303E Troubleshooting by Error Code 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 242 Troubleshooting by Error Code SiUS342303E Error Operation Reference Error contents code lamp page Discharge pipe thermistor abnormality Compressor body thermistor abnormality Suction pipe before accumulator thermistor abnormality Heat exchanger deicer thermistor abnormality Heat exchanger gas pipe thermistor abnormality Subcooling liquid pipe thermistor abnormality Subcooling injection thermistor abnormality Heat exchanger liquid pipe thermistor abnormality Subcooling gas pipe thermistor abnormality...

  • Page 243: Error Codes (Sub Codes)

    SiUS342303E Troubleshooting by Error Code Error Codes (Sub Codes) If an error code like the one shown below is displayed when a wired remote controller is in use, make a detailed diagnosis or a diagnosis of the relevant unit. 3.2.1 Indoor Unit Troubleshooting Error code Error Description...
  • Page 244 Troubleshooting by Error Code SiUS342303E Troubleshooting Error code Error Description Diagnosis Indoor blower does not have required parameters to Refer to page 290. 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 245 SiUS342303E 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 E7 - 05 Fan motor M1F momentary overcurrent (Master)
  • Page 246 Troubleshooting by Error Code SiUS342303E Troubleshooting Error code Error Description Diagnosis F6 - 02 Refrigerant overcharged Refrigerant overcharge was detected during test operation. H1 - 01 Defective box air thermistor (R17T) (Master) Refer to the H1 flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left.
  • Page 247 SiUS342303E Troubleshooting by Error Code Troubleshooting Error code Error Description Diagnosis J6 - 01 Defective heat exchanger deicer thermistor (R3T) (Master) Refer to the J6 flowchart and make a diagnosis of the relevant thermistor of the relevant unit based on the Error J6 - 02 Defective heat exchanger deicer thermistor (R3T) (Sub) code shown to the left.
  • Page 248 Troubleshooting by Error Code SiUS342303E 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 249 SiUS342303E Troubleshooting by Error Code 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 (Sub) L8 - 11...
  • Page 250 Troubleshooting by Error Code SiUS342303E Troubleshooting Error code Error Description Diagnosis U1 - 01 Reverse phase/open phase of power supply (Master) Refer to the U1 flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left. Reverse phase/open phase of power supply U1 - 04 (when power ON) (Master)
  • Page 251 SiUS342303E Troubleshooting by Error Code Troubleshooting Error code Error Description Diagnosis UA - 17 Connection of excessive indoor units Refer to the UA flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left. UA - 18 Connection of wrong models of indoor units UA - 20...

  • Page 252: Prediction Codes

    Troubleshooting by Error Code SiUS342303E Prediction Codes Prediction Code List Seven-segment display Description Possible cause Tech tips Compressor overcurrent prediction Error code L5, L8 Refer to L5, L8 troubleshooting 10A-## _ _ 1 0 0 1 - # # — Same as L8 EVM1 refrigerant leakage prediction ■...
  • Page 253 SiUS342303E Troubleshooting by Error Code Seven-segment display Description Possible cause Tech tips Indoor unit thermistor failure ■ Th1 sensor failure Th1: Refer to C9 troubleshooting. 31B-## _ _ 3 1 0 2 # # # _ _ # prediction (Th2) ■...
  • Page 254 Troubleshooting by Error Code SiUS342303E Prediction Code Detail Information – Sub code ■ In case is not “3”, Tens digit – 0: System, 1: Main, 2: Sub Ones digit – 0: Others, 1: Compressor 1, 2: Compressor 2 ■ In case is “3”, Under AirNet system, “##”...
  • Page 255 SiUS342303E Troubleshooting by Error Code Prediction Code Detail Information by Seven-segment Display in Monitor Mode Push BS2 Push BS2 Push BS2 Prediction code Product type digit Prediction sub code AirNet address display flag Type of Detail of error error SEG1 SEG2 SEG3 SEG1...

  • Page 256: External Protection Device Abnormality

    Troubleshooting by Error Code SiUS342303E External Protection Device Abnormality 3.4.1 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 257 SiUS342303E Troubleshooting by Error Code 3.4.2 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 258: Indoor Unit Control Pcb Abnormality

    Troubleshooting by Error Code SiUS342303E 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 259: Drain Level Control System Abnormality

    SiUS342303E Troubleshooting by Error Code Drain Level Control System Abnormality Applicable FXFQ-T, FXZQ-TB, FXUQ-PA, FXEQ-P, FXDQ-M, FXSQ-TB, FXMQ-PB, FXMQ-TB 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 260 Troubleshooting by Error Code SiUS342303E 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 261: Indoor Fan Motor Lock, Overload

    SiUS342303E Troubleshooting by Error Code Indoor Fan Motor Lock, Overload Applicable FXFQ-T, FXZQ-TB, FXUQ-PA, FXEQ-P, FXSQ05-48TB, FXMQ07-12PB, FXMQ15-24TB, 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 262 Troubleshooting by Error Code SiUS342303E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn OFF the power supply, and then wait for a period of 10 minutes. Are there any foreign Remove the foreign matter.

  • Page 263: Indoor Fan Motor Abnormality

    SiUS342303E Troubleshooting by Error Code Indoor Fan Motor Abnormality 3.8.1 Indoor Fan Motor Abnormality (FXDQ-M, FXHQ-M Models) Applicable FXDQ-M, FXHQ-M Models Error Code Method of Error This error is detected if there is no revolution detection signal output from the fan motor. Detection Error Decision When no revolutions can be detected even at the maximum output voltage to the fan...
  • Page 264 Troubleshooting by Error Code SiUS342303E 3.8.2 Indoor Fan Motor Abnormality (FXSQ54TB, FXMQ15-54PB, FXMQ30-54TB Models) Applicable FXSQ54TB, FXMQ15-54PB, FXMQ30-54TB Models Error Code Method of Error  Error from the current flow on the fan PCB  Error from the rotation speed of the fan motor in operation Detection ...
  • Page 265 SiUS342303E Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn OFF the power and wait for 10 minutes. There is a foreign matter around Remove the foreign matter.
  • Page 266 Troubleshooting by Error Code SiUS342303E 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 267: Overload/Overcurrent/Lock Of Indoor Fan Motor

    SiUS342303E Troubleshooting by Error Code Overload/Overcurrent/Lock of Indoor Fan Motor Applicable FXMQ-M Models Error Code Outline This error is detected by detecting that the individual power supply for the fan turns OFF. Error Decision When it is not detected that the individual power supply for the indoor fan turns ON while in Conditions operation.

  • Page 268: Blower Motor Not Running

    Troubleshooting by Error Code SiUS342303E 3.10 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 269: Indoor Fan Motor Status Abnormality

    SiUS342303E Troubleshooting by Error Code 3.11 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 270: Low Indoor Airflow

    Troubleshooting by Error Code SiUS342303E 3.12 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 271: Swing Flap Motor Abnormality

    SiUS342303E Troubleshooting by Error Code 3.13 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 272 Troubleshooting by Error Code SiUS342303E 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 273: Power Supply Voltage Abnormality

    SiUS342303E Troubleshooting by Error Code 3.14 Power Supply Voltage Abnormality Applicable FXSQ-TB, FXMQ-PB, FXMQ-TB Models Error Code Method of Error Error is detected by checking the input voltage of the fan motor. Detection Error Decision When the input voltage of fan motor is 150 V or less, or 386 V or more. Conditions Supposed ...

  • Page 274: Blower Motor Stops For Over/Under Voltage

    Troubleshooting by Error Code SiUS342303E 3.15 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 275: Electronic Expansion Valve Coil Abnormality, Dust Clogging

    SiUS342303E Troubleshooting by Error Code 3.16 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 276: Gas Furnace Abnormality

    Troubleshooting by Error Code SiUS342303E 3.17 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 277: Drain Level Above Limit

    SiUS342303E Troubleshooting by Error Code 3.18 Drain Level above Limit Applicable FXFQ-T, FXZQ-TB, FXUQ-PA, FXEQ-P, FXDQ-M, FXSQ-TB, FXMQ-PB, FXMQ-TB 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 278: Self-Cleaning Decoration Panel Abnormality

    Troubleshooting by Error Code SiUS342303E 3.19 Self-Cleaning Decoration Panel Abnormality Applicable FXFQ-T (when self-cleaning decoration panel BYCQ125BGW1 is installed) Models Error Code Method of Error Error is detected by abnormal signal from the self-cleaning decoration panel. Detection Error Decision Any of the following conditions is met while the unit is in operation. Conditions ...
  • Page 279 SiUS342303E 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 transmission between self-cleaning decoration panel Go to Diagnosis Flowchart-1. and indoor unit (Transmission error between normal? self-cleaning decoration panel and indoor unit)
  • Page 280 Troubleshooting by Error Code SiUS342303E Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-1 AH-03 Transmission error between self-cleaning decoration panel and indoor unit Is the connector ( 1) on the indoor unit control Properly connect the PCB properly connected? connector.
  • Page 281 SiUS342303E Troubleshooting by Error Code Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-2 AH-04 Dust detection sensor error Is the connector X12A on the self-cleaning decoration panel PCB Properly connect the properly connected? connector.
  • Page 282 Troubleshooting by Error Code SiUS342303E Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-3 AH-05 Dust collection sign Is the inside of dust collection port clogged Clean the dust from the inside by dust? of dust collection port.
  • Page 283 SiUS342303E Troubleshooting by Error Code Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-4 AH-06 Air filter rotation error Is the filter Properly attached the filter. properly attached? Is there any foreign matter in the filter Remove the foreign matter.
  • Page 284 Troubleshooting by Error Code SiUS342303E From the previous page Start operation with remote controller. Error AH recurs, Normal. or the self-cleaning decoration panel lamp (red) blinks? The error could be caused by other causes. Refer to other diagnosis flowcharts in the following order: AH-05→03→04→07→08→09.
  • Page 285 SiUS342303E Troubleshooting by Error Code Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-5 AH-07 Damper rotation error Is the damper Properly attached the damper. properly attached? Is there any foreign matter in the damper Remove the foreign matter.
  • Page 286 Troubleshooting by Error Code SiUS342303E From the previous page Start operation with remote controller. Error AH recurs, Normal. or the self-cleaning decoration panel lamp (red) blinks? The error could be caused by other causes. Refer to other diagnosis flowcharts in the following order: AH-05→03→04→06→08→09.
  • Page 287 SiUS342303E Troubleshooting by Error Code Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-6 AH-08 Filter auto clean operation error Is there any external factor other than the Remove the external factor.
  • Page 288 Troubleshooting by Error Code SiUS342303E Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Diagnosis Flowchart-7 AH-09 Filter auto clean operation start disabled error Has any air conditioning operation been Stop the air conditioning running continuously for operation and perform filter...

  • Page 289: Capacity Determination Device Abnormality

    SiUS342303E Troubleshooting by Error Code 3.20 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 290: Transmission Abnormality Between Indoor Unit Control Pcb And Fan Pcb

    Troubleshooting by Error Code SiUS342303E 3.21 Transmission Abnormality between Indoor Unit Control PCB and Fan PCB Applicable FXSQ-TB, FXMQ-PB, FXMQ-TB 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 291 SiUS342303E 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 292: Blower Motor Communication Error

    Troubleshooting by Error Code SiUS342303E 3.22 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 293: Climate Talk Communication Error

    SiUS342303E Troubleshooting by Error Code 3.23 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 294: Thermistor Abnormality

    Troubleshooting by Error Code SiUS342303E 3.24 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 295: Combination Error Between Indoor Unit Control Pcb And Fan Pcb

    SiUS342303E Troubleshooting by Error Code 3.25 Combination Error between Indoor Unit Control PCB and Fan PCB Applicable FXSQ-TB, FXMQ-PB, FXMQ-TB 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 296: Blower Motor Hp Mismatch

    Troubleshooting by Error Code SiUS342303E 3.26 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 297: Indoor Blower Does Not Have Required Parameters To Function

    SiUS342303E Troubleshooting by Error Code 3.27 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 298: Remote Sensor Abnormality

    Troubleshooting by Error Code SiUS342303E 3.28 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 299: Humidity Sensor System Abnormality

    SiUS342303E Troubleshooting by Error Code 3.29 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 300: Infrared Presence/Floor Sensor Error

    Troubleshooting by Error Code SiUS342303E 3.30 Infrared Presence/Floor Sensor Error Applicable FXFQ-T, FXZQ-TB, FXUQ-PA Models Error Code Method of Error The contents of a failure vary with the detailed error code. Check the code and proceed with the Detection flowchart. Error Decision Error is detected based on sensor output signals Conditions...
  • Page 301 SiUS342303E 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 and the connector ( 1) normal? Is the connection of the Connect the connector correctly.
  • Page 302 Troubleshooting by Error Code SiUS342303E Diagnosis procedure 2 Infrared floor sensor error (Error code CE-02) Is the connection of the connector on infrared floor Connect the connector correctly. sensor PCB and the connector ( 1) normal? Is the connection of the Connect the connector correctly.
  • Page 303 SiUS342303E Troubleshooting by Error Code Diagnosis procedure 3 Infrared floor sensor error (Error code CE-03) Is the connection of the connector on infrared floor Connect the connector correctly. sensor PCB and the connector (1) normal? Is the connection of the Connect the connector correctly.
  • Page 304 Troubleshooting by Error Code SiUS342303E Diagnosis procedure 4 Infrared floor sensor error (Error code CE-04) Is the connection of the connector on infrared floor Connect the connector correctly. sensor PCB and the connector ( 1) normal? Is the connection of the Connect the connector correctly.

  • Page 305: Remote Controller Thermistor Abnormality

    SiUS342303E Troubleshooting by Error Code 3.31 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 306: Outdoor Unit Main/Sub Pcb Abnormality

    Troubleshooting by Error Code SiUS342303E 3.32 Outdoor Unit Main/Sub 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 307: Detection Of Ground Leakage By Leak Detection Circuit

    SiUS342303E Troubleshooting by Error Code 3.33 Detection of Ground Leakage by Leak Detection Circuit Applicable All outdoor unit models Models Error Code Sub code: 01, 02 Method of Error Detect leakage current in the ground leakage detection circuit and detect error on the outdoor unit Detection main PCB.

  • Page 308: Missing Of Ground Leakage Detection Core

    Troubleshooting by Error Code SiUS342303E 3.34 Missing of Ground Leakage Detection Core Applicable All outdoor unit models Models Error Code Sub code: 06, 07 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 309: Activation Of High Pressure Switch

    SiUS342303E Troubleshooting by Error Code 3.35 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 310 Troubleshooting by Error Code SiUS342303E 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 311: Activation Of Low Pressure Sensor

    SiUS342303E Troubleshooting by Error Code 3.36 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 312: Compressor Motor Lock

    Troubleshooting by Error Code SiUS342303E 3.37 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 313 SiUS342303E Troubleshooting by Error Code 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 314: Compressor Damage Alarm

    Troubleshooting by Error Code SiUS342303E 3.38 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 315 SiUS342303E Troubleshooting by Error Code 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 316: Outdoor Fan Motor Abnormality

    Troubleshooting by Error Code SiUS342303E 3.39 Outdoor Fan Motor Abnormality Applicable All outdoor unit models 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 317 SiUS342303E Troubleshooting by Error Code 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 318: Electronic Expansion Valve Coil Abnormality Or Sub Pcb Momentary Overcurrent

    Troubleshooting by Error Code SiUS342303E 3.40 Electronic Expansion Valve Coil Abnormality or Sub PCB Momentary Overcurrent 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 319: Discharge Pipe Temperature Abnormality

    SiUS342303E Troubleshooting by Error Code 3.41 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 320 Troubleshooting by Error Code SiUS342303E 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 321: Wet Alarm

    SiUS342303E Troubleshooting by Error Code 3.42 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 322 Troubleshooting by Error Code SiUS342303E 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 323: Refrigerant Overcharged

    SiUS342303E Troubleshooting by Error Code 3.43 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 324: Thermistor Abnormality

    Troubleshooting by Error Code SiUS342303E 3.44 Thermistor Abnormality Applicable All outdoor unit models Models H1, 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 325: Harness Abnormality (Between Outdoor Unit Main Pcb And Inverter Pcb)

    SiUS342303E Troubleshooting by Error Code 3.45 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 326: Outdoor Fan Pcb Abnormality

    Troubleshooting by Error Code SiUS342303E 3.46 Outdoor Fan PCB Abnormality Applicable All outdoor unit models 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 Causes Troubleshooting Be sure to turn off the power switch before connecting or disconnecting...

  • Page 327: High Pressure Sensor Abnormality

    SiUS342303E Troubleshooting by Error Code 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 328: Low Pressure Sensor Abnormality

    Troubleshooting by Error Code SiUS342303E 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 329: Inverter Pcb Abnormality

    SiUS342303E Troubleshooting by Error Code 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 330 Troubleshooting by Error Code SiUS342303E 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 331: Inverter Radiation Fin Temperature Rise Abnormality

    SiUS342303E Troubleshooting by Error Code 3.50 Inverter Radiation Fin Temperature Rise Abnormality 3.50.1 Inverter Radiation Fin Temperature Rise Abnormality (Inverter PCB) Applicable All outdoor unit models Models Error Code Sub code: 01, 02, 09, 10 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 332 Troubleshooting by Error Code SiUS342303E 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 333 SiUS342303E Troubleshooting by Error Code 3.50.2 Inverter Radiation Fin Temperature Rise Abnormality (Fan PCB) Applicable All outdoor unit models Models Error Code Sub code: 06, 07, 18, 19 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 334: Compressor Instantaneous Overcurrent

    Troubleshooting by Error Code SiUS342303E 3.51 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 335 SiUS342303E Troubleshooting by Error Code Power OFF CHECK 4 Is the power Replace the inverter PCB. transistor normal? 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 336: Compressor Overcurrent

    Troubleshooting by Error Code SiUS342303E 3.52 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 337 SiUS342303E Troubleshooting by Error Code Power OFF CHECK 4 Is the power Replace the inverter PCB. transistor normal? Restarting the system results Continue operation. in the recurrence of The error could have the error. resulted from causes such as instantaneous power failure.

  • Page 338: Compressor Startup Abnormality

    Troubleshooting by Error Code SiUS342303E 3.53 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 339 SiUS342303E Troubleshooting by Error Code 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 relevant Replace the compressor.

  • Page 340: Transmission Error Between Inverter Pcb And Outdoor Unit Main Pcb

    Troubleshooting by Error Code SiUS342303E 3.54 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 341 SiUS342303E Troubleshooting by Error Code microcomputer normal monitor indication This is not the LC error. lamp (green) on the outdoor unit main PCB (A1P) Recheck the error code. is blinking. microcomputer normal monitor indication The fuse of the Replace the inverter PCB. lamp (green) on the outdoor noise filter PCB has unit main PCB (A1P) is...

  • Page 342: Power Supply Voltage Imbalance

    Troubleshooting by Error Code SiUS342303E 3.55 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 343  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 344: Inverter Radiation Fin Temperature Abnormality

    Troubleshooting by Error Code SiUS342303E 3.56 Inverter Radiation Fin Temperature Abnormality 3.56.1 Inverter Radiation Fin Temperature Abnormality (Inverter PCB) Applicable All outdoor unit models Models Error Code Sub code: 09-13 Method of Error Detect the resistance of the following thermistors while the compressor is not running: Detection ...
  • Page 345 SiUS342303E Troubleshooting by Error Code 3.56.2 Inverter Radiation Fin Temperature Abnormality (Fan PCB) Applicable All outdoor unit models Models Error Code Sub code: 02, 03, 15, 16 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 346: Field Setting Abnormality After Replacing Outdoor Unit Main Pcb Or Combination Of Pcb Abnormality

    Troubleshooting by Error Code SiUS342303E 3.57 Field Setting Abnormality after Replacing Outdoor Unit Main PCB 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 347: Refrigerant Shortage

    SiUS342303E Troubleshooting by Error Code 3.58 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 348: Reverse Phase, Open Phase, Power Supply Frequency Issue

    Troubleshooting by Error Code SiUS342303E 3.59 Reverse Phase, Open Phase, Power Supply Frequency Issue Applicable All outdoor unit models 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 349: Power Supply Insufficient Or Instantaneous Abnormality

    SiUS342303E Troubleshooting by Error Code 3.60 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) or 380 VDC (for 460 V models).
  • Page 350 Troubleshooting by Error Code SiUS342303E 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 351: Check Operation Not Executed

    SiUS342303E Troubleshooting by Error Code 3.61 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 352: Transmission Error Between Indoor Units And Outdoor Units, Open Phase In Power Supply Wiring

    Troubleshooting by Error Code SiUS342303E 3.62 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 353 SiUS342303E Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check for details of error in monitor mode. U4-01 Refer to troubleshooting U4-03 (Indoor unit system transmission error) Check the power supply wiring.
  • Page 354 Troubleshooting by Error Code SiUS342303E 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 355: Transmission Error Between Remote Controller And Indoor Unit

    SiUS342303E Troubleshooting by Error Code 3.63 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 356: Transmission Error Between Outdoor Units

    Troubleshooting by Error Code SiUS342303E 3.64 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 357 SiUS342303E Troubleshooting by Error Code Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Ensure the sub code or the lamp display of monitor mode, and then go to the following: U7-01 Error code Sub code...
  • Page 358 Troubleshooting by Error Code SiUS342303E 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 359 SiUS342303E Troubleshooting by Error Code 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 360 Troubleshooting by Error Code SiUS342303E Diagnosis Flowchart-3 U7-03 Error code Sub code (Transmission error between Master and Sub units) multi transmission wirings to multi Sub unit Replace the outdoor unit main have caused wiring disconnection in them or are being PCB (A1P) for multi Sub unit.
  • Page 361 SiUS342303E Troubleshooting by Error Code Diagnosis Flowchart-6 U7-07 Error code Sub code (Connection 4 or more outdoor units to the same system) 4 or more outdoor units are connected using Replace the outdoor unit main the outdoor unit multi PCB (A1P). transmission wirings.

  • Page 362: Transmission Error Between Main And Sub Remote Controllers

    Troubleshooting by Error Code SiUS342303E 3.65 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 363: Transmission Error Between Indoor Units And Outdoor Units In The Same System

    SiUS342303E Troubleshooting by Error Code 3.66 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 364: Improper Combination Of Indoor Unit And Outdoor Unit

    Troubleshooting by Error Code SiUS342303E 3.67 Improper Combination of Indoor Unit and Outdoor Unit Applicable All indoor unit models Models All outdoor unit models Error Code Method of Error  A difference occurs in data by the type of refrigerant between indoor and outdoor units. Detection ...
  • Page 365 SiUS342303E Troubleshooting by Error Code Diagnosis Flowchart-1 UA-17 Error code Sub code Is the number of indoor units model of indoor unit connected to the same system Replace the outdoor unit main FXTQ-TA? is less than 64. PCB (A1P). Incorrect electric heater capacity setting Replace the outdoor unit main...
  • Page 366 Troubleshooting by Error Code SiUS342303E Diagnosis Flowchart-4 UA-21 Error code Sub code Replace the outdoor unit main PCB (A1P). Diagnosis Flowchart-5 UA-31 Error code Sub code Is the multi combination of Correct the multi combination of outdoor units outdoor units. proper? Was the outdoor unit main...

  • Page 367: Incorrect Gas Furnace Connecting Number

    SiUS342303E Troubleshooting by Error Code 3.68 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 368: Incorrect Electric Heater Capacity Setting

    Troubleshooting by Error Code SiUS342303E 3.69 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 369: Address Duplication Of Centralized Controller

    SiUS342303E Troubleshooting by Error Code 3.70 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 370: Transmission Error Between Centralized Controller And Indoor Unit

    Troubleshooting by Error Code SiUS342303E 3.71 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 371 SiUS342303E 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 the indoor unit for which UE is displayed. Is the transmission error UE caused on all Go to the next page.
  • Page 372 Troubleshooting by Error Code SiUS342303E 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 373: System Not Set Yet

    SiUS342303E Troubleshooting by Error Code 3.72 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 374: System Abnormality, Refrigerant System Address Undefined

    Troubleshooting by Error Code SiUS342303E 3.73 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 375 SiUS342303E Troubleshooting by Error Code 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 376: Climate Talk Communication System Combination Error (Before Initial Setting For Communication Completes)

    Troubleshooting by Error Code SiUS342303E 3.74 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 377: Climate Talk Communication System Combination Error (After Initial Setting For Communication Completes)

    SiUS342303E Troubleshooting by Error Code 3.75 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 378: Check

    Check SiUS342303E 4. Check Regarding the check of the low-temperature hydrobox (HXY-TA), refer to the service manual SiUS392016EA. 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 Bent or crashed pipe...

  • Page 379: Low Pressure Check

    SiUS342303E Check 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.) Defective sensor corresponding to the measurement value of the pressure sensor? compressor Defective outdoor unit Defective...
  • Page 380 Check SiUS342303E Reference CHECK 7 Refer to page 379. Reference CHECK 8 Refer to page 380. Part 6 Service Diagnosis...

  • Page 381: Superheat Operation Check

    SiUS342303E Check 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 382 Check SiUS342303E 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 379.

  • Page 383: Power Transistor Check

    SiUS342303E Check Power Transistor Check CHECK 4 Perform the following procedures prior to check. (1) Power OFF. (2) Remove all the wiring connected to the PCB where power transistors are mounted on. Preparation  Prepare the analog type of multimeter. h Multimeter For the digital type of multimeter, those with diode check function are available for the checking.
  • Page 384 Check SiUS342303E  RXYQ72AATJ*, RXYQ144/168AATJ* (M2C), RXYQ192/216/240AATJ* (M1C, M2C) 230 V 160P  RXYQ-AAYD* 460 V 1P/16P Part 6 Service Diagnosis...

  • Page 385: Refrigerant Overcharge Check

    SiUS342303E 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 386: Refrigerant Shortage Check

    Check SiUS342303E 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 387: Vacuuming And Dehydration Procedure

    SiUS342303E 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 388: Thermistor Check

    Check SiUS342303E 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-TB Type B — Type A FXUQ-PA Type C —...
  • Page 389 SiUS342303E Check Thermistor temperature Resistance (k) (°C) (°F) Type A Type B Type C –30 –22 363.8 — — –25 –13 266.8 — — –20 –4 197.8 — — –15 148.2 — — –10 112.0 111.1 111.8 –5 85.52 84.95 85.42 65.84 65.53...
  • Page 390 Check SiUS342303E Thermistor temperature Resistance (k) (°C) (°F) Type H Type J Type N –30 –22 3407 352.1 363.4 –25 –13 2540 261.2 266.7 –20 –4 1910 195.4 197.8 –15 1449 147.3 148.2 –10 1108 111.8 112.1 –5 853.8 85.49 85.51 662.7 65.80...

  • Page 391: Pressure Sensor Check

    SiUS342303E 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 392: Broken Wire Check Of The Relay Wires

    Check SiUS342303E 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 393: Fan Motor Connector Check (Power Supply Cable)

    SiUS342303E 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 394 Check SiUS342303E Indoor Unit FXDQ-M, FXHQ-M 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 395: Fan Motor Connector Check (Signal Cable)

    SiUS342303E Check 4.12 Fan Motor Connector Check (Signal Cable) CHECK 17 Resistance measuring points and judgment criteria. Indoor Unit FXFQ-T, FXZQ-TB, FXSQ05-48TB, FXMQ07-12PB, FXMQ15-24TB, FXAQ-P White Orange Brown Blue — — — — Measuring points Judgment criteria 1  or more 1 - 4 1 ...
  • Page 396 Check SiUS342303E FXSQ54TB, FXMQ15-54PB, FXMQ30-54TB Gray (5) Pink (4) Orange (3) Blue (2) Yellow (1) Measuring points Judgment criteria 1  or more 5 - 4 1  or more 5 - 3 1  or more 5 - 2 1 ...

  • Page 397: Electronic Expansion Valve Coil Check

    SiUS342303E Check 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 (RXYQ72AA), Y6E White (1)
  • Page 398 Check SiUS342303E Indoor Unit FXFQ-T, FXZQ-TB, FXUQ-PA, FXEQ-P, FXSQ-TB, FXMQ-TB, FXTQ-TA, CXTQ-TA Orange (1) Red (2) Yellow (3) Black (4) — (5) Gray (6) Measuring points Judgment criteria 1 - 6 2 - 6 35-55  3 - 6 4 - 6 FXMQ-PB, FXAQ-P White (1) Yellow (2)

  • Page 399: Fan Motor Connector Check For Fxtq-Ta

    SiUS342303E 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 400 Check SiUS342303E The green LED on the diagnostic tool will blink indicating communications between the tool and motor. See table below for indications of tool indicators and motor actions. Replace or repair as needed. Power Green Motor Indication(s) Button Action Confirm 24VAC to UltraCheck-EZ tool.
  • Page 401 SiUS342303E Check Electrical Checks - Low Voltage Control Circuits Turn on power to air handler or modular. Warning Line Voltage now present. Check voltage between pins on the 4-wire motor control harness between the motor and control board. Voltage on pins should read: Pins 1 to 4 = 3.3vdc Pins 1 to 2 = 3.3vdc Pins 3 to 4 = 15vdc...
  • Page 402 Check SiUS342303E Locate the 3-circuit connector in the control/end bell. Using an ohmmeter, check the resistance between each terminal in the connector. If the resistance is 1 M or greater, the control/end bell is functioning properly. Replace the control/end bell if the resistance is lower than 1 M.

  • Page 403: Part 7 Appendix

    SiUS342303E Part 7 Appendix 1. Wiring Diagrams..................397 1.1 Outdoor Unit ..................... 397 1.2 Indoor Unit....................399 1.3 Air Treatment Equipment ................. 415 2. Electrical Component Box Removal............418 Part 7 Appendix...

  • Page 404: Wiring Diagrams

    Wiring Diagrams SiUS342303E 1. Wiring Diagrams Outdoor Unit RXYQ72/96/120/144/168/192/216/240AATJA Part 7 Appendix...
  • Page 405 SiUS342303E Wiring Diagrams RXYQ72/96/120/144/168/192/216/240AAYDA Part 7 Appendix...

  • Page 406: Indoor Unit

    Wiring Diagrams SiUS342303E Indoor Unit FXFQ07/09/12/15/18/24/30/36/48TVJU* Part 7 Appendix...
  • Page 407 SiUS342303E Wiring Diagrams BYCQ125BGW1 (Self-Cleaning Decoration Panel for FXFQ-TVJU*) Part 7 Appendix...
  • Page 408 Wiring Diagrams SiUS342303E FXZQ05/07/09/12/15/18TBVJU* Part 7 Appendix...
  • Page 409 SiUS342303E Wiring Diagrams FXUQ18/24/30/36PAVJU* Part 7 Appendix...
  • Page 410 Wiring Diagrams SiUS342303E FXEQ07/09/12/15/18/24PVJU* Part 7 Appendix...
  • Page 411 SiUS342303E Wiring Diagrams FXDQ07/09/12/18/24MVJU* Part 7 Appendix...
  • Page 412 Wiring Diagrams SiUS342303E FXSQ05/07/09/12/15/18/24/30/36/48/54TBVJU Part 7 Appendix...
  • Page 413 SiUS342303E Wiring Diagrams FXMQ07/09/12/15/18/24/30/36/48/54PBVJU* Part 7 Appendix...
  • Page 414 Wiring Diagrams SiUS342303E FXMQ15/18/24/30/36/48/54TBVJU Part 7 Appendix...
  • Page 415 SiUS342303E Wiring Diagrams FXMQ72/96MVJU* Part 7 Appendix...
  • Page 416 Wiring Diagrams SiUS342303E FXHQ12/24/36MVJU* Part 7 Appendix...
  • Page 417 SiUS342303E Wiring Diagrams FXAQ07/09/12/18/24PVJU* Part 7 Appendix...
  • Page 418 Wiring Diagrams SiUS342303E FXLQ07/09/12/18/24MVJU*, FXNQ07/09/12/18/24MVJU* Part 7 Appendix...
  • Page 419 SiUS342303E Wiring Diagrams FXTQ09/12/18/24/30/36/42/48/54/60TAVJUA(D)* Part 7 Appendix...
  • Page 420 Wiring Diagrams SiUS342303E CXTQ24/36/48/60TASBLU* Part 7 Appendix...
  • Page 421 SiUS342303E Wiring Diagrams HXY48TAVJU Part 7 Appendix...

  • Page 422: Air Treatment Equipment

    Wiring Diagrams SiUS342303E Air Treatment Equipment 1.3.1 Outdoor-Air Processing Unit FXMQ48/72/96MFVJU* Part 7 Appendix...
  • Page 423 SiUS342303E Wiring Diagrams 1.3.2 Energy Recovery Ventilator (VAM Series) VAM300/470/600GVJU* Part 7 Appendix...
  • Page 424 Wiring Diagrams SiUS342303E VAM1200GVJU* Part 7 Appendix...

  • Page 425: Electrical Component Box Removal

    SiUS342303E Electrical Component Box Removal 2. Electrical Component Box Removal 1. Remove the screws. Screw (×3) 2. Lift the mounting plate up and fasten the hook. Part 7 Appendix...
  • Page 426 Electrical Component Box Removal SiUS342303E 3. Remove the screws. 2-compressor Type Screw (×5) 1-compressor Type Screw (×3) Part 7 Appendix...
  • Page 427 SiUS342303E Electrical Component Box Removal 4. Pull out the refrigerant jacket. θ θ max. = 110° Do not open more than 110° (The piping might crack when coming in contact with surrounding parts) Axis of rotation Part 7 Appendix...
  • Page 428 Electrical Component Box Removal SiUS342303E 5. Remove the screws. Screw (×8) 6. Remove the electrical component box. Part 7 Appendix...
  • Page 429 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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