Daikin REYQ72-432XAYCU Service Manual Download Page 390 | Manualshive

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Troubleshooting by Error Code

SiUS371901EB

383

Part 6 Service Diagnosis

3.63 Power Supply Insufficient or Instantaneous Abnormality

Applicable
Models

All outdoor unit models

Error Code

U2

Method of Error
Detection

Detect the voltage of capacitor of the main circuit in the inverter PCB.

Error Decision
Conditions

When the voltage in the DC circuit (between diode module and power module) falls below 190 VDC
(for 208/230 V models), 380 VDC (for 460 V models) or 560 VDC (for 575 V models).

Supposed
Causes



Abnormal power supply voltage



Instantaneous power failure



Open phase



Defective inverter PCB



Defective outdoor unit main PCB



Defective compressor



Defective main circuit wiring



Defective fan motor



Defective connection of signal cable

Troubleshooting

There are

some defects in the

power supply conditions

aforementioned.

The insulation

resistance of the

compressor is less than

100 k

.

NO

YES

YES

Fix the defects.

Replace the compressor
(M1C).

Check for power supply
conditions.
(1) Power supply voltage falls

within ±10% of the rated
voltage?

(2) Any open phase in the

power supply wiring or any
wrong wiring?

(3) Imbalance in the power

supply voltage is
maintained within 12 V?

A

NO

Caution

Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.

Go to the next page.

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Summary of Contents for REYQ72-432XAYCU

Page 1: ...Service Manual Heat Recovery 60 Hz REYQ72 456XATJU A REYQ72 456XAYDU A REYQ72 432XAYCU A SiUS371901EB ...

Page 2: ...acity Range 17 4 1 Combination Ratio 17 4 2 Outdoor Unit Combinations 18 4 3 Limitation of Capacity Index for Heat Recovery 19 5 Specifications 20 5 1 REYQ XATJU A 20 5 2 REYQ XAYDU A 37 5 3 REYQ XAYCU A 54 Part 2 Refrigerant Circuit 70 1 Refrigerant Circuit Piping Diagrams 71 1 1 Outdoor Unit 71 1 2 Indoor Unit 75 1 3 Outdoor Air Processing Unit 77 1 4 Branch Selector Unit 78 2 Functional Parts L...

Page 3: ... 6 1 BRC1E73 122 7 Administrator Menu Installer Menu 126 7 1 BRC1H71W 126 Part 4 Functions and Control 127 1 Operation Flowchart 129 1 1 Outdoor Unit 129 1 2 Branch Selector Unit Indoor Unit Operation Mode Detail 130 2 Stop Control 131 2 1 Stop due to Error 131 2 2 When System is in Stop Mode 131 2 3 Slave Unit Stops during Master Unit Operation 131 3 Standby Control 132 3 1 Restart Standby 132 3 ...

Page 4: ...ouver Control for Preventing Ceiling Dirt 177 9 11 Heater Control Except FXTQ TA Models 178 9 12 Heater Control FXTQ TA Models 179 9 13 Gas Furnace Control CXTQ TA Models 182 9 14 3 Step Thermostat Processing FXTQ TA Models 183 9 15 Fan Control Heater Residual FXTQ TA Models 184 9 16 Interlocked with External Equipment FXTQ TA and CXTQ TA Models 184 Part 5 Field Settings and Test Operation 186 1 F...

Page 5: ...s 277 3 2 Error Codes Sub Codes 280 3 3 External Protection Device Abnormality 290 3 4 Indoor Unit Control PCB Abnormality 292 3 5 Drain Level Control System Abnormality 293 3 6 Indoor Fan Motor Lock Overload 295 3 7 Indoor Fan Motor Abnormality 297 3 8 Overload Overcurrent Lock of Indoor Fan Motor 301 3 9 Blower Motor Not Running 302 3 10 Indoor Fan Motor Status Abnormality 303 3 11 Low Indoor Ai...

Page 6: ... 49 Inverter PCB Abnormality 359 3 50 Momentary Power Failure during Test Operation 361 3 51 Reactor Temperature Rise Abnormality 362 3 52 Inverter Radiation Fin Temperature Rise Abnormality 363 3 53 Compressor Instantaneous Overcurrent 366 3 54 Compressor Overcurrent 368 3 55 Compressor Startup Abnormality 370 3 56 Transmission Error between Inverter PCB and Outdoor Unit Main PCB 372 3 57 Power S...

Page 7: ...nitial Setting for Communication Completes 415 4 Check 416 4 1 High Pressure Check 416 4 2 Low Pressure Check 417 4 3 Superheat Operation Check 419 4 4 Power Transistor Check 421 4 5 Refrigerant Overcharge Check 426 4 6 Refrigerant Shortage Check 427 4 7 Vacuuming and Dehydration Procedure 428 4 8 Thermistor Check 429 4 9 Pressure Sensor Check 432 4 10 Broken Wire Check of the Relay Wires 433 4 11...

Page 8: ...US371901EB 1 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: ...struction is shown in the illustration or near the symbol 1 1 Warnings and Cautions Regarding Safety of Workers This manual is for the person in charge of maintenance and inspection Warning Do not store equipment in a room with fire sources e g naked flames gas appliances electric heaters Be sure to disconnect the power cable from the socket before disassembling equipment for repair Working on equ...

Page 10: ...nt The use of materials for other refrigerant models may cause a serious accident such as damage to the refrigerant cycle or equipment failure 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 Caution Do not repair electrical components with wet ha...

Page 11: ...the same power outlet with other electrical appliances since it may cause an electrical shock excessive heat generation or fire Be sure to use an exclusive power circuit for the equipment and follow the local technical standards related to the electrical equipment the internal wiring regulations and the instruction manual for installation when conducting electrical work Insufficient power circuit ...

Page 12: ...make sure that the power cable plug is not dirty or loose then insert the plug into a power outlet securely If the plug is dusty or has a loose connection it may cause an electrical shock or fire When replacing the coin battery in the remote controller be sure to dispose of the old battery to prevent children from swallowing it If a child swallows the coin battery see a doctor immediately Caution ...

Page 13: ...ance is 1 MΩ or greater Faulty insulation may cause an electrical shock Be sure to check the drainage of the indoor unit after the repair Faulty drainage may cause water to enter the room and wet the furniture and floor Do not tilt the unit when removing it The water inside the unit may spill and wet the furniture and floor Caution ...

Page 14: ...ution is used when there is danger that the reader through incorrect manipulation may damage equipment lose data get an unexpected result or have to restart part of a procedure Note Note Note provides information that is not indispensable but may nevertheless be valuable to the reader such as tips and tricks Reference Reference Reference guides the reader to other places in this binder or in this ...

Page 15: ...ction 8 3 Revision History Month Year Version Revised contents 12 2018 SiUS371901E First edition 03 2020 SiUS371901EA Model addition REYQ72 456XATJA REYQ72 456XAYDA REYQ72 432XAYCA 02 2021 SiUS371901EB Model addition BSF4 8Q54TVJ BRC1H71W ...

Page 16: ...13 2 2 Outdoor Unit 14 2 3 Air Treatment Equipment 15 2 4 Branch Selector Unit 15 3 Combination of Outdoor Units 16 3 1 REYQ XATJU A REYQ XAYDU A REYQ XAYCU A 16 4 Capacity Range 17 4 1 Combination Ratio 17 4 2 Outdoor Unit Combinations 18 4 3 Limitation of Capacity Index for Heat Recovery 19 5 Specifications 20 5 1 REYQ XATJU A 20 5 2 REYQ XAYDU A 37 5 3 REYQ XAYCU A 54 Part 1 General Information...

Page 17: ...0P 36P One way blow cassette type FXEQ 07P 09P 12P 15P 18P 24P Slim ceiling mounted duct type FXDQ 07M 09M 12M 18M 24M MSP concealed ducted type FXSQ 05TA 07TA 09TA 12TA 15TA 18TA 24TA 30TA 36TA 48TA 54TA Ceiling mounted duct type Middle and high static pressure FXMQ 07PB 09PB 12PB 15PB 18PB 24PB 30PB 36PB 48PB 54PB Ceiling mounted duct type FXMQ 72M 96M Ceiling suspended type FXHQ 12M 24M 36M Wal...

Page 18: ...y range ton 6 8 10 12 14 16 Power supply Standard Capacity index 72 96 120 144 168 192 Heat recovery REYQ 72XA 96XA 120XA 144XA 168XA 192XA YD Capacity range ton 18 20 22 24 26 28 Power supply Standard Capacity index 216 240 264 288 312 336 Heat recovery REYQ 216XA 240XA 264XA 288XA 312XA 336XA YD Capacity range ton 30 32 34 36 38 Power supply Standard Capacity index 360 384 408 432 456 Heat recov...

Page 19: ...PVJU VJ 1 phase 208 230 V 60 Hz Outdoor Air Processing Unit Series Model name Power supply Standard FXMQ 48MF 72MF 96MF VJU Energy Recovery Ventilator VAM series Series Model name Power supply Standard VAM 300G 470G 600G 1200G VJU Single Branch Selector Unit Series Model name Power supply Standard BSQ 36T 60T 96T VJ Multi Branch Selector Unit Series Model name Power supply Standard Standard series...

Page 20: ...type FXZQ TA Ceiling suspended type FXHQ M 4 way blow ceiling suspended type FXUQ P Wall mounted type FXAQ P One way blow cassette type FXEQ P Floor standing type FXLQ M Slim ceiling mounted duct type FXDQ M Concealed floor standing type FXNQ M MSP concealed ducted type FXSQ TA Air handling unit FXTQ TA Ceiling mounted duct type Middle and high static pressure FXMQ PB Cased coil unit CXTQ TA Shown...

Page 21: ...Unit Triple Outdoor Unit REYQ72 96 120 144 168XATJU A REYQ72 96 120 144 168XAYDU A REYQ72 96 120 144 168XAYCU A REYQ192 216 240 264 288 312 336XATJU A REYQ192 216 240 264 288 312 336XAYDU A REYQ192 216 240 264 288 312 336XAYCU A REYQ360 384 408 432 456XATJU A REYQ360 384 408 432 456XAYDU A REYQ360 384 408 432XAYCU A ...

Page 22: ...2 3 Air Treatment Equipment 2 4 Branch Selector Unit Outdoor air processing unit FXMQ MF Energy recovery ventilator VAM series VAM G Single Branch Selector Unit BSQ T Multi Branch Selector Unit Standard Series BS Q54T Multi Branch Selector Unit Flex Series BSF Q54T ...

Page 23: ...odule Outdoor unit multi connection piping kit 1 72 96 120 144 168 6 1 h 8 1 h 10 1 h 12 1 h 14 1 h 16 2 hh BHFP26P100U BHFP26P100UA 18 2 h h 20 2 hh 22 2 h h 24 2 hh 26 2 h h 28 2 hh 30 3 hhh BHFP26P151U BHFP26P151UA 32 3 hh h 34 3 h hh 36 3 hhh 38 2 3 hh h Notes 1 For multiple connection the outdoor unit multi connection piping kit separately sold is required 2 Except REYQ XAYCU A ...

Page 24: ... 4 REYQ72XATJU A REYQ72XAYDU A REYQ72XAYCU A 70 If the operational capacity of indoor units is more than 130 low airflow operation is enforced in all the indoor units This limitation can be deactivated through field setting Refer to page 243 for detail When outdoor air processing units FXMQ MF and standard indoor units are connected the total connection capacity of the outdoor air processing units...

Page 25: ...240XAYCU A 264XATJU A 264XAYDU A 264XAYCU A 288XATJU A 288XAYDU A 288XAYCU A 312XATJU A 312XAYDU A 312XAYCU A 336XATJU A 336XAYDU A 336XAYCU A 360XATJU A 360XAYDU A 360XAYCU A 384XATJU A 384XAYDU A 384XAYCU A Max number of connectable indoor units 41 45 49 54 58 62 64 Total capacity index of indoor units to be connected 1 120 312 384 132 343 422 144 374 460 156 405 499 168 436 537 180 468 468 192 ...

Page 26: ...imum capacity index of connectable indoor units per branch 1 54 or less 54 or less 54 or less Series configuration Maximum capacity index of connectable indoor units per branch selector unit 144 or less 162 or less 162 or less Maximum capacity index of connectable indoor units with branch selector units connected in series 230 or less 230 or less 230 or less Parallel configuration Maximum capacity...

Page 27: ...ng connection High Low pressure gas pipe in mm φ 5 8 15 9 C1220T Brazing connection Weight lbs kg 727 330 Sound pressure level Reference data dB A 58 63 5 3 Sound power level Reference data dB 79 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defrost method Deicer Capacity control 15 100 Refrigerant Refrigerant n...

Page 28: ...gh Low pressure gas pipe in mm φ 3 4 19 1 C1220T Brazing connection Weight lbs kg 727 330 Sound pressure level Reference data dB A 61 64 5 3 Sound power level Reference data dB 80 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defrost method Deicer Capacity control 13 100 Refrigerant Refrigerant name R 410A Charg...

Page 29: ... High Low pressure gas pipe in mm φ 3 4 19 1 C1220T Brazing connection Weight lbs kg 727 330 Sound pressure level Reference data dB A 61 65 3 Sound power level Reference data dB 80 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defrost method Deicer Capacity control 11 100 Refrigerant Refrigerant name R 410A Ch...

Page 30: ...tion High Low pressure gas pipe in mm φ 7 8 22 2 C1220T Brazing connection Weight lbs kg 793 360 Sound pressure level Reference data dB A 65 Sound power level Reference data dB 87 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defrost method Deicer Capacity control 14 100 Refrigerant Refrigerant name R 410A Charg...

Page 31: ... High Low pressure gas pipe in mm φ 7 8 22 2 C1220T Brazing connection Weight lbs kg 793 360 Sound pressure level Reference data dB A 65 65 5 3 Sound power level Reference data dB 88 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defrost method Deicer Capacity control 12 100 Refrigerant Refrigerant name R 410A Ch...

Page 32: ...connection Suction gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 727 330 330 Sound pressure level Reference data dB A 64 67 5 3 Sound power level Reference data dB 83 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device De...

Page 33: ... connection Suction gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 727 330 330 Sound pressure level Reference data dB A 64 68 3 Sound power level Reference data dB 83 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device D...

Page 34: ...g connection Suction gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 727 330 330 Sound pressure level Reference data dB A 64 68 3 Sound power level Reference data dB 83 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device ...

Page 35: ...g connection Suction gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 793 330 360 Sound pressure level Reference data dB A 66 5 68 3 Sound power level Reference data dB 88 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device ...

Page 36: ...zing connection Suction gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 793 793 360 360 Sound pressure level Reference data dB A 68 Sound power level Reference data dB 90 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defr...

Page 37: ... connection Suction gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 793 793 360 360 Sound pressure level Reference data dB A 68 68 5 3 Sound power level Reference data dB 90 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device...

Page 38: ...g connection Suction gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 793 793 360 360 Sound pressure level Reference data dB A 68 68 5 3 Sound power level Reference data dB 91 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device ...

Page 39: ...uid pipe in mm φ 3 4 19 1 C1220T Brazing connection Suction gas pipe in mm φ 1 5 8 41 3 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 727 330 330 330 Sound pressure level Reference data dB A 66 70 3 Sound power level Reference data dB 85 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inv...

Page 40: ...uid pipe in mm φ 3 4 19 1 C1220T Brazing connection Suction gas pipe in mm φ 1 5 8 41 3 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 793 330 330 360 Sound pressure level Reference data dB A 67 5 70 3 Sound power level Reference data dB 89 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inv...

Page 41: ...uid pipe in mm φ 3 4 19 1 C1220T Brazing connection Suction gas pipe in mm φ 1 5 8 41 3 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 793 330 330 360 Sound pressure level Reference data dB A 69 70 3 Sound power level Reference data dB 90 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inv...

Page 42: ... Liquid pipe in mm φ 3 4 19 1 C1220T Brazing connection Suction gas pipe in mm φ 1 5 8 41 3 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 793 330 330 360 Sound pressure level Reference data dB A 70 Sound power level Reference data dB 92 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Invert...

Page 43: ...Liquid pipe in mm φ 3 4 19 1 C1220T Brazing connection Suction gas pipe in mm φ 1 5 8 41 3 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 793 330 330 360 Sound pressure level Reference data dB A 70 Sound power level Reference data dB 92 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inver...

Page 44: ...on High Low pressure gas pipe in mm φ 5 8 15 9 C1220T Brazing connection Weight lbs kg 727 330 Sound pressure level Reference data dB A 58 63 5 3 Sound power level Reference data dB 79 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defrost method Deicer Capacity control 15 100 Refrigerant Refrigerant name R 410A ...

Page 45: ... Low pressure gas pipe in mm φ 3 4 19 1 C1220T Brazing connection Weight lbs kg 727 330 Sound pressure level Reference data dB A 61 64 5 3 Sound power level Reference data dB 80 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defrost method Deicer Capacity control 13 100 Refrigerant Refrigerant name R 410A Charge ...

Page 46: ...igh Low pressure gas pipe in mm φ 3 4 19 1 C1220T Brazing connection Weight lbs kg 727 330 Sound pressure level Reference data dB A 61 65 3 Sound power level Reference data dB 80 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defrost method Deicer Capacity control 11 100 Refrigerant Refrigerant name R 410A Char...

Page 47: ...on High Low pressure gas pipe in mm φ 7 8 22 2 C1220T Brazing connection Weight lbs kg 793 360 Sound pressure level Reference data dB A 65 Sound power level Reference data dB 87 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defrost method Deicer Capacity control 14 100 Refrigerant Refrigerant name R 410A Charge ...

Page 48: ...igh Low pressure gas pipe in mm φ 7 8 22 2 C1220T Brazing connection Weight lbs kg 793 360 Sound pressure level Reference data dB A 65 65 5 3 Sound power level Reference data dB 88 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defrost method Deicer Capacity control 12 100 Refrigerant Refrigerant name R 410A Char...

Page 49: ...nnection Suction gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 727 330 330 Sound pressure level Reference data dB A 64 67 5 3 Sound power level Reference data dB 83 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defr...

Page 50: ...onnection Suction gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 727 330 330 Sound pressure level Reference data dB A 64 68 3 Sound power level Reference data dB 83 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Def...

Page 51: ...connection Suction gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 727 330 330 Sound pressure level Reference data dB A 64 68 3 Sound power level Reference data dB 83 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device De...

Page 52: ...connection Suction gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 793 330 360 Sound pressure level Reference data dB A 66 5 58 3 Sound power level Reference data dB 88 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device De...

Page 53: ...ng connection Suction gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 793 793 360 360 Sound pressure level Reference data dB A 68 Sound power level Reference data dB 90 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defros...

Page 54: ...onnection Suction gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 793 793 360 360 Sound pressure level Reference data dB A 68 68 5 3 Sound power level Reference data dB 90 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device D...

Page 55: ...connection Suction gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 793 793 360 360 Sound pressure level Reference data dB A 68 68 5 3 Sound power level Reference data dB 91 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device De...

Page 56: ...d pipe in mm φ 3 4 19 1 C1220T Brazing connection Suction gas pipe in mm φ 1 5 8 41 3 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 727 330 330 330 Sound pressure level Reference data dB A 66 70 3 Sound power level Reference data dB 85 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inver...

Page 57: ...d pipe in mm φ 3 4 19 1 C1220T Brazing connection Suction gas pipe in mm φ 1 5 8 41 3 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 793 330 330 360 Sound pressure level Reference data dB A 67 5 70 3 Sound power level Reference data dB 89 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inver...

Page 58: ...d pipe in mm φ 3 4 19 1 C1220T Brazing connection Suction gas pipe in mm φ 1 5 8 41 3 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 793 330 330 360 Sound pressure level Reference data dB A 69 70 3 Sound power level Reference data dB 90 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inver...

Page 59: ...iquid pipe in mm φ 3 4 19 1 C1220T Brazing connection Suction gas pipe in mm φ 1 5 8 41 3 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 793 330 330 360 Sound pressure level Reference data dB A 70 Sound power level Reference data dB 92 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter...

Page 60: ...quid pipe in mm φ 3 4 19 1 C1220T Brazing connection Suction gas pipe in mm φ 1 5 8 41 3 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 793 330 330 360 Sound pressure level Reference data dB A 70 Sound power level Reference data dB 92 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverte...

Page 61: ...on High Low pressure gas pipe in mm φ 5 8 15 9 C1220T Brazing connection Weight lbs kg 727 330 Sound pressure level Reference data dB A 58 63 5 3 Sound power level Reference data dB 79 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defrost method Deicer Capacity control 15 100 Refrigerant Refrigerant name R 410A ...

Page 62: ... Low pressure gas pipe in mm φ 3 4 19 1 C1220T Brazing connection Weight lbs kg 727 330 Sound pressure level Reference data dB A 61 64 5 3 Sound power level Reference data dB 80 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defrost method Deicer Capacity control 13 100 Refrigerant Refrigerant name R 410A Charge ...

Page 63: ...igh Low pressure gas pipe in mm φ 3 4 19 1 C1220T Brazing connection Weight lbs kg 727 330 Sound pressure level Reference data dB A 61 65 3 Sound power level Reference data dB 80 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defrost method Deicer Capacity control 11 100 Refrigerant Refrigerant name R 410A Char...

Page 64: ...on High Low pressure gas pipe in mm φ 7 8 22 2 C1220T Brazing connection Weight lbs kg 793 360 Sound pressure level Reference data dB A 65 Sound power level Reference data dB 87 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defrost method Deicer Capacity control 14 100 Refrigerant Refrigerant name R 410A Charge ...

Page 65: ...igh Low pressure gas pipe in mm φ 7 8 22 2 C1220T Brazing connection Weight lbs kg 793 360 Sound pressure level Reference data dB A 65 65 5 3 Sound power level Reference data dB 88 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defrost method Deicer Capacity control 12 100 Refrigerant Refrigerant name R 410A Char...

Page 66: ...nnection Suction gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 727 330 330 Sound pressure level Reference data dB A 64 67 5 3 Sound power level Reference data dB 83 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defr...

Page 67: ...onnection Suction gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 727 330 330 Sound pressure level Reference data dB A 64 68 3 Sound power level Reference data dB 83 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Def...

Page 68: ...connection Suction gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 727 330 330 Sound pressure level Reference data dB A 64 68 3 Sound power level Reference data dB 83 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device De...

Page 69: ...connection Suction gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 793 330 360 Sound pressure level Reference data dB A 66 5 68 3 Sound power level Reference data dB 88 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device De...

Page 70: ...ng connection Suction gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 793 793 360 360 Sound pressure level Reference data dB A 68 Sound power level Reference data dB 90 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device Defros...

Page 71: ...onnection Suction gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 793 793 360 360 Sound pressure level Reference data dB A 68 68 5 3 Sound power level Reference data dB 90 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device D...

Page 72: ...connection Suction gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 793 793 360 360 Sound pressure level Reference data dB A 68 68 5 3 Sound power level Reference data dB 91 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device De...

Page 73: ...d pipe in mm φ 3 4 19 1 C1220T Brazing connection Suction gas pipe in mm φ 1 5 8 41 3 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 727 330 330 330 Sound pressure level Reference data dB A 66 70 3 Sound power level Reference data dB 85 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inver...

Page 74: ...d pipe in mm φ 3 4 19 1 C1220T Brazing connection Suction gas pipe in mm φ 1 5 8 41 3 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 793 330 330 360 Sound pressure level Reference data dB A 67 5 70 3 Sound power level Reference data dB 89 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inver...

Page 75: ...d pipe in mm φ 3 4 19 1 C1220T Brazing connection Suction gas pipe in mm φ 1 5 8 41 3 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 793 330 330 360 Sound pressure level Reference data dB A 69 70 3 Sound power level Reference data dB 90 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inver...

Page 76: ...iquid pipe in mm φ 3 4 19 1 C1220T Brazing connection Suction gas pipe in mm φ 1 5 8 41 3 C1220T Brazing connection High Low pressure gas pipe in mm φ 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 793 330 330 360 Sound pressure level Reference data dB A 70 Sound power level Reference data dB 92 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter...

Page 77: ... A REYQ72 96 120XAYDU A REYQ72 96 120XAYCU A 87 2 2 REYQ144 168XATJU A REYQ144 168XAYDU A REYQ144 168XAYCU A 89 3 Refrigerant Flow for Each Operation Mode 91 3 1 Cooling Operation 91 3 2 Heating Operation 92 3 3 Simultaneous Cooling and Heating Operation 93 3 4 Cooling Oil Return Operation 94 3 5 Defrost Heating Oil Return Operation 95 3 6 Oil Return Operation at Simultaneous Cooling and Heating O...

Page 78: ...valve Heat exchanger lower Used to switch outdoor heat exchanger to evaporator or condenser 14 Y6S Four way valve Heat exchanger upper 15 Y7S Solenoid valve Accumulator oil return Used to return oil from the accumulator to the compressor 16 S1NPH High pressure sensor Used to detect the high pressure 17 S1NPL Low pressure sensor Used to detect the low pressure 18 S1PH High pressure switch This func...

Page 79: ...hermistor Receiver gas purge Used to detect gas pipe temperature of receiver gas purge piping 35 R14T Thermistor M1C body Detects compressor surface temperature this switch is activated at surface temperature of 120 C 248 F or more to stop the compressor 36 R16T Thermistor Subcooling injection Used to control subcooling injection No in piping diagram Electric symbol Name Function ...

Page 80: ... REYQ72 96 120XAYDU A REYQ72 96 120XAYCU A S1PH S1NPH S1NPL C 3D119212 28 R7T 36 R16T 29 R8T 25 R4T 24 R3T 26 R5T 30 R9T 32 R11T 10 Y2S 22 R1T 4 Y2E 8 Y7E 11 Y3S 19 14 Y6S 16 6 Y4E 15 Y7S 9 Y1S 21 13 Y5S 2 M1F M2F 3 Y1E 5 Y3E 7 Y5E 20 27 R6T 35 R14T 33 R12T 23 R21T 1 M1C 18 34 R13T 31 R10T 17 12 Y4S ...

Page 81: ...A REYQ144 168XAYDU A REYQ144 168XAYCU A S1PH S1NPH S1NPL C 3D119213 28 R7T 36 R16T 29 R8T 25 R4T 24 R3T 26 R5T 30 R9T 32 R11T 10 Y2S 22 R1T 4 Y2E 8 Y7E 11 Y3S 19 14 Y6S 16 6 Y4E 15 Y7S 9 Y1S 21 13 Y5S 2 M1F M2F 3 Y1E 5 Y3E 7 Y5E 20 27 R6T 35 R14T 33 R12T 23 R21T 1 M1C 18 34 R13T 31 R10T 17 12 Y4S ...

Page 82: ... for gas superheating degree control while in cooling or subcooling degree control while in heating 4 Gas pipe thermistor R3T R3T R3T Used for gas superheating degree control while in cooling 5 Discharge air thermistor R4T Used for discharge air temperature control FXFQ T FXHQ M FXZQ TA FXUQ P FXEQ P FXSQ TA FXMQ M FXAQ P FXLQ M FXNQ M FXDQ M C 4D024460P 4 3 Indoor heat exchanger Fan Filter Filter...

Page 83: ...Circuit 76 FXMQ PB FXTQ TA CXTQ TA Indoor heat exchanger Fan Filter Filter 4 2 1 3 Gas piping connection port Liquid piping connection port C 4D034245R 5 C 4D068194 4 1 3 Indoor heat exchanger Filter Filter 4 1 3 Gas piping connection port Liquid piping connection port ...

Page 84: ...sed to reduce pressure from high to low in bypassing hot gas 4 R1T Suction air thermistor Used to turn ON or OFF the thermostat 5 R2T Liquid pipe thermistor Used to control the opening degree of electronic expansion valve under the SC control 2 6 R3T Gas pipe thermistor Used to control the opening degree of electronic expansion valve under the SH control 7 R4T Discharge air thermistor Used to cont...

Page 85: ...an indoor unit downstream of this Branch Selector unit is in heating Max 480 pulse 2 Electronic expansion valve EVH Y2E Opens while in heating or all indoor units are in cooling Max 6 000 pulse 3 Electronic expansion valve EVL Y3E Opens while in cooling Max 6 000 pulse BSQ36 60 96TVJ Filter Filter Filter Filter Liquid pipe connection port Gas pipe connection port Double pipe heat exchanger Electro...

Page 86: ...Expansion Valve Subcooling Electronic Expansion Valve Subcooling Electronic Expansion Valve Subcooling Electronic Expansion Valve Subcooling Electronic Expansion Valve HP LP gas 2 3 3 3 3 2 2 2 Electronic Expansion Valve Suction Electronic Expansion Valve HP LP gas Electronic Expansion Valve Suction Electronic Expansion Valve HP LP gas Electronic Expansion Valve Suction Electronic Expansion Valve ...

Page 87: ... F unit Liquid pipe connection port Suction gas pipe connection port HP LP gas pipe connection port Gas pipe connection port Liquid pipe connection port Gas pipe connection port Liquid pipe connection port Gas pipe connection port Liquid pipe connection port Gas pipe connection port Liquid pipe connection port Gas pipe connection port Liquid pipe connection port Gas pipe connection port Liquid pip...

Page 88: ...ection port Liquid pipe connection port Gas pipe connection port Liquid pipe connection port Gas pipe connection port Liquid pipe connection port Gas pipe connection port Liquid pipe connection port Gas pipe connection port Liquid pipe connection port Gas pipe connection port Liquid pipe connection port Gas pipe connection port Liquid pipe connection port Gas pipe connection port Liquid pipe conne...

Page 89: ...ction Electronic Expansion Valve HP LP gas Electronic Expansion Valve Suction Electronic Expansion Valve HP LP gas Electronic Expansion Valve Suction Electronic Expansion Valve HP LP gas Electronic Expansion Valve Suction Electronic Expansion Valve HP LP gas Electronic Expansion Valve Suction Electronic Expansion Valve HP LP gas Electronic Expansion Valve Suction Electronic Expansion Valve HP LP g...

Page 90: ...e connectionport Liquidpipe connectionport Gaspipe connectionport Liquidpipe connectionport Gaspipe connectionport Liquidpipe connectionport Gaspipe connectionport Liquidpipe connectionport Gaspipe connectionport Liquidpipe connectionport Gaspipe connectionport Liquidpipe connectionport Gaspipe connectionport Liquidpipe connectionport Gaspipe connectionport Liquidpipe connectionport Gaspipe connec...

Page 91: ...SiUS371901EB Refrigerant Circuit Piping Diagrams Part 2 Refrigerant Circuit 84 1 4 3 Multi Branch Selector Unit Flex Series BSF4Q54TVJ 3D122813 ...

Page 92: ...Refrigerant Circuit Piping Diagrams SiUS371901EB 85 Part 2 Refrigerant Circuit BSF6Q54TVJ 3D125655 ...

Page 93: ...SiUS371901EB Refrigerant Circuit Piping Diagrams Part 2 Refrigerant Circuit 86 BSF8Q54TVJ 3D125656 ...

Page 94: ...er gas upper R8T Solenoid valve Oil separator oil return Y1S Solenoid valve Hot gas bypass Y2S Solenoid valve Liquid shutoff Y3S High pressure sensor S1NPH Section W W Thermistor Heat exchanger gas lower R9T Thermistor Suction pipe R10T Inverter fan M2F Thermistor Outdoor air R1T Four way valve HP LP gas pipe Y4S High pressure switch S1PH Electronic expansion valve Heat exchanger upper Y1E Thermis...

Page 95: ... A detail Thermistor Receiver gas purge R13T Electronic expansion valve Receiver gas purge Y7E Thermistor Heat exchanger liquid upper R4T Thermistor Heat exchanger liquid lower R5T Thermistor Subcooling gas R6T Part B detail Electronic expansion valve Subcooling injection Y4E Thermistor Subcooling liquid R7T Thermistor Receiver inlet R3T Thermistor Subcooling injection R16T ...

Page 96: ...noid valve Oil separator oil return Y1S Solenoid valve Hot gas bypass Y2S Solenoid valve Liquid shutoff Y3S High pressure sensor S1NPH Section W W Thermistor Heat exchanger gas lower R9T Thermistor Suction pipe R10T 1 2 3 4 Inverter fan M2F Thermistor Outdoor air R1T Four way valve HP LP gas pipe Y4S High pressure switch S1PH Electronic expansion valve Heat exchanger upper Y1E Thermistor Deicer R1...

Page 97: ...A detail Thermistor Receiver gas purge R13T Electronic expansion valve Receiver gas purge Y7E Thermistor Heat exchanger liquid upper R4T Thermistor Heat exchanger liquid lower R5T Thermistor Subcooling gas R6T Part B detail Electronic expansion valve Subcooling injection Y4E Thermistor Subcooling liquid R7T Thermistor Receiver inlet R3T Thermistor Subcooling injection R16T ...

Page 98: ...xchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL OFF Fan OFF Cooling Unit Double pipe heat exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Filter Filter Filter Filter Thermostat OFF Cooling Unit ON Fan ON Double pipe heat exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve...

Page 99: ...alve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Double pipe heat exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Double pipe heat exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Filter Filter Filter Filter Filter Filter Filter Filter Indoor Unit Thermostat OFF OFF...

Page 100: ... exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Double pipe heat exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Double pipe heat exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Filter Filter Filter Filter Filter Filter Filter Filt...

Page 101: ...exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Double pipe heat exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Double pipe heat exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Filter Filter Filter Filter Filter Filter Filter Filte...

Page 102: ... Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Double pipe heat exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Double pipe heat exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Filter Filter Filter Filter Filter Filter Filter Filter Indoor ...

Page 103: ...er Double pipe heat exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Double pipe heat exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Double pipe heat exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVH Electronic Expansion Valve EVL Filter Filter Filter Filter Filter...

Page 104: ...H71W 113 3 3 When Wireless Remote Controller is Used Together 115 4 Address Setting for Wireless Remote Controller 116 5 Centralized Control Group No Setting 118 5 1 BRC1E73 118 5 2 BRC1H71W 120 5 3 Wireless Remote Controller 120 5 4 Group No Setting Example 121 6 Service Settings Menu Maintenance Menu 122 6 1 BRC1E73 122 7 Administrator Menu Installer Menu 126 7 1 BRC1H71W 126 Part 3 Remote Contr...

Page 105: ...roller Navigation Madoka FXFQ T BRC1E73 BRC1H71W FXZQ TA BRC082A42W for BYFQ60C3W1W BRC082A42S for BYFQ60C3W1S BRC082A41W for BYFQ60B3W1 FXUQ P FXEQ P FXDQ M BRC4C82 FXSQ TA BRC082A43 FXMQ PB BRC4C82 Fan 2 steps BRC082A43 Fan 3 steps FXMQ M BRC4C82 FXHQ M BRC7E83 FXAQ P BRC7E818 FXLQ M FXNQ M FXTQ TA BRC4C82 CXTQ TA FXMQ MF VAM G ...

Page 106: ...ends to press the buttons on the remote controller damage may result 1 Operation mode selector button Press this button to select the operation mode of your preference Available modes vary with the indoor unit model 2 Fan speed control button Press this button to select the fan speed of your preference Available fan speeds vary with the indoor unit model 3 Menu OK button Used to enter the main men...

Page 107: ... highlight the next items on the right hand side Each screen is scrolled in the right hand direction 7 Left button Used to highlight the next items on the left hand side Each screen is scrolled in the left hand direction 8 On Off button Press this button and system will start Press this button again to stop the system 9 Operation lamp This lamp illuminates solid green during normal operation This ...

Page 108: ...ion mode changeover Fan speed control Menu display Confirmation of each setting On Off Cancel Operation lamp Press the Cancel button for 4 seconds or more Press the Cancel button once Press the Cancel button for 4 seconds or more Press the Cancel button once Maintenance Menu Model Name Operation Hours Indoor Unit Status Outdoor Unit Status Forced Defrost Error Display Swap Unit No Addressed Sensor...

Page 109: ...erating Blinks red Error is occurring Lights up blinks green Bluetooth connecting c LCD Displays the current setpoint and air conditioner operation status d NAVIGATE ADJUST button Navigate right Adjust a setting e SELECT ACTIVATE SET button From the home screen enter the user menu From the user menu enter one of the submenus From their respective submenu activate an operation ventilation mode f NA...

Page 110: ...n Installer menu Bluetooth Setting This screen is a menu for the administrator See the next page for items which can be selected 12 34 A3 01 Unit 00 This screen displays the time and the status of the remote controller and the system If an error occurs the error code is displayed Bluetooth Setting This screen is a menu for the installer See the next page for items which can be selected There are 2...

Page 111: ...rection Airflow direction 1 setting h Depends on current setting Vertical Airflow Airflow direction 2 setting h Depends on current setting Ventilation Mode Ventilation mode setting h Depends on current setting Ventilation Rate Ventilation rate setting h Adjust LED ON LED brightness adjustment when backlight lights up h Adjust LED OFF LED brightness adjustment when backlight lights up dimly h Celsi...

Page 112: ...h Contrast Contrast setting h h Clock Setting Clock setting h h Standard Temp Scale reference temperature setting h h About Administrator information h h Admin Password Administrator password setting h Installer Password Installer password setting h Field Setting Field Setting h R C Setting R C Setting h Address Setting Address Setting h Forced Fan ON Forced Fan ON Setting h Rel Master Control Rel...

Page 113: ... to change the operation mode between cool and heat i Under centralized control Displayed if the system is under the management of a multi zone controller Optional and the operation of the system through the remote controller is limited j Fahrenheit Celsius Depending on the setting Fahrenheit Celsius display can be selected k Ventilation operation Air Purify Displayed when a Heat Reclaim Ventilato...

Page 114: ...e controller setting Text mode Auto Cool 73 Room Icon mode 73 F 74 Text mode Scale screen Auto Cool Cool Warm Icon mode Scale screen When in the scale screen the setpoint can be changed in the range of 3 C F of the reference temperature The reference temperature can be changed from the smartphone application or the remote controller from the administrator menu ...

Page 115: ...isplay the information screen Home screen Auto Cool 73 Room 73 F 74 Text mode Icon mode Press and hold on the Home screen for 5 seconds Information screen 12 34 The screen switches to the Information screen How to exit the information screen Information screen 12 34 Press or there is no button operation for about 10 seconds the screen returns to the home screen ...

Page 116: ... controller during this time Not Displayed The remote controller has master control Able to select heating cooling operation Backup Indicates that backup operation is being carried out Energy savings Indicates that the system s energy consumption is being limited and that it is running with restricted capacity Individual airflow direction Indicates that the individual airflow direction setting is ...

Page 117: ...op The display shows the set fan speed When the INSPECTION TEST button is pressed the display shows the system mode is in 13 14 15 16 17 TIMER RESERVE CANCEL BUTTON AIRFLOW DIRECTION ADJUST BUTTON OPERATION MODE SELECTOR BUTTON FILTER SIGN RESET BUTTON INSPECTION TEST BUTTON Press this button to select operation mode This button is used only by qualified service persons for maintenance purposes 11...

Page 118: ...hange a remote controller from Main to Sub proceed as follows 3 1 1 Field Settings The designation of the main and sub remote controllers can be swapped Note that this change requires turning the power OFF and then ON again Situation Setting Select Switch Main Sub Controller and press Menu OK button Service settings menu is displayed Item 2 is displayed Basic screen is displayed Press and hold the...

Page 119: ... You may change the Main Sub setting of the remote controller while Checking the connection Please stand by is displayed by pressing and holding the Mode Selector button for 4 seconds or longer 1 It is not possible to change the Main Sub setting from Main to Sub when only one remote controller is connected 2 When 2 remote controllers are being used it is not possible to change the setting from Mai...

Page 120: ...Auto operation mode Filter auto clean Setback temperature setpoints Draft prevention If a sub controller does not display the home screen 2 minutes after its designation turn off the power Individual airflow direction a b c d 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 M...

Page 121: ...lanation 1 main 2 sub Home screen 2 When the U5 error code appears press and hold until 2 appears on the screen When the U8 error code appears press and hold until 1 appears on the screen Result A controller displaying 1 is set as main and a controller displaying 2 is set as sub INFORMATION If sub remote controller is not set at power on in the case of one indoor unit controlled by two remote cont...

Page 122: ...th 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 Main Sub Main Sub Main Sub switch SS1 S M S M Transmitter assembly 1 2 3 M S SS2 SS1 The side painted black indicates the switch knob position ...

Page 123: ...ble below The address for the wireless remote controller is set to 1 at the factory To change the setting proceed as follows 1 Press FILTER SIGN RESET button and INSPECTION TEST button at the same time for 4 seconds to enter field setting mode SETTING is indicated on the display 2 Press FAN button and select A or b Each time the button is pressed the display switches between A and b 3 Press UP but...

Page 124: ...tings A b Remote Controller Indoor Unit Multiple setting Display on remote controller Behavior to the remote controller operation when the functions are restricted as by an external control Other than the left A Standard factory set All items displayed Accepts the functions except restricted Sounds one long beep or three short beeps There may be a difference from the indoor unit status with remote...

Page 125: ... by indoor unit When initializing Group Address Select Group Address and then press the Menu OK button Press the Cancel button once Press the Cancel button once Service settings menu is displayed Item 2 is displayed Item 2 is displayed Item 2 is displayed Basic screen is displayed Press the Cancel button once Select the desired Group Address using the Up Down buttons and then press the Menu OK but...

Page 126: ...ith the operation manual for maintenance Group Address Group Select Group Address and then press the Menu OK button Select Group Address Group and then press the Menu OK button Select the desired Group Address using the Up Down buttons and then press the Menu OK button Service settings menu is displayed Item 2 is displayed Item 2 is displayed Item 2 is displayed Basic screen is displayed Press and...

Page 127: ...rs by pressing RESERVE button 5 Press INSPECTION TEST button and return to the normal mode 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 The group and unit address can be set and released NOTICE Don t forget to r...

Page 128: ...ere displayed once for about 1 minute on the liquid crystal display This is not an operative fault Central Remote Controller F1 F2 F1 F2 F1 F2 F1 F2 P1 P2 RC RC RC RC RC F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 No Remote Controller 1 03 1 00 1 01 Main Sub 1 02 1 04 Indoor Outdoor Outdoor Outdoor F1 F2 F1 F2 Indoor Outdoor Outdoor Outdoor Group Control by ...

Page 129: ...e Cancel button for 4 seconds or more Press and hold the Cancel button for 4 seconds or more Select the desired item from the Maintenance menu and then press the Menu OK button Maintenance menu is displayed Item 2 is displayed Press the Cancel button Select the desired Unit No using the Up Down buttons The corresponding data will be displayed Select an item from Service settings menu and press Men...

Page 130: ... Set Group Address Unit Unit No Gr Addr Set Indoor unit Airnet Address Unit No Address Set Outdoor unit Airnet Address Unit No Address Set Error History RC Error History Unit No Error Date Time Up to 10 errors received by the remote controller can be displayed Indoor Unit Error History Unit No Error Date Time Up to 5 errors from the indoor unit error record can be displayed Indoor Unit Status Unit...

Page 131: ... Status Unit No Select the unit number you want to check FAN Fan tap 1 Speed Fan speed rpm 2 FLAP Swing fixed EV Degree that electronic expansion valve is open pulse MP Drain pump ON OFF EH Electric heater ON OFF Hu Humidifier ON OFF 3 TBF Anti freezing control ON OFF FLOAT Float switch OPEN CLOSE T1 T2 T1 T2 external input OPEN CLOSE Th1 Suction air thermistor Th2 Heat exchanger liquid pipe therm...

Page 132: ...tat step 1 ON 01 Displays the heat demand that CXTQ TA is currently sending to the gas furnace Displays the fan demand that CXTQ TA is currently sending to the gas furnace Current status of heat pump ON OFF for CXTQ TA HP OFF 00 HP ON 01 Current status of gas combustion heating Displays current heat actual status Current airflow of the fan Displays current airflow CFM Data The corresponding data w...

Page 133: ...SiUS371901EB Administrator Menu Installer Menu Part 3 Remote Controller 126 7 Administrator Menu Installer Menu 7 1 BRC1H71W Refer to page 104 for details ...

Page 134: ...ssor Step Control 137 5 4 Electronic Expansion Valve PI Control 139 5 5 Step Control of Outdoor Fans 140 5 6 Heat Exchanger Control 141 6 Protection Control 142 6 1 High Pressure Protection Control 142 6 2 Low Pressure Protection Control 144 6 3 Discharge Pipe Protection Control 145 6 4 Compressor Body Protection Control 146 6 5 Inverter Protection Control 146 7 Special Control 148 7 1 Pump Down R...

Page 135: ...on Control 173 9 8 List of Swing Flap Operations 175 9 9 Hot Start Control In Heating Operation Only 176 9 10 Louver Control for Preventing Ceiling Dirt 177 9 11 Heater Control Except FXTQ TA Models 178 9 12 Heater Control FXTQ TA Models 179 9 13 Gas Furnace Control CXTQ TA Models 182 9 14 3 Step Thermostat Processing FXTQ TA Models 183 9 15 Fan Control Heater Residual FXTQ TA Models 184 9 16 Inte...

Page 136: ...Crankcase heater control Startup control include pressure equalization before startup 1 Startup control in cooling 2 Startup control in heating Basic control 1 Normal control 2 Compressor PI control 3 Operation priority and rotation of compressors 4 Compressor step control 5 Electronic expansion valve PI control 6 Step control of outdoor fans 7 Heat exchanger control Protection control 1 High pres...

Page 137: ...nsion valve Y1E Normal opening degree 0 pulse 0 pulse Normal opening degree 192 pulse 192 pulse Branch Selector unit Branch Selector unit actuator Normal cooling Normal simultaneous cooling heating Normal heating Cooling Cooling Heating Heating Electronic expansion valve EVSC Y1E Thermostat ON 0 pulse 0 pulse Subcooling degree control 0 pulse Non operating 0 pulse 0 pulse 0 pulse 0 pulse Thermosta...

Page 138: ...aches certain number Refer to Error Codes and Descriptions on page 277 of the troubleshooting for the items to determine the error 2 2 When System is in Stop Mode The four way valves retain the condition ON when heating operation is stopped 2 3 Slave Unit Stops during Master Unit Operation When slave unit is stopped because of low demand conditions for this units are set same as system stop System...

Page 139: ...rant system In addition the outdoor fan carry out the residual operation for a while to accelerate pressure equalizing and to suppress melting of the refrigerant to the evaporator 3 2 Crankcase Heater Control In order to prevent the refrigerant from melting in the compressor oil in the stopped mode this mode is used to control the crankcase heater Crankcase heater OFF Crankcase heater ON Discharge...

Page 140: ...e slave units simultaneously to position the four way valve 4 1 Startup Control in Cooling Refer to page 140 for Step X DSH Discharge pipe superheating degree Pc High pressure sensor detection value Pe Low pressure sensor detection value Ta Outdoor air temperature 0 Hz 0 pulse 3 000 pulse fully open Step 15 Pc Pe 0 42 MPa 60 9 psi DSH 10 C 18 F Pc Pe 0 32 MPa 46 4 psi 20 rps or more OR Ta 20 C OFF...

Page 141: ...sor detection value 0 Hz 10 rps 10 sec A B C D E 0 pulse Step 4 Step 8 OR PI control Compressor M1C Electronic expansion valve main Y1E Inverter fan M1F M2F Frequency step up 5 sec interval Initial opening Pc Pe 0 42 MPa 60 9 psi DSH 12 C 21 6 F Pc Pe 0 32 MPa 46 4 psi 20 rps or more Pc Pe 0 17 MPa 24 7 psi REYQ72 120XA 19 24 29 38 57 Frequency rps REYQ144 168XA 16 4 16 4 18 24 36 A B C D E ...

Page 142: ...ischarge pipe protection Electric expansion valve Subcooling injection Y4E Compressor injection control Compressor injection control Compressor injection control Electronic expansion valve Refrigerant cooling Y5E Cooling refrigerant control Cooling refrigerant control Cooling refrigerant control Electronic expansion valve Receiver gas purge Y7E 0 pulse Gas purge control Gas purge control Solenoid ...

Page 143: ...TeS Outdoor air temperature in Celsius C Outdoor air temperature in Fahrenheit F Low pressure equivalent saturation temperature Target temperature of Te Varies depending on Te setting operating frequency etc L M H A 1 factory setting 3 C 37 4 F 6 C 42 8 F 7 C 44 6 F 8 C 46 4 F 9 C 48 2 F 10 C 50 F 11 C 51 8 F 28 75 Ta C 0 65 C 104 55 Ta F 0 65 F Heating Controls compressor capacity to adjust Tc to...

Page 144: ... 19 8 77 45 8 137 105 6 18 20 1 78 46 5 138 107 1 19 20 5 79 47 1 139 108 4 20 20 7 80 47 8 140 110 1 21 21 0 81 48 5 141 111 7 22 21 3 82 49 1 142 113 2 23 21 6 83 49 8 143 114 8 24 21 9 84 50 5 144 116 4 25 22 2 85 51 1 145 118 0 26 22 5 86 52 0 146 119 7 27 22 9 87 52 7 147 121 4 28 23 2 88 53 4 148 123 1 29 23 5 89 54 2 149 124 8 30 23 8 90 54 9 150 126 5 31 24 2 91 55 7 151 128 3 32 24 5 92 5...

Page 145: ...2 74 5 23 18 6 83 32 8 143 75 6 24 18 7 84 33 3 144 76 6 25 18 8 85 33 7 145 77 7 26 18 9 86 34 2 146 78 8 27 19 0 87 34 7 147 79 9 28 19 1 88 35 2 148 81 0 29 19 2 89 35 7 149 82 2 30 19 3 90 36 2 150 83 3 31 19 4 91 36 7 151 84 5 32 19 5 92 37 0 152 85 7 33 19 6 93 37 7 153 86 9 34 19 7 94 38 2 154 88 1 35 19 8 95 38 8 155 89 3 36 19 9 96 39 3 156 90 6 37 20 0 97 39 9 157 91 8 38 20 1 98 40 4 15...

Page 146: ...ooling heat exchanger this function is used to exert PI control on the electronic expansion valve Y2E Y5E or Y3E so that the evaporator side gas pipe superheating degree SH will become constant Main electronic expansion valve EVM control SC Tc Tf SC Tc Tf Condenser outlet subcooling degree High pressure equivalent saturated temperature Liquid pipe temperature detected by heat exchanger liquid pipe...

Page 147: ...7 317 287 317 21 300 330 300 330 22 314 344 314 344 23 320 350 320 350 24 332 362 332 362 25 345 375 345 375 26 358 388 358 388 27 372 402 372 402 28 386 416 386 416 29 401 431 401 431 30 417 447 417 447 31 434 464 434 464 32 451 481 451 481 33 470 500 470 500 34 489 519 489 519 35 509 539 509 539 36 531 561 531 561 37 553 583 553 583 38 577 607 577 607 39 601 631 601 631 40 627 657 627 657 41 655...

Page 148: ...r side Lower side Upper side Condenser Condenser Condenser Condenser Lower side Upper side Outdoor unit Lower side Upper side Lower side Upper side Condenser Condenser Condenser Lower side Upper side Outdoor unit Lower side Upper side Lower side Upper side Condenser Condenser CL decrease HL increase CL increase HL decrease Lower side Upper side Outdoor unit Lower side Upper side Lower side Upper s...

Page 149: ... step down 1 step up 2 step down After 10 seconds After 15 seconds After 15 seconds After 10 seconds Pc 3 57 MPa 518 psi Pc 3 70 MPa 537 psi Pc 3 14 MPa 455 psi Pc 3 45 MPa 500 psi Pc 3 67 MPa 532 psi Pc 3 62 MPa 525 psi Pc 3 57 MPa 518 psi Compressor step 1 After 15 seconds Pc 3 33 MPa 483 psi After 10 seconds Upper limit compressor step max Max Step Pc 3 72 MPa 540 psi Pc High pressure sensor de...

Page 150: ... 72 MPa 540 psi Normal control 9 step down All units Compressor step 1 3 step up Current step maintained High pressure standby 2 times within 40 minutes Pc High pressure sensor detection value for master unit Abnormal stop E3 is displayed Pc 3 31 MPa 480 psi After 10 seconds After 10 seconds After 15 seconds High pressure switch 4 0 MPa 580 psi is activated ...

Page 151: ...op E4 is displayed Low pressure standby 3 times within 60 minutes Low pressure standby 4 times within 60 minutes Normal control 9 step down 9 step up 3 step up 21 step down After 10 seconds After 15 seconds After 15 seconds After 10 seconds Pe 0 10 MPa 14 5 psi Pe 0 07 MPa 10 2 psi Pe 0 15 MPa 21 8 psi Pe 0 11 MPa 16 0 psi Pe 0 10 MPa 14 5 psi Pe 0 08 MPa 11 6 psi Compressor step 1 After 10 second...

Page 152: ... Compressor step 1 After 20 seconds HTdi 135 C 275 F HTdi 120 C 248 F continues for 10 minutes Ti 120 C 248 F continues for 5 seconds Ti 115 C 239 F continues for 10 minutes OR HTdi Value of compressor discharge pipe temperature Tdi compensated with outdoor air temperature Ti Compressor body temperature A Maximum of HTdi and Ti X C Y F REYQ72 120XA 115 C 239 F constant REYQ144 168XA Temperature de...

Page 153: ...ed for each compressor Normal control Compressor body temperature standby Reduce compressor capacity step Compressor body temperature 108 C 226 4 F Compressor body temperature 135 C 275 F When occurring 3 times within 100 minutes the error code F3 is output Sub code 20 21 22 Inverter overcurrent protection control Condition REYQ72 120XATJU A REYQ72 120XAYDU A REYQ72 120XAYCU A REYQ144 168XATJU A R...

Page 154: ...C 197 6 F less than 93 C 199 4 F less than 87 C 188 6 F C more than 100 C 212 F more than 100 C 212 F more than 95 C 203 F Normal operation Fin temperature standby Reduce compressor capacity When occurring 4 times within 60 minutes the error code L4 is output A B C Condition REYQ144 168XATJU A REYQ144 168XAYDU A REYQ144 168XAYCU A A more than 70 C 158 F more than 70 C 158 F more than 90 C 194 F B ...

Page 155: ...verter fan M1F M2F For heat exchanger mode For heat exchanger mode Electronic expansion valve Heat exchanger upper Y1E Same as normal control Same as normal control Electronic expansion valve Heat exchanger lower Y3E Electronic expansion valve Subcooling heat exchanger Y2E 0 pulse 0 pulse Electric expansion valve Subcooling injection Y4E 760 pulse 760 pulse Electronic expansion valve Refrigerant c...

Page 156: ...ation of the compressor even if the reference value is not met Starting conditions Part name Electric symbol Oil return operation Compressor M1C Constant low pressure control Inverter fan M1F M2F For heat exchanger mode Electronic expansion valve Heat exchanger upper Y1E Same as normal control Electronic expansion valve Heat exchanger lower Y3E Electronic expansion valve Subcooling heat exchanger ...

Page 157: ...ormal control Non operating unit 224 pulse Thermostat OFF unit Forced thermostat ON PI control Branch Selector unit actuator Normal cooling Electronic expansion valve EVSC Y1E Thermostat ON 0 pulse Non operating 0 pulse Thermostat OFF 0 pulse Electronic expansion valve EVH Y2E Thermostat ON 6 000 pulse Non operating 6 000 pulse Thermostat OFF 6 000 pulse Electronic expansion valve EVL Y3E Thermost...

Page 158: ...ger upper Y6S Hold Solenoid valve Accumulator oil return Y7S Same as normal control Ending condition A lapse of 8 minutes while the frequency is more than that of oil return operation Indoor unit actuator Cooling Heating Fan Thermostat ON unit Remote controller setting Remote controller setting Non operating unit OFF OFF Thermostat OFF unit Remote controller setting Remote controller setting Elect...

Page 159: ...Hold Four way valve Heat exchanger upper Y6S Hold Solenoid valve Accumulator oil return Y7S ON Ending condition A lapse of 15 minutes Tb 11 C 51 8 F continues for 30 seconds or more OR Indoor unit actuator Defrost operation Fan Thermostat ON unit OFF Non operating unit OFF Thermostat OFF unit OFF Electronic expansion valve Thermostat ON unit Defrost EV opening degree Non operating unit Defrost EV ...

Page 160: ... Example The following diagram shows outdoor unit rotation in combination of 3 outdoor units Master unit slave unit 1 and slave unit 2 in this section are the names for installation They are determined in installation work and not changed thereafter These names are different from master unit and slave unit for control The outdoor unit connected the control wires F1 and F2 for the indoor unit shoul...

Page 161: ...lectronic expansion valve will fully open and the electronic expansion valve of the indoor unit will open to activate the heating circuit The required switching time is approximately 6 minutes Field settings however can shorten the time from 6 minutes to 4 minutes 1 In cooling operation 2 In equalization 3 To heating mode Y2E Y3E Y1E Liquid pipe Dual pressure gas pipe Suction gas pipe Branch Selec...

Page 162: ...n valve will fully open and the electronic expansion valve of the indoor unit will open to activate the heating circuit The required switching time is approximately 6 minutes Field settings however can shorten the time from 6 minutes to 4 minutes 1 In heating 2 In equalization 3 To cooling Y2E Y3E Y1E Heating Unit Branch Selector unit Indoor unit Dual pressure gas pipe Liquid pipe Suction gas pipe...

Page 163: ...tion or cooling and heating simultaneous operation Using the dual pressure gas pipe as a suction gas pipe 2 Pump down residual operation 3 Pre startup control Switching between the electronic expansion valves of branch selector unit Required switching time 2 to 4 minutes switching control time While switching The compressor stops operating 4 Startup control Switching the dual pressure gas pipe fro...

Page 164: ... Emergency operation with outdoor unit PCB setting 8 2 Demand Operation In order to limit the power consumption the capacity of outdoor unit is forcibly reduced by using Demand 1 Setting or Demand 2 Setting To operate the unit with this mode additional setting of Continuous Demand Setting or external input by external control adaptor for outdoor unit is required Refer to page 242 for the power con...

Page 165: ...SiUS371901EB Other Control Part 4 Functions and Control 158 Outdoor fan operates at step 1 Heating operation is enabled when outdoor air temperature drops below 24 C 75 2 F ...

Page 166: ...p kit MP Drain pump kit ON MP Drain pump kit ON MP Closed Electronic expansion valve Capacity control Electronic expansion valve Closed YE MA OFF EH OFF EH Humidifier OFF Hu Humidifier OFF Hu YE The previous settings of airflow rate wind direction and temperature are displayed Is the RUN indicating lamp blinking Press the RESET RUN STOP push button Electronic expansion valve Thermostat ON operatio...

Page 167: ...F Hu Fan Operating in L mode MF Fan Operating in L mode after it stops for 6 min MF YE Drain pump kit YE MP Swing flap Swing flap Set wind direction Fan MF Operating with set airflow rate YE Closed Program dry display Electronic expansion valve Superheating degree control Electronic expansion valve Closed Electronic expansion valve Drain pump kit OFF after 5 min residual operation Aux electric hea...

Page 168: ...n progress 4 min Is hot starting in progress Is defrost operation in progress Heating Operation A B Thermostat status No No 15 16 Option Option Option Option OFF Humidifier ON OFF Humidifier OFF ON Humidifier ON OFF Humidifier OFF OFF MP Yes Yes No No No No 13 14 13 18 Yes Yes Yes Yes Swing flap Is defrost operation in progress Yes No Yes Swing flap Set wind direction Fan Operating with set airflo...

Page 169: ...ording to fan speed instruction from the remote controller the fan is put into operation in LL mode while in heating operation 13 Wind direction When the heating thermostat turns OFF the wind direction will be set to 100 horizontal 14 Hot start If the condenser inlet temperature exceeds 34 C 93 2 F at the time of starting operation or after the completion of defrost operation or until 3 minutes pa...

Page 170: ...icient heating in heating operation Control target temperature remote controller displayed temperature 2 C 3 6 F The temperature difference for cooling heating mode switching is 5 C 9 F The above also applies to automatic operation Remote controller set temperature Control target temperature Remote controller set temperature Control target temperature 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 2...

Page 171: ... values of the suction air thermistor and the infrared floor sensor It is difficult to use only suction air temperature control for underfoot air conditioning 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 The ...

Page 172: ...n temperature fine adjustment control is carried out using a suction air thermistor or using the remote controller thermistor near the position of the user when the suction temperature is near the set temperature Assuming the set temperature in the figure above is 24 C 75 F and the suction temperature has changed from 18 C 64 F to 30 C 86 F A F This example also assumes there are several other air...

Page 173: ...ature Assuming the set temperature in the figure above is 24 C 75 F and the suction temperature has changed from 18 C 64 F to 28 C 82 F A D This example also assumes there are several other air conditioners and the suction temperature changes even when the thermostat sensor is off Suction air thermistor is used for temperatures from 18 C 64 F to 25 C 77 F A C Remote controller thermistor is used f...

Page 174: ...f the field setting 14 24 5 is set to 02 Tro will be the same as the cooling set temperature ΔT Room temperature Remote controller set temperature Tro Room temperature at the start of dry operation Tr Room temperature 1 The thermistor for room temperature detection depends on the field setting 10 20 2 Thermostat OFF Normal operation Thermostat ON ΔT 1 0 C 1 8 F ΔT 1 0 C 1 8 F Thermostat OFF Normal...

Page 175: ...ate outside of use range To avoid the above condition a limit based on the suction air temperature is set for the use range of the temperature around people Cooling operation When the floor temperature is lower than suction air temperature R1T R1T will be treated as the control target temperature for operation When the temperature around people is 15 C 59 F or lower R1T will be treated as the cont...

Page 176: ...ode Control temp Differential value set to 1 C 1 8 F Set heating temp Set cooling temp Heating mode Control temp Differential value set to 2 C 3 6 F Heating mode Control temp Differential value set to 3 C 5 4 F Heating mode Cooling mode Control temp Set heating temp Set cooling temp Set heating temp Set cooling temp Differential value set to 4 C 7 2 F Heating mode Cooling mode Control temp Differe...

Page 177: ...eously After the thermostat turns OFF the drain pump continues to operate for another 5 minutes Float switch Error display Thermostat running OFF OFF ON ON ON OFF Drain pump ON OFF 5 min OFF OFF ON ON ON OFF ON OFF 5 min 5 min 5 sec 5 sec Float switch Error display Thermostat running Drain pump A3 1 2 4 3 1 If the float switch turns ON again during the residual operation of the drain pump cooling ...

Page 178: ... the drain pump turns ON simultaneously 1 If the float switch continues to turn OFF and ON 5 times consecutively it is judged as a drain system error and the error code AF is displayed on the remote controller 2 The drain pump continues to turn ON OFF in accordance with the float switch ON OFF even after AF is displayed on the remote controller 3 While the error code AF is displayed if the float s...

Page 179: ...mes lower As ΔT Remote controller set temp Suction air temp becomes smaller SHS becomes higher Subcooling degree control in heating operation This function is used to adjust the opening of the electronic expansion valve so that the high pressure equivalent saturated temperature Tc which is converted from the detected pressure of the high pressure sensor in the outdoor unit and the subcooling degre...

Page 180: ...ure 1 C 30 2 F for total of 40 minutes or Liquid pipe temperature 5 C 23 F for total of 10 minutes Condition for cancelling Liquid pipe temperature 7 C 44 6 F for 10 minutes continuously Concept of freeze up prevention control System avoids freeze up For comfort system avoids unnecessary thermostat ON OFF For ensuring compressor reliability system avoids unnecessary compressor ON OFF When freeze u...

Page 181: ...or total of 15 minutes or Liquid pipe temperature 0 C 32 F for 1 minute continuously During freeze up prevention control the airflow rate is fixed to LL The cancelling conditions are same as the standard 0ºC 32 F 7ºC 44 6 F 10 min 1 min 1ºC 33 8 F t1 t2 t3 t4 7ºC 44 6 F 10 min OR t 15 minutes Freeze up prevention control Forced OFF by thermostat Freeze up prevention control Forced OFF by thermosta...

Page 182: ...mostat OFF mode for prevention of cold air Swing LL Horizontal Horizontal Horizontal Horizontal Airflow direction set LL Horizontal Horizontal Horizontal Horizontal Stop Swing OFF Horizontal Horizontal Horizontal Totally closed Airflow direction set OFF Horizontal Horizontal Horizontal Totally closed Cooling Thermostat ON in program dry Swing L 1 Swing Swing Swing Swing Airflow direction set L 1 S...

Page 183: ... is OFF before initiating the hot start OFF Hot start control Hot start in progress Normal control Normal control H L remote controller setting LL OFF Remote controller setting P0 Horizontal Fan Louver Ending condition Lapse of 3 minutes TH2 34 C 93 2 F Tc 52 C 125 6 F OR Starting condition Defrost ending Oil return ending Thermostat ON OR The fan is not OFF before initiating the hot start LL The ...

Page 184: ...and FXEQ P models Factory setting FXFQ T models draft prevention position FXZQ TA FXEQ P models standard position P0 P1 P2 P4 P3 P0 P1 P2 P4 P3 P0 P0 P1 P2 P4 P4 P2 P1 P0 P4 P4 P3 P2 P1 P0 P3 Existing position Draft prevention position Not for Multi flow type Draft prevention position Standard position Prohibited Prohibited Dirt prevention position P0 P0 P0 P1 P2 P2 P1 P3 P3 P4 P4 P1 P2 P3 P4 Same...

Page 185: ...ucted by converting the heater temperature into the condensing pressure equivalent saturated temperature Tc according to the temperature detection through the high pressure sensor S1NPH of the outdoor unit Fan residual operation While the heater turns OFF in order to prevent the activation of the thermal protector the fan conducts residual operation for a given period of time after the heater turn...

Page 186: ...e electric heater Heating Automatic heating Auxiliary heater enabled 1 Not in heating Automatic heating Auxiliary heater enabled 0 3 Heater not allowed Heater allowed Heater 1 OFF Heater 2 OFF OR OR OR Thermostat OFF Operation OFF Heater 1 OFF Heater 2 OFF Thermostat OFF Thermostat ON Thermostat ON Condition C Condition B Condition B Thermostat OFF H P Heating In operation Heater 1 OFF Heater 2 OF...

Page 187: ... 1 4 OR Not during defrost oil return Fan motor system error Heater ON permission Defrost oil return 0 4 1 High pressure condition 2 Liquid pipe temperature condition 3 Auxiliary heater enabled 4 Heater ON permission Defrost oil return 5 Field setting 11 21 5 Refer to page 205 6 Field setting 11 21 3 Refer to page 204 ON OFF 49 120 2 54 129 2 Tc C F Thermostat ON OFF 46 114 8 49 120 2 TH2 C F Ther...

Page 188: ...n operation Heater 1 ON Heater 2 ON OFF for single heater Fan ON Electric heater capacity setting Setting not available Thermostat step 2 ON Time up Electric heater capacity setting Setting available Not Condition A Not Condition A Condition A OR Condition B Heater backup prohibiting conditions 1 Heating or automatic heating mode Thermostat step 1 ON No fan motor system error Hot water heater 1 ON...

Page 189: ...s furnace combustion heating Detail The airflow rate during gas furnace operation depends on the intensity of combustion heating and therefore may be different from the airflow setting displayed on the remote controller Thermostat ON Thermostat OFF Thermostat OFF Thermostat ON Heat pump operation Hot water heater signal from outdoor unit ON Compressor is suspended OR Hot water heater signal from o...

Page 190: ... 1 OFF Thermostat step 2 OFF Thermostat step 3 OFF Other conditions Perform the processing in the following chart 5 1 Cooling 2 Heating Thermostat step 2 Thermostat step 1 ON OFF ON OFF 2 S 1 4 S 1 A 4 B 4 Controlled temperature Tcon C Set temperature Ts Thermostat step 3 Thermostat step 2 Thermostat step 1 ON OFF ON OFF ON OFF 1 5 1 5 Toff S 1 2 3 Ton S 1 2 3 A 4 B 4 Set temperature Ts Controlled...

Page 191: ...ed OFF from ON OR Heater ON Time up 2 Residual OFF Residual ON Fan 1 ENTRY 90 sec timer starts 1 When the heater is ON the airflow rate of the fan will be whichever is the largest between the CFM dictated by the heater s own capacity or the fan tap CFM determined by other controls 2 Fan residual operation will continue even if the indoor unit is turned off with the remote controller operation butt...

Page 192: ...hermostat ON signal Cooling mode When the thermostat is ON External output ON 2 OR Tcon Ts continues for 1 minute Economizer set time 3 Free cooling only Economizer set time 3 Free cooling only Thermostat ON continues for the economizer set time 3 Air conditioner operation is stopped The remote controller indicates cooling operation The fan tap follows the remote controller Air conditioner operati...

Page 193: ...n the PCB 224 2 3 Operating the BS Buttons and DIP Switches on the PCB 225 2 4 Connecting the PC Configurator to the Outdoor Unit 228 2 5 Monitoring Function and Field Settings 229 2 6 Cool Heat Mode Changeover 252 2 7 Night Time Low Noise Operation and Demand Operation 253 3 Field Settings for Branch Selector Unit 258 3 1 Field Settings for Single Branch Selector Unit 258 3 2 Field Settings for M...

Page 194: ...the case of group total setting 1 Press and hold Cancel button for 4 seconds or more Service settings menu is displayed 2 Select Field Settings in the Service Settings menu and press Menu OK button Field settings screen is displayed 3 Highlight the mode and select desired Mode No by using Up Down button 4 In the case of setting per indoor unit during group control When Mode No such as 20 21 22 23 ...

Page 195: ...reen returns 8 In the case of multiple setting changes repeat 3 to 7 9 After all setting changes are completed press Cancel button twice 10 Backlight goes out and Checking the connection Please standby is displayed for initialization After the initialization the basic screen returns Installation of optional accessories on the indoor unit may require changes to field settings See the manual of the ...

Page 196: ... Text mode Icon mode Mode 20 Unit 00 Enter Return Mode 20 Unit 00 a b Press or button to select Mode No and press a Mode No b Unit No Sub menu screen Text mode Icon mode Mode 20 Unit 00 Enter Return Mode 20 Unit 00 Press or button to scroll the desired Mode No and press button Sub menu screen Mode 20 Unit 00 Mode 20 Unit 00 Enter Return Text mode Icon mode Press or button to select Unit No and pre...

Page 197: ...con mode Press or button to select Enter or and then press button to set the selection Sub menu screen Text mode Icon mode SW 00 Set Cancel 01 SW 00 01 b a Press or button select First Code No and then press button a First Code No b Second Code No Sub menu screen Text mode Icon mode SW 00 01 SW 00 Set Cancel 01 Press or button scroll to the desired First code No and then press button to set the se...

Page 198: ...the setting has been changed the screen may return to the home screen without returning to the installer menu CAUTION settings For more information see the installation manual of the optional accessory of the indoor unit Field settings that are not available for a connected indoor unit are not displayed For details about the specific field settings of each type of indoor unit see the installation ...

Page 199: ... TEST button for 4 seconds during normal mode to enter the field setting mode 2 Press the MODE button to select the desired mode No 3 Press the UP button to select the first code No 4 Press the DOWN button to select the second code No 5 Press the RESERVE button to confirm the setting 6 Press the INSPECTION TEST button to return to the normal mode RESERVE button INSPECTION TEST button Mode No Field...

Page 200: ...mperature setting 4 During group control when setting by each indoor unit mode No 20 22 and 23 have been selected press the BS8 4 button unit No and select the indoor unit No to be set This operation is unnecessary when setting by group 5 Press the BS9 button 5 set A and select first code No 6 Press the BS10 button 6 set B and select second code No 7 Press the BS7 button 7 set cancel once and the ...

Page 201: ...iary electric heater ON OFF temperature Ton Toff 2 Auxiliary electric heater OFF temperature Toff 3 Setting the airflow rate when heating Standard Slightly increased Increased 204 3 Electric heater setting Refer to page on the right for details 205 5 Electric heater capacity setting Refer to page on the right for details 205 6 Setting the rate of human detection High sensitivity Low sensitivity St...

Page 202: ...211 6 External static pressure settings Refer to page on the right for details 212 14 24 4 Optional kit setting UV lamp humidifier economizer Refer to page on the right for details 213 5 Residential dry Set temperature room temperature Set temperature same as cooling set temperature 213 9 Mold proof operation setting Standard For high humidity areas 213 11 Gas furnace test mode OFF Low heat High h...

Page 203: ...erature h h 2 Auxiliary electric heater OFF temperature h h h h 3 Setting the airflow rate when heating h h h h 3 Electric heater setting 5 Electric heater capacity setting 6 Setting the rate of human detection h h h 7 Automatic airflow adjustment h h 1 8 Compensating the temperature around people h h h 9 Compensating the floor temperature h h h 12 22 0 Optional output switching h h h h h h h 1 Ex...

Page 204: ... heating thermostat is OFF h h h h h h h 2 Setting of direct duct connection h h h h 3 Interlocked operation between humidifier and drain pump h h h h h h h 5 Individual setting of ventilation h h h h h h h 1b 4 Display of error codes on the remote controller h h h h h h h 1c 0 Room temperature display h h h h h h h 1 Thermistor sensor for auto changeover and setback control by the remote controll...

Page 205: ...airflow rate when heating 3 Electric heater setting h 5 Electric heater capacity setting h 6 Setting the rate of human detection 7 Automatic airflow adjustment 8 Compensating the temperature around people 9 Compensating the floor temperature 12 22 0 Optional output switching h h h h h h h 1 External ON OFF input h h h h h h h 2 Thermostat switching h h h h h h h 3 Airflow setting when heating ther...

Page 206: ...ual setting of ventilation h h h h h h h 1b 4 Display of error codes on the remote controller h h h h h h h 1c 0 Room temperature display h h h h h h h 1 Thermistor sensor for auto changeover and setback control by the remote controller h h h h h h h 3 Access permission level setting h h h h h h h 1e 2 Setback availability h h h h h h h 14 Setting restricted permitted of airflow block Field settin...

Page 207: ...n the Second Code No is set to 03 room temperature is controlled by the remote controller thermistor Factory setting Setting 10 20 1 01 Long life filter 02 Ultra long life filter Filter contamination heavy light 10 20 0 Light 01 Heavy 02 Light 01 Heavy 02 Model FXFQ T 2 500 hrs 1 250 hrs 10 000 hrs 5 000 hrs FXZQ TA FXUQ P FXEQ P FXDQ M FXSQ TA FXMQ PB FXMQ M FXHQ M FXLQ M FXNQ M FXAQ P 200 hrs 10...

Page 208: ... 8 91 4 95 98 6 F F 57 2 60 8 64 4 68 71 6 75 2 78 8 82 4 86 89 6 93 2 In cooling In heating Suction air temperature Suction air temperature Suction air thermistor Suction air thermistor Suction air thermistor Suction air thermistor Suction air thermistor Suction air thermistor Suction air thermistor Suction air thermistor Remote controller thermistor Remote controller thermistor Remote controller...

Page 209: ...oup connection and 10 20 2 has priority for individual connection 1 4 5 Time for Absence Area Detection For units with an infrared presence floor sensor only By selecting the energy saving operation mode in the absence the target temperature is shifted to the energy saving end by 1 C 1 8 F maximum 2 C 3 6 F after the state of absence continues for a certain period of time Absent time defined for d...

Page 210: ...ection Cooling at 28 C 82 4 F Heating at 20 C 68 F State of absence 30 60 60 120 Elapsed time of absence min The values in parentheses represent the time when Second code No is 02 Set temperature Toff S 1 Ton S 1 Thermostat OFF Thermostat ON FXFQ T FXMQ PB Factory setting Mode No First Code No Symbol Second Code No 01 02 03 04 05 06 11 21 1 Ton 4 C 7 2 F 3 5 C 6 3 F 3 C 5 4 F 2 5 C 4 5 F 2 C 3 6 F...

Page 211: ...C 7 2 F 3 5 C 6 3 F 3 C 5 4 F 2 5 C 4 5 F 2 C 3 6 F 1 5 C 2 7 F Toff 06 0 5 C 0 9 F h h h h h h 05 0 C 0 F h h h h h 04 0 5 C 0 9 F h h h h 03 1 C 1 8 F h h h 02 1 5 C 2 7 F h h 01 2 C 3 6 F h h Available Not available CXTQ TA Factory setting Mode No First Code No Symbol Second Code No 01 02 03 04 05 06 07 1 11 21 1 Ton 4 C 7 2 F 3 5 C 6 3 F 3 C 5 4 F 2 5 C 4 5 F 2 C 3 6 F 1 5 C 2 7 F 100 C 148 F ...

Page 212: ...c heater with heat pump allowed Allowed Factory setting Model Mode No First Code No Second Code No 01 02 03 04 05 06 07 08 09 10 Heater kW No heater kit 3 5 6 8 10 15 19 20 25 FXTQ09TAVJUA 11 21 5 h h h FXTQ09TAVJUD h h h FXTQ12TAVJUA h h h h FXTQ12TAVJUD h h h h FXTQ18TAVJUA h h h h h h FXTQ18TAVJUD h h h h h h FXTQ24TAVJUA h h h h h h FXTQ24TAVJUD h h h h h h FXTQ30TAVJUA h h h h h h FXTQ30TAVJU...

Page 213: ...fan When you want to change the airflow rate adjust it by pressing the airflow rate control button to select High Middle or Low 3 Make settings to adjust the airflow rate automatically After setting the operation mode to fan enter the field setting mode while operation is stopped and then select the Mode No 11 21 set the First Code No to 7 and the Second Code No to 03 4 After setting return to the...

Page 214: ...n the floor temperature the Second code No 04 The infrared presence floor sensor can be disabled by selecting Suction air temperature only the Second code No 01 Factory setting 1 4 13 Compensating the Floor Temperature For units with an infrared presence floor sensor only Offset the detected value of the infrared floor sensor with a certain temperature This setting should be used to have the actua...

Page 215: ...or unit thermostat ON OFF signal is provided 02 03 Output linked with Start Stop of remote controller is provided 04 In case of Error Display appears on the remote controller output is provided 05 06 07 Only for FXMQ PB Economizer field supply ON OFF signal is provided Mode No First Code No Second Code No Contents 12 22 1 01 ON Forced stop prohibition of using the remote controller OFF Permission ...

Page 216: ...t after Power Failure Factory setting When the Auto Restart after Power Failure setting is turned OFF all the units will remain OFF after power failure or after the main power supply is restored When this setting is turned ON factory setting the units that were operating before the power failure will automatically restart operation after power failure or after the main power supply is restored Due...

Page 217: ...XUQ18 24P Factory setting Mode No First Code No Second Code No Contents Ceiling height 4 way Outlets 3 way Outlets 2 way Outlets 13 23 0 01 Standard Lower than 2 7 m 8 3 4 ft Lower than 3 0 m 10 ft Lower than 3 5 m 11 1 2 ft 02 High Ceiling 1 Lower than 3 0 m 10 ft Lower than 3 3 m 10 3 4 ft Lower than 3 8 m 12 1 2 ft 03 Higher Ceiling 2 Lower than 3 5 m 11 1 2 ft Lower than 3 5 m 11 1 2 ft FXFQ30...

Page 218: ...1 4 24 Setting of Airflow Direction Adjustment Range Make the following airflow direction setting according to the respective purpose Factory setting 1 4 25 Setting of Static Pressure Selection for FXDQ M models Factory setting FXHQ M FXAQ P Factory setting Mode No First Code No Second Code No Ceiling height 13 23 0 01 Standard 02 Slight increase 03 Normal increase Mode No First Code No Second Cod...

Page 219: ...g 1 FXSQ18 48TA cannot be set to 30 40 Pa 0 12 0 16 inWG 2 FXSQ54TA cannot be set to 30 40 Pa 0 12 0 16 inWG or 150 Pa 0 60 inWG FXMQ PB models Factory setting Mode No First Code No Second Code No Contents 13 23 6 01 30 Pa 0 12 inWG 1 3 02 50 Pa 0 20 inWG 03 60 Pa 0 24 inWG 04 70 Pa 0 28 inWG 05 80 Pa 0 32 inWG 06 90 Pa 0 36 inWG 07 100 Pa 0 40 inWG 08 110 Pa 0 44 inWG 2 09 120 Pa 0 48 inWG 2 10 1...

Page 220: ...mp humidifier fan speed Economizer setting for Mech standby duration minutes 14 24 4 01 Refer to controller 10 02 High 10 03 Refer to controller 20 04 High 20 05 Refer to controller 30 06 High 30 07 Refer to controller 40 08 High 40 09 Refer to controller 50 10 High 50 11 Refer to controller 60 12 High 60 13 Refer to controller Free cooling only 14 High Free cooling only Factory setting Mode No Fi...

Page 221: ...dual operation for one minute after the thermostat is stopped For the purpose of preventing dust on the air filter from falling off Factory setting 1 4 34 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 1 4 35 Individual Setting of Ventilation This ...

Page 222: ...o be shown on the Detailed display screen Factory setting 1 4 38 Thermistor Sensor for Auto Changeover and Setback Control by the Remote Controller For BRCE73 only Select a thermistor to utilize for the cool heat mode automatic changeover and setback functions The sensed temperature will be displayed on the remote controller as the room temperature Factory setting Mode No First Code No Second Code...

Page 223: ...led natural evaporation type humidifier or branch air duct is equipped due to the possibility of dew condensation This setting restricts the airflow block function preventing that the airflow block is inadvertently set to ON Ensure that Airflow block restricted is set when using the options listed above Factory setting Button Level 2 Level 3 Selectable Enable Unselectable Disable On Off Selectable...

Page 224: ...ing 2 Stage 1 2 3 4 Dip switch DS1 Heat Airflow Trim 15 10 OFF OFF OFF OFF 12 8 ON OFF OFF OFF 9 6 OFF ON OFF OFF 6 4 ON ON OFF OFF 3 2 OFF OFF ON OFF 0 0 ON OFF ON OFF 3 2 OFF ON ON OFF 6 4 ON ON ON OFF 9 6 OFF OFF OFF ON 12 8 ON OFF OFF ON 15 10 OFF ON OFF ON 0 ON ON OFF ON 0 OFF OFF ON ON 0 ON OFF ON ON 0 OFF ON ON ON 0 ON ON ON ON Dip switch DS2 Heat ON Delay 5 sec OFF OFF OFF 10 sec ON OFF OF...

Page 225: ...SiUS371901EB Field Settings for Indoor Unit Part 5 Field Settings and Test Operation 218 Dip switch DS3 Heating Speed Tap A OFF OFF B ON OFF C OFF ON D ON ON ...

Page 226: ... when you want to turn ON by central remote controller only and turn ON OFF freely by remote controller during set time Individual Used when you want to turn ON OFF by both central remote controller and remote controller Timer operation possible by remote controller Used when you want to turn ON OFF by remote controller during set time and you do not want to start operation by central remote contr...

Page 227: ... timer Unified OFF individual stop by central remote controller or timer stop ON OFF control impossible by remote controller Rejection Example Rejection Example Rejection Example Rejection Acceptance 0 Rejection 10 Acceptance Example Acceptance Example 1 Example Rejection 11 OFF control only possible by remote controller Acceptance Rejection Acceptance 2 Rejection 12 Acceptance Acceptance 3 Reject...

Page 228: ...s 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 For VRV heat recovery system it is alternatively possible to make several commissioning field setting through a personal computer interface for this option EKPCCAB1 is required The installer can prepare the configuration off site on PC and af...

Page 229: ... refer to the table shown on the following page in order to make settings of spare PCB after replacement Enforce a re initialization of communication hold press the RETURN BS3 button for minimum 5 seconds After initialization a test operation is required from outdoor unit hold the SET BS2 button until indication t01 appears 3 BS button BS1 BS3 2 Segment display SEG1 SEG3 4 DIP switch DS1 1 4 DS2 1...

Page 230: ... power disconnected Application model The setting method represents the position of switches REYQ72XA Set DS2 2 to ON REYQ96XA Set DS2 1 and DS2 2 to ON REYQ120XA Set DS2 3 to ON REYQ144XA Set DS2 2 and DS2 3 to ON REYQ168XA Set DS2 1 DS2 2 and DS2 3 to ON 1 2 3 4 1 2 3 4 ON OFF DS1 DS2 1 2 3 4 1 2 3 4 ON OFF DS1 DS2 1 2 3 4 1 2 3 4 ON OFF DS1 DS2 1 2 3 4 1 2 3 4 ON OFF DS1 DS2 1 2 3 4 1 2 3 4 ON ...

Page 231: ... front plate see figure You can see the 3 BS buttons and the 3 seven segment displays and DIP switches Operate the switches and BS buttons with an insulated stick such as a closed ballpoint pen to avoid touching of live parts Location of the segment displays buttons and DIP switches Segment display indications 1 Service window cover 2 Inspection door 3 Main PCB with 3 seven segment displays and 3 ...

Page 232: ...switches which are located on the outdoor unit PCB A1P Turn ON the power supply of the outdoor unit and all indoor units When the communication between indoor units and outdoor unit s is established and normal the segment indication state will be as below default situation when shipped from factory When turning ON the power supply the display blinks ON and OFF First checks of the power supply are ...

Page 233: ...ton Example Checking the content of parameter 1 10 to know how many indoor units are connected to the system Mode 1 Setting 10 Make sure the segment indication is displayed in operational default mode as shipped from factory Press the MODE BS1 button once result segment display Press the SET BS2 button 10 times result segment display Press the RETURN BS3 button once the value which is returned dep...

Page 234: ...ETURN BS3 button again to start operation according to the chosen value Example Checking the content of parameter 2 18 to define the high static pressure setting of the outdoor unit s fan Mode 2 Setting 18 Make sure the segment indication is as during normal operation default situation when shipped from factory Press the MODE BS1 button for over 5 seconds result segment display Press the SET BS2 b...

Page 235: ...door Unit Connection of the optional PC configurator cable to the outdoor unit has to be done on A1P Connect the 999482P3 cable to the 5 pin blue connector X27A Works executed on the outdoor unit are best done under dry weather conditions to avoid water ingress X 2 7 A 1 2 3 2 3 4 5 H JS T X27A A1P 1 PC 2 Cable 999482P3 3 Outdoor unit main PCB ...

Page 236: ... operating under low noise restrictions 1 unit is currently operating under low noise restrictions Night time low noise operation reduces the sound generated by the unit compared to nominal operating conditions Night time low noise operation can be set in mode 2 There are two methods to activate night time low noise operation of the outdoor unit system The first method is to enable an automatic ni...

Page 237: ...ows the 2nd last error code 1 19 shows the 3rd last error code When the latest error codes were reset by accident on an indoor unit user interface they can be checked again through this monitoring settings 1 40 shows the current cooling comfort setting 1 41 shows the current heating comfort setting 1 42 shows the current high pressure sensor value psi 1 43 shows the current low pressure sensor val...

Page 238: ...105 8 F 43 C 109 4 F 46 C 114 8 F 0 1 3 6 12 External low noise setting demand setting Used to receive external low noise or demand signal 2 1 2 Input LNO DE OFF ON 0 1 13 AIRNET address Used to set address of AIRNET 2 1 3 Address 0 63 6 0 3 16 Heat pump lockout 1 Used for heat pump lockout 2 1 6 OFF ON 0 1 18 High ESP setting FAN Fan high static pressure setting 2 1 8 OFF ON 0 1 20 Additional ref...

Page 239: ... 1 2 34 Indoor fan tap setting Indoor fan speed is limited to L tap depending on connection capacity and outdoor air temperature Ta 1 Indoor condition A Temperature difference average of indoor air temperature set temperature is less than 1 5 C 2 7 F 2 Indoor condition B Temperature difference average of indoor air temperature set temperature is 3 C 5 4 F or more 2 3 4 Indoor capacity 130 0 Indoor...

Page 240: ...etting is not applicable to Multi Branch Selector unit standard series 2 4 5 Low ambient cooling not available Low ambient cooling available 0 1 47 Te setting Heat recovery operation Used to make setting of targeted evaporating temperature for heat recovery operation 2 4 7 Auto 6 C 42 8 F 7 C 44 6 F 8 C 46 4 F 9 C 48 2 F 10 C 50 0 F 11 C 51 8 F 0 2 3 4 5 6 7 49 Outdoor 50 m 164 ft above indoor Hei...

Page 241: ...OFF 1 minute ON with high fan speed 0 1 2 90 Indoor unit without power Multi tenant function setting 2 9 0 Invalid Valid No U4 error generation Valid Operating with U4 warning 0 1 2 92 Te target temperature upper limit Used to make setting of targeted evaporating temperature upper limit for cooling and heat recovery operation 2 9 2 L M H 0 1 2 97 Auxiliary heater maximum allowable temperature Auxi...

Page 242: ...S button Setting does not return to factory setting when exit mode 2 To cancel the function change setting manually to factory setting Once function is activated t01 appears To stop current function press once the RETURN BS3 button For detailed description about each setting refer to Details of Setting Mode 2 m2 on page 236 Indication bold means factory setting ...

Page 243: ...peration when outdoor units are connected in multiple system combination Change 2 0 to 0 1 or 2 in function of required functionality 2 2 Low noise demand address Address for low noise demand operation 1 or more systems maximum 10 systems wired by F1F2 OUT D can operate use the LNO Low Noise Operation or and the DE Demand Operation by instruction of field supplied input to optional PCB DTA104A61 6...

Page 244: ...If the system needs to run under night time low noise operation or under power consumption limitation conditions when an external signal is sent to the unit this setting should be changed This setting will only be effective when the optional external control adaptor DTA104A61 62 is installed Default value 0 To activate this function change 2 12 to 1 2 13 AIRNET address When an AIRNET system will b...

Page 245: ...perly Default value 0 To activate this function change 2 21 to 1 To stop the refrigerant recovery vacuuming mode press the RETURN BS3 button If the RETURN BS3 button is not pressed the system will remain in refrigerant recovery vacuuming mode 2 22 Automatic night time low noise setting and level during night time By changing this setting you can activate the automatic night time low noise operatio...

Page 246: ...art time automatic night time low noise operation approximately 1 About 8 00 PM 2 default About 10 00 PM 3 About 12 00 AM This setting is used in conjunction with setting 2 22 2 27 Night time low noise operation stop time Default value 3 Value 2 27 Stop time automatic night time low noise operation approximately 1 About 6 00 AM 2 About 7 00 AM 3 default About 8 00 AM This setting is used in conjun...

Page 247: ...er checker module All 3 phases and neutral are available and Inverter PCB control is active Check if the green LED HAP on the inverter PCBs are blinking normal approx 1 second If LEDs are OFF need to exit the standby mode of the inverter Disconnect and reconnect power supply control PCB or Forced thermostat ON condition or Make shortly set 2 6 1 forced thermostat ON indoor or 2 20 1 manual refrige...

Page 248: ...3D at REYQ144 168XATJU A 208 230 V unbalance maximum 2 terminal L1B L2B L3B at REYQ XAYDU A 460 V unbalance maximum 2 terminal L1B L2B L3B at REYQ XAYCU A 575 V unbalance maximum 2 Check 2 DC voltage connector X6A increase to 260 VDC at REYQ72 120XATJU A C C on inverter PCB from opening hole increase to 260 VDC at REYQ144 168XATJU A connector X5A increase to 600 VDC at REYQ XAYDU A connector X5A i...

Page 249: ...ght time low noise operation start setting Low noise mode instructing Operation sound set with External low noise setting 10 00 PM 8 00 PM 12 00 AM 6 00 AM 7 00 AM 8 00 AM Set with Night time low noise operation start setting Factory setting is 10 00 PM Set with Night time low noise operation end setting Factory setting is 8 00 AM Low noise mode instructing Operation sound set with External low no...

Page 250: ... active 1 Follows 2 30 setting 2 Follows 2 31 setting Change 2 32 0 1 or 2 in function of required limitation 2 34 Indoor fan tap setting Indoor units fan speed limitation related to connection capacity and outdoor air temperature for energy saving Value 2 34 Indoor fan tap setting 0 default Fan speed is limited to L tap when indoor units capacity 130 1 In heating mode fan speed is limited to L ta...

Page 251: ...operation enabled Field setting Set 3 master module is disabled permanently 2 39 Emergency operation Slave 1 To disable permanent compressor operation of Slave 1 unit of a multi outdoor system Default value 0 Compressor operation enabled Field setting Set 3 Slave 1 module is disabled permanently 2 40 Emergency operation Slave 2 To disable permanent compressor operation of Slave 2 unit of a multi o...

Page 252: ... When 2 or 3 modules are installed as a multi outdoor by common refrigerant piping and wiring by terminals Q1Q2 configuration is automatically detected In certain cases the sequence of the slave units need to be set manually in case of AIRNET monitoring Default value 0 Automatic detection Field setting ensure that the modules in a multi are set different status Even some modules in a multi are set...

Page 253: ...to 0 1 2 or 3 in function of required limitation This setting is used in conjunction with setting 2 8 and 2 47 2 82 Heating comfort setting Default value 1 Value 2 82 Heating comfort setting 0 Eco 1 default Mild 2 Quick 3 Powerful Change 2 82 to 0 1 2 or 3 in function of required limitation This setting is used in conjunction with setting 2 9 2 89 Intermittent fan operation Default value 0 Used fo...

Page 254: ... some indoor units are temporarily without power supply Following conditions need to fulfil Maximum equivalent piping length of the farthest indoor less than 120 m 394 ft Index indoor units power simultaneously less than 30 of the nominal outdoor Total capacity is less than 30 of the nominal one of the outdoor unit Operation time is limited to 24 hours period It is recommended to shut down connect...

Page 255: ...mum allowable temperature Auxiliary heater is allowed to energize when the ambient temperature is smaller than the auxiliary heater maximum allowable temperature Auxiliary heater maximum allowable temperature Fahrenheit F Celsius C 0 0 17 7 1 5 15 2 10 12 2 3 15 9 4 4 20 6 6 5 25 3 8 6 30 1 1 7 default 35 1 6 8 40 4 4 9 45 7 2 10 50 10 11 55 12 7 12 60 15 5 13 65 18 3 14 Auxiliary heater always NO...

Page 256: ... Auxiliary heater 0 default OFF 1 ON 2 37 Auxiliary heater setting Type II Value 2 37 Controlling mode 0 default OFF 1 Mode 1 2 Mode 2 3 Mode 3 4 Mode 4 5 Mode 5 6 Mode 6 Type Description Actions Field setting Shorted between Heating thermostat ON Heating thermostat OFF Auxiliary heater Indoor fan Auxiliary heater Indoor fan I Heat pump heating is always locked out 2 16 ON ON ON H L OFF LL II Mode...

Page 257: ...re is smaller than the Heat Pump Lockout Temperature below this setting is only affective when heat pump lockout mode has been set Unit will switch to heat pump lockout Heat pump lockout temperature Fahrenheit F Celsius C 0 default 15 26 1 1 10 23 3 2 5 20 5 3 0 17 7 4 5 15 5 10 12 2 6 15 9 4 7 20 6 6 8 25 3 8 9 30 1 1 10 35 1 6 11 40 4 4 12 45 7 2 13 50 10 14 Forced heat pump lockout ...

Page 258: ...E6 Outdoor fan motor abnormality E7 Electronic expansion valve coil abnormality E9 Position signal abnormality of outdoor fan motor H3 H7 Outdoor air thermistor R1T abnormality H9 Discharge pipe temperature abnormality F3 Wet alarm F4 Branch Selector electronic expansion valve abnormality F9 Discharge pipe thermistor R21T R22T and compressor body thermistor R14T abnormality J3 Accumulator inlet th...

Page 259: ...DS1 A1P ON OFF 1 2 3 4 F1 F2 F1 F2 F1 F2 IN D OUT D BS F1 F2 F1 F2 OUT D BS Cooling Only 1st unit Final unit Final Branch Selector unit In case of the indoor unit connect as the cooling only unit it wire the terminal of the last Branch Selector unit To the indoor unit where the selection of heating and cooling is available F2 B C A F2 F1 F1 F2 F1 Outdoor unit TOIN DUNIT TOOUT DUNIT F1 F2 F1 F2 F1 ...

Page 260: ...o ON If the condition is set to ON when the air conditioning load reaches a high level the low noise operation command will be ignored to put the system into normal operation mode B 1 2 3 4 When night time low noise operation is carried out automatically External control adaptor for outdoor unit is not required While in setting mode 2 select a night time low noise operation level for the item 2 22...

Page 261: ... level set with night time low noise operation setting 6 00 AM 8 00 PM 10 00 PM 12 00 AM 7 00 AM 8 00 AM Set with night time low noise operation end setting Factory setting is 8 00 AM Set with night time low noise operation start setting Factory setting is 10 00 PM Operation sound Rated Level 1 Level 2 Level 3 Time set with night time low noise operation start setting Low noise mode instructing Op...

Page 262: ...1 Operate with power of 70 or less of the rating Short circuit between 1 and C of the terminal block TeS1 Set the item 2 32 to Demand 1 Demand 2 Operate with power of 40 or less of the rating Short circuit between 2 and C Set the item 2 32 to Demand 2 Demand 3 Operate with forced thermostat OFF Short circuit between 3 and C A 1 2 3 When the demand operation is carried out by external contact with ...

Page 263: ...tdoor wiring indicated by dotted line 1 2 3 C Demand Low noise Image of operation in the case of A Power consumption Rated 40 Forced thermostat OFF Fan operation 70 Demand level 1 instructing Power consumption set by Demand 1 level setting Demand level 2 instructing Demand level 3 instructing The power consumption during the demand level 1 instructing can be set with the Demand 1 level setting 70 ...

Page 264: ...display with the Setting No you want 3 Press the RETURN BS3 button once and the present setting content is displayed Press the SET BS2 button several times and match the LED display with the setting content you want 4 Press the RETURN BS3 button two times Returns to 1 5 Press the MODE BS1 button once Returns to the setting mode 1 and H1P turns OFF The power consumption set with Demand 1 level sett...

Page 265: ...o the Branch Selector unit This setting is enabled when the Branch Selector unit power is turned on Be sure to make the setting before turning on the power Always close the control box cover after making the setting 2 Setting when changing the Automatic mode differential in the Cooling Heating Automatic Operation Mode Setting description The Automatic mode differential can be changed within the ra...

Page 266: ...o close the control box cover Setting 1 Setting for branch ports to which no indoor unit is connected ON OFF ON OFF 1 A1P A3P 2 3 4 1 2 DS1 DS2 3 4 A B C D I J K L A B C D I J K L Branch port number Terminal No to which to connect transmission wiring DIP switch Setting Setting for branch ports to which no indoor unit is connected Example 1 Example 1 When not connecting the indoor unit to the A and...

Page 267: ...he power supply 2 Set the DIP switches DS1 DS2 for the corresponding branch ports based on the following table 3 Once work is complete be sure to close the control box cover BSF4Q54TVJ Setting Setting when joining branch ports Example 2 Example 2 When joining the A and B branches ON OFF 1 2 DS2 A1P 3 4 DIP switch setting ON Joined OFF Factory default DIP switch No DS2 A1P DS2 A2P DS2 A3P 1 2 1 2 1...

Page 268: ...iagram attached to the control box cover Note Setting Setting for branch ports to which no indoor unit is connected Example 1 Example 1 When not connecting the indoor unit to the A and B branch ports ON OFF 1 2 DS1 A1P 3 4 DIP switch setting ON Not connected OFF Factory default DIP switch No DS1 A1P DS1 A2P 1 2 3 4 1 2 3 4 BSF4Q54TVJ Target branch port Unit A Unit B Unit C Unit D BSF6Q54TVJ Unit E...

Page 269: ...ctor unit 5 Turn ON the DIP switch of DS1 corresponding to the system to be checked For example when checking the system C Turn ON DS1 3 on A1P 6 If the relevant indoor fan is on it is OK If another indoor fan is on correct the wiring 7 After the check is completed turn OFF the power of the Branch Selector unit 8 Turn OFF all the DS2 3 9 If there is a branch port to which no indoor unit is connect...

Page 270: ...valve Checkpoints Cautions or warnings Are all units securely installed Dangerous for turning over during storm Possible damage to pipe connections Is the ground wire installed according to the applicable local standard Dangerous if electric leakage occurs Are all air inlets and outlets of the indoor and outdoor units unobstructed Poor cooling Poor heating Does the drain flow out smoothly Water le...

Page 271: ...ed if the compressor is running at this time After that the gas furnace will run in tens of seconds Tens of minutes might well be needed to stop compressor if the outdoor unit is particular operation 7 The gas furnace will operate with selected heat stage 8 This test operation will stop automatically after 30 minutes or when the remote controller is turned off Factory setting Heat pump operation i...

Page 272: ...Not Running 302 3 10 Indoor Fan Motor Status Abnormality 303 3 11 Low Indoor Airflow 304 3 12 Swing Flap Motor Abnormality 305 3 13 Power Supply Voltage Abnormality 307 3 14 Blower Motor Stops for Over Under Voltage 308 3 15 Electronic Expansion Valve Coil Abnormality Dust Clogging 309 3 16 Gas Furnace Abnormality 310 3 17 Drain Level above Limit 311 3 18 Capacity Determination Device Abnormality ...

Page 273: ...52 Inverter Radiation Fin Temperature Rise Abnormality 363 3 53 Compressor Instantaneous Overcurrent 366 3 54 Compressor Overcurrent 368 3 55 Compressor Startup Abnormality 370 3 56 Transmission Error between Inverter PCB and Outdoor Unit Main PCB 372 3 57 Power Supply Voltage Imbalance 374 3 58 Reactor Surface Thermistor Abnormality 376 3 59 Inverter Radiation Fin Temperature Abnormality 377 3 60...

Page 274: ...tial Setting for Communication Completes 415 4 Check 416 4 1 High Pressure Check 416 4 2 Low Pressure Check 417 4 3 Superheat Operation Check 419 4 4 Power Transistor Check 421 4 5 Refrigerant Overcharge Check 426 4 6 Refrigerant Shortage Check 427 4 7 Vacuuming and Dehydration Procedure 428 4 8 Thermistor Check 429 4 9 Pressure Sensor Check 432 4 10 Broken Wire Check of the Relay Wires 433 4 11 F...

Page 275: ...tion Open window s or door s Shut it tightly IN COOLING Direct sunlight received Hang curtains or shades on windows IN COOLING Too many persons staying in a room The model must be selected to match the air conditioning load IN COOLING Too many heat sources e g OA equipment located in a room IN DRYING The reason is that the dry operation serves not to reduce the room temperature where possible Chan...

Page 276: ...set to fan operation in cooling or heating operation and the remote controller shows CENTRAL CONTROL Normal operation 8 The airflow rate is not reproduced according to the setting Even pressing the airflow rate setting button makes no changes in the airflow rate In heating operation when the room temperature reaches the set degree the outdoor unit will stop while the indoor unit is brought to fan ...

Page 277: ...dwelling Normal operation Outdoor unit Pitch of operating sounds changes The reason is that the compressor changes the operating frequency Normal operation 12 Dust comes out from the system Dust comes out from the system when it restarts after the stop for an extended period of time Dust which has deposited on the inside of indoor unit is blown out from the system Normal operation 13 Odors come ou...

Page 278: ...t operation while the compressor is during operation or under stop control or right after defrost IN or defrost OUT Wait until the operation becomes stable 2 Operation does not switch from heat pump to gas furnace in spite of low room temperature Operation does not switch from gas furnace to heat pump even though the room temperature is nearing the set temperature This function is performed only w...

Page 279: ... the range P0 P3 8 When using airflow block the airflow block will be routinely lifted become horizontal during heating operation No defect Set louver to horizontal P0 during thermostat OFF 9 Although people are not present the infrared presence sensor detects human presence Check if there are any objects that generate temperature change when moving For example An electric heater with swing functi...

Page 280: ...ing corrective action Operation Status Display Abnormal shutdown The system stops operating The operation lamp green starts to blink The message Error Push Menu button will blink at the bottom of the screen Warning The system continues its operation The operation lamp green remains on The message Warning Push Menu button will blink at the bottom of the screen Press the Menu OK button to check the ...

Page 281: ... of the remote controller starts to beep 3 short beeps Follow all steps below 1 short beep Follow steps 3 and 4 Continue the operation in step 4 until you hear a continuous beep This continuous beep indicates that the error code is confirmed Continuous beep There is no abnormality 3 Press MODE button The left 0 upper digit indication of the error code blinks 4 Press UP button or DOWN button to cha...

Page 282: ...he right 0 lower digit indication of the error code blinks 6 Press UP button or DOWN button and change the error code lower digit until the receiver of the indoor unit generates a continuous beep The lower digit of the code changes as shown below 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 1 short beep...

Page 283: ...rmal mode 3 Press MODE button The upper digit blinks Normal mode 1 Press INSPECTION TEST button to enter inspection mode 7 When MODE button is pressed or no button is pressed for 1 minute equipment returns to normal mode 6 Change the lower digit with UP button or DOWN button If no button is pressed for 1 minute equipment returns to normal mode 5 Press MODE button The lower digit blinks 4 Change th...

Page 284: ...tion error 315 Climate Talk communication error 316 C4 l Heat exchanger liquid pipe thermistor abnormality 317 C5 l Heat exchanger gas pipe thermistor abnormality 317 C6 l Combination error between indoor unit control PCB and fan PCB 318 Blower motor HP mismatch 319 Indoor blower does not have required parameters to function 320 C9 2 l Suction air thermistor abnormality 317 Remote sensor abnormali...

Page 285: ... L9 l Compressor startup abnormality 370 LC l Transmission error between inverter PCB and outdoor unit main PCB 372 P1 l Power supply voltage imbalance 374 P3 l Reactor surface thermistor abnormality 376 P4 1 l Inverter radiation fin temperature abnormality 377 PJ l Field setting after replacing outdoor unit main PCB abnormality or combination of PCB abnormality 379 System U0 1 k Refrigerant short...

Page 286: ...Troubleshooting by Error Code SiUS371901EB 279 Part 6 Service Diagnosis 2 The system may or may not continue operation depending on the conditions ...

Page 287: ... Check for the connections of the connector X12A on the panel PCB and the connectors X18A and X19A on the sensor PCB AH 05 Dust collection sign error when the self cleaning decoration panel is mounted Check for clogging with dust at the dust collection port as well as in the brush unit S shaped pipe and dust box Furthermore check for any stains of the light receiving and emitting parts of the infr...

Page 288: ...kage detection core Master E2 07 Missing of ground leakage detection core Slave 1 E2 08 Missing of ground leakage detection core Slave 2 E3 01 E3 02 Activation of high pressure switch S1PH Master Refer to the E3 flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left E3 03 E3 04 Activation of high pressure switch S1PH Slave 1 E3 05 E3 06 Activation of high pre...

Page 289: ...lave 1 E9 08 Electronic expansion valve coil Y1E error Slave 2 E9 09 Electronic expansion valve coil Y2E error Slave 2 E9 10 Electronic expansion valve coil Y3E error Slave 2 E9 20 Defective electronic expansion valve coil Y1E Master E9 21 Defective electronic expansion valve coil Y1E Slave 1 E9 22 Defective electronic expansion valve coil Y1E Slave 2 E9 23 Defective electronic expansion valve coi...

Page 290: ...gnal abnormality Slave 1 M2F H7 09 Motor position signal abnormality Slave 2 M1F H7 10 Motor position signal abnormality Slave 2 M2F H7 21 Defective fan PCB Master M1F H7 22 Defective fan PCB Master M2F H7 23 Defective fan PCB Slave 1 M1F H7 24 Defective fan PCB Slave 1 M2F H7 25 Defective fan PCB Slave 2 M1F H7 26 Defective fan PCB Slave 2 M2F H9 01 Defective outdoor air thermistor Master Refer t...

Page 291: ... heat exchanger gas lower thermistor R9T Slave 1 J6 13 Defective heat exchanger gas lower thermistor R9T Slave 2 J6 14 Error detection of heat exchanger gas upper thermistor R8T Master J6 15 Error detection of heat exchanger gas upper thermistor R8T Slave 1 J6 16 Error detection of heat exchanger gas upper thermistor R8T Slave 2 J6 17 Error detection of heat exchanger gas lower thermistor R9T Mast...

Page 292: ...9 Error detection of subcooling heat exchanger gas pipe thermistor R6T Slave 1 J9 10 Error detection of subcooling heat exchanger gas pipe thermistor R6T Slave 2 J9 11 Receiver gas purge thermistor R13T Master J9 12 Receiver gas purge thermistor R13T Slave 1 J9 13 Receiver gas purge thermistor R13T Slave 2 JA 06 Defective high pressure sensor S1NPH Open Master Refer to the JA flowchart and make a ...

Page 293: ...e Error code shown to the left L2 02 Momentary power failure during test operation Slave 1 L2 03 Momentary power failure during test operation Slave 2 L2 04 Switch ON the power supply Master L2 05 Switch ON the power supply Slave 1 L2 06 Switch ON the power supply Slave 2 L3 01 Reactor temperature rise Inverter PCB Master Refer to the L3 flowchart and make a diagnosis of the relevant unit based on...

Page 294: ... LC 33 Transmission error Between outdoor units sub PCB Master LC 34 Transmission error Between outdoor units sub PCB Slave 1 LC 35 Transmission error Between outdoor units sub PCB Slave 2 P1 01 Inverter 1 power supply unbalanced voltage Master Refer to the P1 flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left P1 02 Inverter 1 power supply unbalanced volt...

Page 295: ...block is connected to PCB without broken wire or disconnection and reactor wiring is secured If no abnormality is found follow the U2 flowchart Defective capacitor in main circuit P N on the inverter PCB electrolytic capacitor power module may be damaged and short circuited Operation of current limiting relay may be defective or the wiring between the reactor and PCB may be disconnected Measure th...

Page 296: ... left 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 Improper combination of outdoor units UA 21 Connection error UA 23 Connection of excessive Branch Selector units UA 25 Defective connection between outdoor unit and Branch Selector unit ...

Page 297: ...posed Causes Activation of external protection device Improper field setting Defective indoor unit control PCB Troubleshooting ON OFF input from outdoor mode No 12 first code No 1 has been set to external protection device input second code No 03 by remote controller Check the setting state of the external ON OFF input by remote controller External protection device is connected to T1 and T2 of th...

Page 298: ... blown 24 VAC power is not supplied to TH2 and TR2 terminals FXTQ TA or R and C terminals CXTQ TA on the indoor unit PCB Troubleshooting Fuse F1U is blown 24 VAC power is supplied to TH2 and TR2 terminals FXTQ TA or R and C terminals CXTQ TA External protection device is connected to TB4 and TB5 of the indoor unit terminal The external protection device is opened Replace the indoor unit PCB Confir...

Page 299: ...onvolatile memory Maintains memory contents even when the power supply is turned OFF Supposed Causes Defective indoor unit control PCB External factor Noise etc Troubleshooting Turn the power supply OFF then the power ON again Does the system return to normal YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Replace the indoor un...

Page 300: ...connectors or parts may be damaged Replace the float switch S1L Modify the float switch s connection and turn ON again Connect the drain pump and turn ON again Connect either a short circuit connector or float switch and turn ON again YES YES YES YES YES Replace the indoor unit control PCB A1P Loose the connection of connector NO NO NO YES NO NO YES NO NO Provide 208 230 V power supply YES NO Is p...

Page 301: ...ks when the power supply is reset for the indoor unit The voltage of drain pump terminals 2 is in accordance to the criteria 3 within 5 minutes of resetting the power supply A Model 1 Float switch S1L short circuit connector 2 Drain pump M1P connector 3 Drain pump M1P voltage FXFQ T X15A X10A 13 VDC FXZQ TA X15A X102A 13 VDC FXUQ P X15A X25A 13 VDC FXEQ P X15A X25A 13 VDC FXDQ M X8A X25A 220 240 V...

Page 302: ...do not increase Supposed Causes Broken wires in short circuit of or disconnection of connectors from the fan motor harness Defective fan motor Broken wires or defective insulation Abnormal signal output from the fan motor defective circuit Defective indoor unit control PCB Instantaneous disturbance in the power supply voltage Fan motor lock Due to motor or external causes The fan does not rotate d...

Page 303: ... there any foreign matter around the fan YES Is the resistance between the pins more than the judgment criteria Disconnect the connector from the fan motor and then make measurement of resistance between pins Turn OFF the power supply and then wait for a period of 10 minutes Replace the indoor unit control PCB A1P Replace the indoor fan motor M1F Replace the indoor fan motor M1F Caution Be sure to...

Page 304: ...the fan Supposed Causes Defective indoor fan motor Broken wires Defective contact Troubleshooting CHECK 16 Refer to page 435 NO YES YES Is the X4A connector securely connected NO Is the power of 12 VDC supplied between the Pins 1 and 3 when the X4A is disconnected and the power supply turns ON Replace the indoor unit control PCB A1P Properly connect the connectors At this time check for any defect...

Page 305: ... the position signal of the fan motor Error from the current flow on the fan PCB when the fan motor starting operation Error Decision Conditions An overcurrent flows The rotation speed is less than a certain level for 6 seconds A position error in the fan rotor continues for 5 seconds or more Supposed Causes Clogging of a foreign matter Disconnection of the fan motor connectors X1A and X2A Disconn...

Page 306: ...eplace the indoor fan motor M1F YES NO YES The fan can be moved lightly by hand after the fan motor connector of the fan PCB A2P is removed Replace the indoor fan motor M1F NO YES NO YES There is a foreign matter around the fan The resistance between the power wire terminals of the fan motor and motor frame metal part is 1 MΩ or below Turn OFF the power and wait for 10 minutes A Remove the power w...

Page 307: ...tween GND and Hw Hv or Hu terminals are short circuited Replace the indoor fan motor M1F YES Replace the fan PCB A2P YES NO The resistance among U V and W are unbalanced or short circuited NO The HAP lamp of the indoor unit control PCB A1P blinks and the HAP lamp of the fan PCB A2P is OFF Turn ON the power Replace the indoor fan motor M1F A Remove the signal connector from the fan motor and check ...

Page 308: ... Supposed Causes Defective power supply for the indoor fan motor Clogged drain piping Activation of the indoor unit safety device Defective contact in the fan wiring circuit Troubleshooting Properly connect the cable NO YES YES Is the power supply cable of the indoor fan properly connected NO Is the fan normally running Restart the fan Replace the indoor unit control PCB A1P It is supposed that th...

Page 309: ...5 second intervals using the feedback of the fan motor Performs rotation sampling 720 times takes approximately one hour and if the rotation speed falls below 50 rpm over 100 times it is deemed abnormal operation When the sampling reaches 720 times the counted number will be cleared and the 720 times sampling restarts If during this the rotation command is stopped the 5 second interval check is ha...

Page 310: ...he information shows Motor Lost Control or Current Trip status it will be deemed a MOTOR TRIP abnormal operation The system stops operating Error Reset Conditions If the indoor unit stops receiving abnormal information the error will be cleared Supposed Causes Fan or motor obstruction Blocked filters Power interruption low voltage Incorrect wiring Blockage in the airflow ductwork or ductwork under...

Page 311: ...ts If during this the rotation command is stopped the 5 second interval check is halted but the counted number will be kept When the rotation command is restarted the checks will resume Error Reset Conditions Determining successive abnormalities Checks the rotation speed at 5 second intervals using the feedback of the fan motor If that figure exceeds 150 rpm even once the error will be cleared Det...

Page 312: ...uipped with a swing flap function The swing motor works when the power supply is turned OFF and then restart The relay cable is short circuited or disconnected Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Provide 208 230 V power supply YES NO The connector is connected to the indoor unit control PCB 1 Go to the next page Replace...

Page 313: ...M1S FXAQ P X36A M1S Replace the power supply relay cable Replace the defective swing motor 2 Take the flap cam mechanism apart reassemble and turn ON again YES NO YES NO The relay cable has no continuity When the airflow direction flap cam mechanism is disconnected from the swing motor operation is normal when turned ON again A ...

Page 314: ...e Defective wiring Instantaneous power failure others Troubleshooting Check the condition of the power supply 1 Check if power supply voltage is 208 230 V 10 2 Check if there is power open phase or defective wiring 3 Check if power supply voltage unbalance is within 6 V YES There are problems on the condition of power supply described above Caution Be sure to turn off the power switch before conne...

Page 315: ...rror Decision Conditions If the information shows Over Under Voltage status it will be deemed a MOTOR VOLTS abnormal operation Error Reset Conditions If the information is normal the error will be cleared Supposed Causes High AC line voltage to indoor blower motor Low AC line voltage to indoor blower motor Incorrect wiring Corrective Actions Verify line voltage to indoor blower motor is within the...

Page 316: ...f suction air R2T temperature of liquid pipe of heat exchanger Supposed Causes Defective electronic expansion valve coil Defective indoor unit control PCB Defective relay cables Troubleshooting CHECK 18 Refer to page 439 NO YES Power is supplied NO Electronic expansion valve is connected to X7A of indoor unit control PCB NO Check of electronic expansion valve coil indicates normal NO YES YES YES R...

Page 317: ...ch error code of the gas furnace Refer to the gas furnace manual for details Troubleshooting 1 In some cases of gas furnace abnormality regarding gas combustion once an error occurs display indication of AA 03 is retained even after the gas furnace recovered from the error to notify the occurrence of the error The error indication disappears if you execute gas furnace combustion once or reset the ...

Page 318: ...he compressor is not in operation Error code is displayed but the system operates continuously Supposed Causes Humidifier unit optional accessory leaking Defective drain pipe upward slope etc Defective indoor unit control PCB Troubleshooting Modify the drain piping YES YES NO Field drain piping has a defect such as upward sloping NO A humidifier unit optional accessory is installed on the indoor u...

Page 319: ...the capacity code is not saved to the PCB and the capacity setting adaptor is not connected When a capacity that does not exist for that unit is set Supposed Causes The capacity setting adaptor was not installed Defective indoor unit control PCB Troubleshooting NO NO YES The indoor unit control PCB was replaced with a spare PCB YES The capacity setting adaptor need to be installed when replacing t...

Page 320: ...n Transmission conditions between the indoor unit control PCB A1P and fan PCB A2P are checked via microcomputer Error Decision Conditions When normal transmission is not carried out for a certain duration Supposed Causes Connection defective the connector between indoor unit control PCB A1P and fan PCB A2P Defective indoor unit control PCB A1P Defective fan PCB A2P External factor such as instanta...

Page 321: ... and connect X70A back to original condition Under above field setting mode second code No is 01 NO NO YES Replace the fan PCB A2P YES YES Is the connector between indoor unit control PCB A1P and fan PCB A2P accurately connected 1 NO C1 is displayed again Confirm the condition of transmission on indoor unit control PCB using field setting mode 2 Connect the connector X70A and turn ON the power aga...

Page 322: ...ormal message and determined as such by the indoor unit the indoor unit will execute a retry If everything fails for 5 seconds it is deemed to be a transmission abnormality Error Reset Conditions If the indoor unit receives even a single normal response message from the fan motor the error will be cleared Supposed Causes Incorrect or loose wiring Power interruption low voltage Corrective Actions C...

Page 323: ...pposed Causes Disconnection of the communication wire between the CXTQ TA and the gas furnace Power supply to the gas furnace is cut Troubleshooting NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 1 and 2 terminals of the gas furnace and the CXTQ TA are connected each other NO YES YES YES NO The communication wire to the gas fur...

Page 324: ...e 321 for C9 for FXTQ TA and CXTQ TA models CHECK 11 Refer to page 429 Is the thermistor normal Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Remove the thermistor from the indoor unit control PCB Then insert the connector again Remove the thermistor from the indoor unit control PCB and then measure the resistance of the thermist...

Page 325: ...of capacity setting adaptor Field setting error Troubleshooting NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Was indoor unit control PCB A1P replaced with a spare PCB YES YES YES NO NO Was correct capacity setting adaptor installed when replacing it with a spare PCB After establishing transmission for indoor and outdoor units...

Page 326: ...ormation on the manufacturer ID and output of the fan motor when initializing the fan motor If those figures are not the values recognized by the indoor unit it will be deemed abnormal operation If deemed abnormal operation it will keep retrying until the figures match Error Reset Conditions If the manufacturer ID and output match the error will be cleared Supposed Causes Incorrect size motor Indo...

Page 327: ...be included among the periodic control status information Error is issued when the information shows abnormality Error Decision Conditions If the parameter information shows abnormality it will be deemed abnormal operation At that point parameter settings when initializing the fan motor will be implemented from the beginning Error Reset Conditions If the parameter information is normal the error w...

Page 328: ...B Troubleshooting 1 Connector and indoor unit control PCB CHECK 11 Refer to page 429 Is the optional remote sensor is installed Field setting 10 20 2 is set to 03 Connector is connected to the indoor unit control PCB 1 Resistance is normal when measured after disconnecting the sensor from the indoor unit control PCB Caution Be sure to turn off the power switch before connecting or disconnecting co...

Page 329: ...ay be damaged YES NO Is CC displayed on the remote controller 2 YES NO Does it function normally Remove the humidity sensor from the indoor unit control PCB and insert it again Normal Poor connector contact Replace the humidity sensor PCB assy A2P 3 It is believed that external factors noise or else other than failure caused the error Delete the error code history from the remote controller 1 1 2 ...

Page 330: ...e sensor connector CE 01 Defective infrared floor sensor Temperature compensation circuit disconnection CE 02 Defective infrared floor sensor Temperature compensation short circuit CE 03 Defective infrared floor sensor element CE 04 Troubleshooting See diagnosis procedure 1 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Error code...

Page 331: ...nsor and address data No 22 25 Connect the connector correctly Connect the connector correctly NO YES YES Is the connection of the connector on infrared presence sensor PCB A4P and the connector 1 normal NO YES YES Is the connection of the sensor connector normal Normal NO Displays 15 by the above verification method Normal NO Displays CE 01 again or 15 for sensor and address data Replace the sens...

Page 332: ... sensor and address data No 26 Connect the connector correctly Connect the connector correctly NO YES YES Is the connection of the connector on infrared floor sensor PCB A3P and the connector 1 normal NO YES YES Is the connection of the sensor connector normal Normal NO Displays by the above verification method Normal NO Displays CE 02 again or for sensor and address data Replace the sensor Model ...

Page 333: ...floor sensor output refer to sensor and address data No 26 Is the connection of the sensor connector normal Displays by the above verification method Displays CE 03 again or for sensor and address data Replace the sensor Connect the connector correctly Connect the connector correctly Normal Normal Is the connection of the connector on infrared floor sensor PCB A3P and the connector 1 normal Model ...

Page 334: ...floor sensor output refer to sensor and address data No 26 Is the connection of the sensor connector normal Displays by the above verification method Displays CE 04 again or for sensor and address data Replace the sensor Connect the connector correctly Connect the connector correctly Normal Normal Is the connection of the connector on infrared floor sensor PCB A3P and the connector 1 normal Model ...

Page 335: ...Troubleshooting 1 How to delete the history of error codes Press the ON OFF button for 4 seconds and more while the error code is displayed in the inspection mode Clear the error code history 1 While in inspection mode press and hold the ON OFF button for a period of 4 seconds or more YES YES Is CJ displayed on the remote controller Is the field setting 10 20 2 correct YES YES Is a remote controll...

Page 336: ...n between the indoor unit and the outdoor unit are not normal Supposed Causes Defective outdoor unit main PCB A1P Defective connection communication line between indoor and outdoor units Troubleshooting Return to normal YES External factor other than error for example noise etc Connect the communication line correctly Replace the outdoor unit main PCB A1P NO NO Check if inside outdoor relay wires ...

Page 337: ...ting YES NO NO Is wiring passing through the current sensor T1A proper Insulation failure of compressor Insulation failure of component except compressor Pass proper wiring through the sensor Turn OFF the power supply and then disconnect compressor lead wire Reinstall wiring and then turn ON the power supply again NO Replace the compressor M1C YES Replace the relevant component YES Normal Continue...

Page 338: ...X101A Wiring disconnection Defective outdoor unit main PCB Troubleshooting NO YES YES Is the system reset to normal Is X101A connected The error is considered to have resulted from external factors other than failures e g noise Turn OFF the power supply and then disconnect compressor leads YES Properly connect the connector NO Confirm if there is a leakage with a Megger tester Replace the outdoor ...

Page 339: ...or unit main PCB A1P Momentary power failure Defective high pressure sensor Troubleshooting NO YES YES Replace the high pressure switch S1PH Remedy defective points YES Are the above 3 points OK Does the error E3 recur NO Is the operating pressure of the high pressure switch normal 4 0 MPa 580 psi NO 1 Mount a pressure gauge on the high pressure service port 2 Reset the operation using the remote ...

Page 340: ...actors that cause the high pressure to rise Connect the service checker and then compare the high pressure value measured by the service checker with the voltage measurement of the connector of the pressure sensor 1 Service Checker CHECK 12 A Replace the high pressure sensor S1NPH NO Compare the voltage measurement of the connector of the pressure sensor 1 with the measurement of the pressure gaug...

Page 341: ...he stop valve open Open the stop valve Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Replace the outdoor unit main PCB A1P NO YES Are both pressure values the same The low pressure sensor is normal and outdoor unit main PCB is also normal The low pressure has really become low CHECK 2 Eliminate factors that cause the low pressure...

Page 342: ...Troubleshooting by Error Code SiUS371901EB 335 Part 6 Service Diagnosis Reference Reference CHECK 2 Refer to page 417 CHECK 12 Refer to page 432 ...

Page 343: ...differential pressure 0 5 MPa 72 5 psi or more UVW connection error Defective inverter PCB Stop valve is not opened Troubleshooting Make proper wire connections Make proper wire connections NO NO NO NO YES YES YES YES Power OFF Is the connection line of the compressor normal Are wire connections made to phases U V and W in the proper order and manner Are wire connections made according to the Wiri...

Page 344: ...F Pressure equalization failure Check for the refrigerant system Quit work Pressure equalization failure may have occurred Check for the refrigerant system YES YES NO Replace the inverter PCB 1 NO The error recurs at startup Continue operation The error could have resulted from instantaneous power failure A Continue operation Replace the compressor CHECK 4 Is the power transistor normal This is no...

Page 345: ...system will return an alarm if there is any operational unit other than that applicable to E6 or determine to be error if not Supposed Causes Defective compressor Defective high pressure sensor Defective low pressure sensor Defective outdoor unit main PCB Defective inverter PCB Troubleshooting NO YES Are the characteristics of the high pressure sensor normal 1 1 Mount a pressure gauge on the high ...

Page 346: ... A A4P CHECK 4 Refer to page 421 CHECK 12 Refer to page 432 NO YES Are the high pressure and ow pressure checked by the service checker the same as the actual measured values of the high and low pressure sensors Replace the outdoor unit main PCB A1P NO Replace the inverter PCB 2 CHECK 4 Is the power transistor normal YES Replace the compressor A ...

Page 347: ...an motor and the PCB Fan does not rotate due to foreign matter caught in it Clearing condition fan motor performs normal operation for a period of 5 minutes Troubleshooting There are foreign matter around the applicable fan Remove the foreign matter YES Check for the connections of all fan motor connectors NO Turn OFF the power supply and then wait for a period of 10 minutes Some connectors are di...

Page 348: ...levant fan motor M1F M2F YES Resistance between U V W phases of the fan motor power supply cable has lost balance or short circuit is caused between U V W phases Check for the connector power supply cable of the fan motor NO CHECK 16 Replace the fan PCB A4P A5P YES The HAP lamp on the inverter PCB blinks but does not blink on the fan PCB Replace the relevant fan motor M1F M2F YES Signal cable has ...

Page 349: ...ting There are Ioreign matter around the applicable fan Remove the foreign matter YES Check for the connections of all fan motor connectors 1 NO Turn OFF the power supply and then wait for a period of 10 minutes Some connectors are disconnected Insert the connector YES NO NO There is a relay connection error Correct the connection of the relay harness YES Caution Be sure to turn off the power swit...

Page 350: ... less than 1 M Replace the relevant fan motor M1F M2F YES NO YES Resistance between U V W phases of the fan motor power supply cable has lost balance or short circuit is caused between U V W phases Check for the connector power supply cable of the fan motor NO CHECK 16 Replace the fan PCB A5P A6P YES The HAP lamp on the fan PCB does not blink Turn ON the power supply to check for the HAP lamps on ...

Page 351: ...en turn it ON again Return to normal Investigate external causes other than failures e g noise YES NO Connector for the electronic expansion valve of the outdoor unit main PCB A1P is connected Properly and securely connect the connector NO YES Replace the electronic expansion valve NO Replace the outdoor unit main PCB A1P YES Caution Be sure to turn off the power switch before connecting or discon...

Page 352: ...s abnormally high i e 135 C 275 F or more When discharge pipe temperature sharply rises remains at 120 C 248 F or more for a period of consecutive 10 minutes When compressor surface temperature becomes abnormally high i e 120 C 248 F or more When compressor surface temperature sharply rises remains at 115 C 239 F or more for a period of consecutive 10 minutes Supposed Causes Abnormal discharge pip...

Page 353: ...s are normal and temperature detection with the outdoor unit main PCB is also normal The discharge pipe temperature or compressor surface temperature has really become high CHECK 3 Eliminate the causes of superheat operation Service Checker Connect the Service Checker and then make a comparison between discharge pipe temperature or compressor surface temperature and low pressure checked by the Ser...

Page 354: ...part Error Decision Conditions When the following wet state continues for a period of 90 minutes an alert is issued An error is defined for 120 minutes Wet state in outdoor units When the following wet state continues for a period of 45 minutes an alert is issued Wet state in some of indoor units Supposed Causes Defective suction pipe thermistor Defective compressor suction thermistor Defective di...

Page 355: ...S NO Replace the indoor unit electronic expansion valve Replace the relevant thermistor YES YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Are the characteristics of the suction pipe thermistor R10T and the compressor suction thermistor R12T normal NO Replace the discharge pipe thermistor YES NO Replace the high pressure senso...

Page 356: ...auses Refrigerant overcharged Disconnection of outdoor air thermistor Disconnection of heat exchanger deicer thermistor Disconnection of liquid pipe temperature thermistor Troubleshooting CHECK 11 Refer to page 429 Check for the conditions of mounting of the temperature sensors of the outdoor air thermistor the heat exchanger thermistor and liquid pipe thermistor to the piping Disconnect the outdo...

Page 357: ...tive PCB of Branch Selector unit Troubleshooting While in monitor mode identify an electronic expansion valve subject to the Error Code F9 1 Identify the electronic expansion valve coil to be checked based on the table 2 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged YES Return to normal Turn power supply OFF and turn power supply...

Page 358: ...ode F9 CHECK 18 Refer to page 439 Electronic expansion valve Sub code Electronic expansion valve EVH 01 Electronic expansion valve EVL 02 Electronic expansion valve EVSC 05 Model Electronic expansion valve to be checked Sub code BSQ T All electronic expansion valves Any code BS Q54T BSF Q54T All the electronic expansion valves of branch selector unit PCBs that are connected to indoor units issuing...

Page 359: ...pressor is not running Supposed Causes Defective connection of jumpers between PCB Defective outdoor unit main PCB A1P Defective inverter PCB Troubleshooting 1 REYQ XATJU A REYQ XAYDU A A3P REYQ XAYCU A A4P Check for the transmission conditions of the following harnesses 1 X6A Inverter PCB X28A A1P 2 X63A Inverter PCB X40A A1P Replace the outdoor unit main PCB A1P Replace the inverter PCB 1 YES NO...

Page 360: ...tive inverter PCB A3P Troubleshooting CHECK 17 Refer to page 437 Properly connect the connector NO YES Replace the fan motor M1F M2F NO YES Turn OFF the power supply Check for fan motor applicable to the error code H7 while in monitor mode Sub code H7 01 05 Fan motor 1 M1F Master Slave 1 H7 02 06 Fan motor 2 M2F Master Slave 1 Check for the connector of the fan motor Replace the fan PCB A4P A5P Ca...

Page 361: ...nt fan motor M1F M2F NO YES Check for fan PCB applicable to the error code H7 while in monitor mode H7 21 23 25 Fan PCB A6P Master Slave 1 Slave 2 H7 22 24 26 Fan PCB A5P Master Slave 1 Slave 2 Replace the fan PCB 1 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Is the connector of relevant fan motor normally connected 1 Resistanc...

Page 362: ...s wiring disconnection or short circuit in it Supposed Causes Defective connection of thermistor Defective thermistor Defective outdoor unit main PCB Troubleshooting Thermistor is connected to the connector Replace the outdoor unit main PCB A1P Connect the connector and turn ON again NO NO Replace the thermistor 1 YES YES Caution Be sure to turn off the power switch before connecting or disconnect...

Page 363: ...rmistor R12T X15A Group connector Suction pipe thermistor R10T X29A Group connector J6 Heat exchanger deicer thermistor R11T X15A Group connector Heat exchanger gas pipe thermistor R8T R9T X29A Group connector J7 Receiver inlet thermistor R3T X30A Group connector Subcooling heat exchanger liquid pipe thermistor R7T Subcooling injection thermistor R16T X15A Group connector J8 Heat exchanger liquid ...

Page 364: ...CK 12 Refer to page 432 Are the characteristics of the high pressure sensor normal Make a comparison between voltage characteristics and gauge pressure Replace the high pressure sensor S1NPH Replace the outdoor unit main PCB A1P NO Is the PCB detection pressure normal Make a comparison between data on pressure checked by the Service Checker and the voltage characteristics Replace the outdoor unit ...

Page 365: ...12 Refer to page 432 Check 12 Are the characteristics of the low pressure sensor normal Make a comparison between voltage characteristics and gauge pressure Replace the low pressure sensor S1NPL Replace the outdoor unit main PCB A1P NO Check 12 Is the PCB detection pressure normal Make a comparison between data on pressure checked by the Service Checker and the voltage characteristics Replace the ...

Page 366: ...t value during the output of waveform before compressor startup Detect current value with the current sensor during synchronous operation for startup Error Decision Conditions When the overcurrent flows during the output of waveform When the current sensor error during synchronous operation When IPM error occurs Supposed Causes Inverter PCB IPM failure Current sensor failure Drive circuit failure ...

Page 367: ...Is the insulation to ground resistance of the relevant compressor 100 k or more The error could have resulted from external factors other than failures e g external noise or thunder YES Replace the compressor and the inverter PCB 1 together Replace the inverter PCB 1 NO NO YES Replace the inverter PCB 1 and the fan PCB 2 Replace the inverter PCB 1 NO YES Turn OFF the power supply once and then tur...

Page 368: ...ncy detection circuit on the outdoor unit main PCB Supposed Causes Defective wiring Defective outdoor unit main PCB Troubleshooting Error recurs after turning OFF the power and ON again Any disconnection of connectors loose contact or wiring disconnection in the transmission wirings to the outdoor unit main PCB NO YES YES NO Temporary problem Correct any fault Replace the outdoor unit main PCB A1P...

Page 369: ...he reactor surface thermistor is more than the specified temperature Supposed Causes Defective connection of harness Defective reactor surface thermistor Defective inverter PCB Troubleshooting Is reactor harness connected to the terminal strip correctly Is there wiring disconnection in the reactor surface thermistor NO YES YES NO Connect the harness correctly Replace the thermistor Replace the inv...

Page 370: ...ror Code L4 Sub code 01 03 Method of Error Detection Detect temperature of power module of the inverter PCB Error Decision Conditions Thermistor located inside the power module of the inverter PCB for compressor and fan motor Cooling tube plate poor heat exchange Supposed Causes Cooling tube plate not fixed with screws U0 error Defective inverter PCB High outdoor air temperature Incorrect power su...

Page 371: ...y voltage falls within 10 of the rated voltage Replace the inverter PCB 2 Connect to power supply within 10 of the rated voltage NO YES Rectify troubles Normal Power OFF NO NO 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 screen Reinsert the connectors X7A and X8A for fin th...

Page 372: ...not fixed with screws U0 error Defective fan PCB High outdoor air temperature Troubleshooting Continue operation Field factor Radiation fin temperature may have risen due to high outdoor air temperature Turn ON the power supply and then press the ON button Does the error recur Replace the fan PCB A5P A6P YES Rectify troubles Normal NO Check for the cooling conditions of radiation fin used to cool ...

Page 373: ...tive inverter PCB Troubleshooting Power OFF Open the stop valve YES NO Is the stop valve open YES YES Are wiring and wire connections to the relevant compressor normal Rectify the wiring and wire connections NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Are the leads of the relevant compressor normal Replace the leads of the r...

Page 374: ...power transistor normal Power OFF YES Restarting the system results in the recurrence of the error Continue operation Replace the compressor NO YES Replace the inverter PCB 1 YES Restarting the system results in the recurrence of the error Continue operation The error could have resulted from causes such as instantaneous power failure NO Replace the inverter PCB 1 NO Power OFF A ...

Page 375: ...voltage Troubleshooting Power OFF Open the stop valve YES NO Is the stop valve open YES YES Are wiring and wire connections to the relevant compressor normal Rectify the wiring and wire connections NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Are the leads of the relevant compressor normal Replace the leads of the relevant co...

Page 376: ...nd Low pressure before the compressor restart is below 0 2 MPa Continue operation Replace the compressor Connect to power supply within 10 of the rated voltage NO NO Pressure equalization failure Check the refrigerant system Power supply voltage falls within 10 of the rated voltage YES YES Replace the inverter PCB 1 Restarting the system results in the recurrence of the error Continue operation Th...

Page 377: ...ooting YES NO NO Apply power and then restart operation NO Are the leads of the compressor disconnected Connect the leads of the compressor YES Is the insulation resistance of the relevant compressor 100 kΩ or more Replace the compressor NO YES YES YES Refrigerant is stagnated The unit is out of power supply for more than 6 hours Solve the refrigerant stagnation Power should be supplied for more t...

Page 378: ...e compressor and the refrigerant system NO Replace the inverter PCB 1 NO YES NO The internal wiring of the compressor coil is defective Replace the compressor YES Is the insulation resistance of the relevant compressor 100 k or more Refrigerant is stagnated The unit is out of power supply for more than 6 hours Replace the compressor NO Solve the refrigerant stagnation Power should be supplied for ...

Page 379: ...outdoor unit main PCB transmission block Defective noise filter compressor or fan motor External factors e g noise Failure of inverter PCB or fan PCB Troubleshooting Does the inverter PCB part No match that of the spare parts list Replace with a proper PCB NO Properly connect the connector NO YES Replace the fan motor M1F M2F YES NO The insulation resistance of the relevant compressor is less than...

Page 380: ...een on the outdoor unit main PCB A1P is blinking Properly connect the connector NO YES Is the connector between the outdoor unit main PCB and the sub PCB securely connected Properly connect the connector X9A X10A on the sub PCB option NO Is the normal operation indication LED on the sub PCB blinking YES NO Replace the outdoor unit main PCB A1P YES The fuse of the noise filter PCB has blown out Con...

Page 381: ...lance through inverter PCB Error Decision Conditions When power supply voltage imbalance exceeds approximately 12 V Error is not decided while the unit operation is continued P1 will be displayed by pressing the inspection button Supposed Causes Open phase Interphase voltage imbalance Defective capacitor in the main circuit Defective inverter PCB Defective magnetic relay Defective wiring in the ma...

Page 382: ...pare part Hand the Notice of Inspection Results to user to ask him her to rectify the imbalance Be sure to explain user that power supply voltage imbalance will occur and Daikin accepts no responsibility for the imbalance Use equipment capable of constantly recording power supply voltages e g Memory HiCorder to record power supply voltages between phases R S S T and R T for a period of consecutive...

Page 383: ...stor causes wiring disconnection or short circuit in it Supposed Causes Defective connection of thermistor Defective reactor surface thermistor Defective inverter PCB Troubleshooting Make measurement of resistance of the radiation fin thermistor Is the resistance of the thermistor normal Turn ON the power supply Does the error recur NO YES YES NO Replace the inverter PCB A3P Replace the inverter P...

Page 384: ...tinued P4 will be displayed by pressing the inspection button Supposed Causes Defective radiation fin temperature thermistor Defective inverter PCB Defective compressor Defective fan motor Troubleshooting 1 REYQ XATJU A REYQ XAYDU A A3P REYQ XAYCU A A4P Make measurement of resistance of the radiation fin thermistor Is the resistance of the relevant thermistor normal The insulation resistance of th...

Page 385: ...alent to open or short circuit Supposed Causes Defective fan PCB Defective fan motor Troubleshooting 1 REYQ XATJU A A4P A5P REYQ XAYDU A A4P A5P REYQ XAYCU A A5P A6P The insulation resistance of the relevant fan motor is not more than 1 M Turn ON the power supply Does the error recur NO YES NO YES Replace the fan motor M1F M2F Replace the fan PCB 1 Continue operation Caution Be sure to turn off th...

Page 386: ...eshooting 1 REYQ XATJU A A3P REYQ XAYDU A A3P REYQ XAYCU A A4P 2 REYQ XATJU A A4P A5P REYQ XAYDU A A4P A5P REYQ XAYCU A A5P A6P Does the inverter PCB part No match that of the spare parts list Does the fan PCB part No match that of the spare parts list Has the DIP switch setting been made properly to replace the outdoor unit main PCB Does the Under Preparation indication lamp H2P on the outdoor un...

Page 387: ... to page 417 CHECK 12 Refer to page 432 Is the low pressure 0 1 MPa 14 5 psi or less 1 Is the characteristics of low pressure sensor normal 2 Replace the low pressure sensor S1NPL Replace the outdoor unit main PCB A1P NO NO YES YES Eliminate factors that cause decreasing low pressure CHECK 2 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be ...

Page 388: ... is reverse phase or T phase is open phase Supposed Causes Power supply reverse phase T phase open phase Defective outdoor unit main PCB A1P Troubleshooting There is an open phase at the power supply T phase terminal section X1M of the outdoor unit Operation is normal if one phase of power supply line phase is replaced Fix the open phase Requires inspection of field power supply section Reverse ph...

Page 389: ...nit main PCB A1P Troubleshooting There is an open phase at the power supply T phase terminal section X1M of the outdoor unit Operation is normal if one phase of power supply line phase is replaced Faulty wiring or wiring disconnection between the outdoor unit main PCB A1P and the open phase protection PCB A10P Fix the open phase Requires inspection of field power supply section Reverse phase Count...

Page 390: ...failure Open phase Defective inverter PCB Defective outdoor unit main PCB Defective compressor Defective main circuit wiring Defective fan motor Defective connection of signal cable Troubleshooting There are some defects in the power supply conditions aforementioned The insulation resistance of the compressor is less than 100 k NO YES YES Fix the defects Replace the compressor M1C Check for power ...

Page 391: ...ON button Replace the inverter PCB 1 If the inverter PCB gets severely damaged the compressor and the fan motor M1F M2F may have been damaged Replace the inverter PCB 1 If the inverter PCB gets severely damaged check for the compressor Continue operation The error could have resulted from causes such as instantaneous power failure A Is the power transistor normal YES NO Replace the inverter PCB 1 ...

Page 392: ...ub code and then go to the following Conduct the test operation The test operation has not been conducted U3 03 Check for the refrigerant piping and then conduct the test operation U3 04 Conduct the test operation due to the premature end of the test operation U3 05 Conduct the test operation due to the premature end of the test operation U3 06 Check for transmission between indoor and outdoor uni...

Page 393: ...Microcomputer checks if transmission between indoor and outdoor units is normal Error Decision Conditions Transmission is not carried out normally for a certain amount of time Supposed Causes Open phase in power supply wiring Short circuit in indoor outdoor or outdoor outdoor transmission wiring F1 F2 or wrong wiring Outdoor unit power supply is OFF System address does not match Defective indoor u...

Page 394: ... ON BLINK SEG1 SEG2 SEG3 1 2 Correct the voltage Replace the fuse Press and hold the RETURN BS3 button on the outdoor unit main PCB for a period of 5 seconds or more YES NO YES YES Replace the indoor unit control PCB Press and hold the RETURN BS3 button on the master outdoor unit main PCB for a period of 5 seconds or more The system will not operate for a period of 12 minutes at maximum Modify the...

Page 395: ...ive PCB 2 Test operation was interrupted by the MODE BS1 button YES Check all indoor error indication NO Operate all indoor units YES Do all units display U9 Carry out the diagnosis again after a lapse of 2 minutes or more NO Did 2 minutes or more elapse after U9 is displayed Are the indoor outdoor and outdoor outdoor transmission wirings normal Disconnect the outdoor outdoor transmission wiring D...

Page 396: ... Main Sub setting Control by 2 remote controllers Main Sub setting of both remote controllers is set to Main All indoor unit control PCB microcomputer normal monitors blinking Resets normally when power supply is turned OFF temporarily NO NO NO YES NO Replace the indoor unit control PCB Set one of the remote controllers to Sub turn OFF the power supply temporarily then restart operation The error ...

Page 397: ...onditions When transmission is not carried out normally for a certain amount of time Supposed Causes Connection error of transmission wirings between outdoor unit and external control adaptor for outdoor unit Connection error of transmission wirings between outdoor units Cool Heat selection setting error Cool Heat unified address setting error functional unit external control adaptor for outdoor u...

Page 398: ...adaptor is mounted Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Go to Diagnosis Flowchart 3 Transmission error between master and slave 1 Go to Diagnosis Flowchart 4 Transmission error between master and slave 2 Go to Diagnosis Flowchart 5 Multi system error Go to Diagnosis Flowchart ...

Page 399: ...utdoor unit Diagnosis Flowchart 1 Supply power to the outdoor unit Is power supplied to the outdoor unit Is the normal operation monitor LED on the outdoor unit main PCB blinking Is the normal operation monitor LED on the external control adaptor for outdoor unit blinking Transmission error when the external control adaptor is mounted Is the power supply cable of the external control adaptor for o...

Page 400: ... the error recur when setting Cool Heat selection for the external control adaptor for outdoor unit to IND NO NO NO NO NO NO NO NO YES YES YES YES YES YES YES YES Replace the outdoor unit main PCB A1P Replace the external control adaptor for outdoor unit main PCB Connect the power supply cable of the external control adaptor for outdoor unit to the 16 VDC power supply line Replace the outdoor unit...

Page 401: ...nsmission wirings to multi slave 1 have caused wiring disconnection in them or are being disconnected Modify the outdoor unit multi transmission wirings and then reset the power supply Replace the outdoor unit main PCB A1P for multi slave 1 Modify the outdoor unit multi transmission wirings and then reset the power supply Diagnosis Flowchart 3 Transmission error between master and slave 1 Error co...

Page 402: ...ply Replace the outdoor unit main PCB A1P Replace the outdoor unit main PCB A1P Rectify the error in the connection of transmission wirings and then reset the power supply One of outdoor unit multi transmission wirings has caused wiring disconnection in it or been disconnected NO The capacity to connect indoor units falls within the specified range Check the capacity to connect indoor units Diagno...

Page 403: ...rror between main and sub remote controller Connection between sub remote controllers Defective remote controller PCB Troubleshooting Refer to page 111 for Main Sub setting Main Sub setting of both remote controllers are set to Sub Main Sub setting of the remote controller is set to Main Set Main Sub setting of the remote controller to Main Turn OFF the power supply and restart operation Set Main ...

Page 404: ...units Defective electronic expansion valve of other indoor unit Defective indoor unit control PCB of other indoor unit Improper connection of transmission wiring between indoor and outdoor unit Multi tenant function is ON Troubleshooting U9 has been displayed for 2 minutes or more The outdoor unit main PCB indicated by the error code U9 is normal Check for the indoor unit of other system and then ...

Page 405: ...tween indoor Branch Selector and outdoor units The number of indoor units is out of the allowable range Signal transmission between indoor Branch Selector and outdoor units is abnormal Error Decision Conditions The error decision is made as soon as either of the abnormalities aforementioned is detected Supposed Causes Excess of connected indoor units Defective outdoor unit main PCB Mismatch of the...

Page 406: ...r unit Error code Sub code UA 28 Go to Diagnosis Flowchart 9 DIP switch setting error of Multi Branch Selector unit Error code Sub code UA 53 Ensure the sub code or the lamp display of monitor mode and then go to the following Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Go to Diagnosis Flowchart 1 Connection of excess indoor un...

Page 407: ...PCB A1P Refer to Incorrect electric heater capacity setting troubleshooting 1 Excess indoor units are connected Check for the connection to connect the proper number of indoor units NO Diagnosis Flowchart 1 UA 17 Error code Sub code NO Is the model of indoor unit FXTQ TA YES NO YES Check if the refrigerant type of the outdoor unit corresponds to that of the indoor unit Replace the outdoor unit mai...

Page 408: ...spare PCB made Diagnosis Flowchart 4 NO Correct the wirings If no defect is found in the wirings replace the outdoor unit main PCB A1P YES NO YES NO YES Error in the system design Replace with a single outdoor unit system or eliminate the Branch Provider unit A Branch Selector unit and a Branch Provider unit are mixed in the same system A Branch Provider unit is connected in a system with multi ou...

Page 409: ...1P NO Correct the wiring Diagnosis Flowchart 5 Is the wiring between outdoor unit and Branch Selector unit correct Error code Sub code UA 25 YES Replace the relevant Branch Selector unit PCB NO Correct the wiring Diagnosis Flowchart 6 Is the wiring between Branch Selector units correct Error code Sub code UA 26 ...

Page 410: ... NO Replace the indoor unit PCB or the Branch Selector unit PCB Is the Branch Selector unit PCB correct Error code Sub code UA 27 YES Replace the outdoor unit main PCB A1P NO Connect the correct model Diagnosis Flowchart 8 Is the correct model of Branch Selector unit connected Error code Sub code UA 28 Are the transmission wires between indoor unit and Branch Selector unit correct ...

Page 411: ...ch Selector unit correct the DIP switch settings Turn ON the power supply of the Multi Branch Selector unit and press the RETURN BS3 button on the outdoor unit main PCB A1P for 5 seconds or more Diagnosis Flowchart 9 Is the DIP switch of the Multi Branch Selector unit correct NO Correct the connection Is the indoor unit of the Multi Branch Selector unit connected correctly NO Turn ON the power sup...

Page 412: ...urnace and other indoor units other than CXTQ TA are connected Error Decision Conditions Check that two or more CXTQ TA gas furnace and other indoor units other than CXTQ TA are not connected Operation After Error Codes Decided The error code UA is displayed on the remote controller Change to be the system that one CXTQ TA gas furnace and other indoor units other than CXTQ TA are connected ...

Page 413: ...non applicable value Operation After Error Codes Decided The error code UA 17 is displayed on the remote controller Indoor units can operate continuously Incorrect setting is kept Even if the ON condition for electric heater 2 is established only electric heater 1 will be set to ON Electric heater 1 set to ON electric heater 2 set to OFF In order to deliver in terms of user friendliness and safety...

Page 414: ...s that of its own on any other indoor unit Error Decision Conditions The error decision is made as soon as the abnormality aforementioned is detected Supposed Causes Address duplication of centralized controller Defective indoor unit PCB Troubleshooting Make setting change so that the centralized address will not be duplicated The centralized address is duplicated Caution Be sure to turn off the p...

Page 415: ...crocomputer checks if transmission between indoor unit and centralized controller is normal Error Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes Transmission error between optional controllers for centralized controller and indoor unit Connector for setting main controller is disconnected or disconnection of connector for independent ...

Page 416: ... No for indoor unit changed Make correct setting of the central control group No Check outdoor units to which the refrigerant system is connected Check whether or not there are no problems with the transmission wiring length types of cables and wires number of units connected and others If no problems replace the indoor unit control PCB NO YES YES NO NO YES Make sure there are no hazardous situati...

Page 417: ...re Replace the centralized controller Centralized controller Normal OK Correct the wiring NG A NO Correct the wiring NG YES YES Disconnect the transmission wiring of the main centralized controller and then check the voltage between the transmission terminals F1 and F2 of the master unit transmission equipment using a multimeter It is supposed that the error results from external factors e g noise...

Page 418: ...smission wiring between indoor outdoor units and outdoor outdoor units Failure to execute check operation Defective indoor unit PCB Stop valve is not opened Troubleshooting Is indoor outdoor and outdoor outdoor unit transmission wiring normal Is indoor outdoor and outdoor outdoor unit transmission wiring normal Replace the indoor unit control PCB Wiring check operation may not have been carried ou...

Page 419: ...ess function 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 button pressed for more than 5 seconds Error Decision Conditions The error decision is made as soon as the abnormality aforementioned is detected Supposed Causes Improper connection of transmission wiring ...

Page 420: ...oor units in the system NO After fixing the incorrect wiring press the RETURN BS3 button on the outdoor unit main PCB for 5 seconds The unit will not run for up to 12 minutes NO NO Install the DIII NET extension adaptor YES YES NO Normal NO Press the RETURN BS3 button on the outdoor unit PCB for 5 seconds YES YES Normal YES Replace the outdoor unit main PCB A1P YES Disconnect the outdoor outdoor u...

Page 421: ...of the gas furnace is turned ON after a certain period of time has been elapsed after the power of the CXTQ TA was turned ON Disconnection of the communication wire between the CXTQ TA and the gas furnace Two or more gas furnaces are connected to one CXTQ TA No gas furnace is connected Troubleshooting YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or...

Page 422: ...or communication with the gas furnace completes and after elapsing 4 minutes after the power is turned ON Two or more gas furnaces are detected Any unit other than the gas furnace is detected Supposed Causes Connection of wrong devices Two or more gas furnaces are connected to one CXTQ TA Troubleshooting YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors...

Page 423: ...nce Dirty filter Obstacle Excessiverefrigerantcharging Improper model selection In heating Check to be sure the stop valve is open Conduct visual checks for pipe conditions Is there any temperature difference caused before and after the filter or branch pipe Are the coil resistance and insulation normal Is the pressure value checked with the Service Checker corresponding to the measurement value o...

Page 424: ...nce and insulation normal If a spare PCB is mounted is the capacity setting properly made Is the air filter clogged Is there any obstacle in the airflow passage Defective outdoor unit main PCB Including capacity setting High airflow passage resistance Dirty filter Obstacle Defective electronic expansion valve control Is the pressure value checked with the Service Checker corresponding to the measu...

Page 425: ... 6 Service Diagnosis 418 Reference Reference CHECK 7 Refer to page 427 CHECK 8 Refer to page 428 4 In heating the outdoor unit electronic expansion valve main is used for superheating degree control of outdoor heat exchanger ...

Page 426: ...f the outdoor unit electronic expansion valve excessively throttled 3 Temperature increase of discharge pipe Defective injection electronic expansion valve Are the coil resistance and insulation normal Is the connector properly connected Are the thermistor resistance characteristics normal Are the voltage characteristics normal Is the pressure value checked with the Service Checker corresponding t...

Page 427: ...f 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 ...

Page 428: ... using the analog type of multimeter make measurement in resistance measurement mode in the x1 kΩ range When using the digital type of multimeter make measurement in diode check mode Judgement Criteria Remarks Judgement Criteria Remarks 1 P4 U 2 30 kΩ 1 2 V or more Due to condenser charge and so on resistance measurement may require some time 2 P4 V 3 P4 W 4 U P4 15 kΩ and more including Due to co...

Page 429: ...t in diode check mode Judgement Criteria Remarks Judgement Criteria Remarks 1 P31 U 2 30 kΩ 1 2 V or more Due to condenser charge and so on resistance measurement may require some time 2 P31 V 3 P31 W 4 U P31 15 kΩ and more including Due to condenser charge and so on resistance measurement may require some time 0 3 0 7 V 5 V P31 6 W P31 7 N31 U 8 N31 V 9 N31 W 10 U N31 2 30 kΩ 1 2 V or more Due to...

Page 430: ... check mode Judgement Criteria Remarks Judgement Criteria Remarks 1 P21 U 2 30 kΩ 1 2 V or more Due to condenser charge and so on resistance measurement may require some time 2 P21 V 3 P21 W 4 U P21 15 kΩ and more including Due to condenser charge and so on resistance measurement may require some time 0 3 0 7 V 5 V P21 6 W P21 7 N5 U 8 N5 V 9 N5 W 10 U N5 2 30 kΩ 1 2 V or more Due to condenser cha...

Page 431: ... mode Judgement Criteria Remarks Judgement Criteria Remarks 1 P31 U 2 30 kΩ 1 2 V or more Due to condenser charge and so on resistance measurement may require some time 2 P31 V 3 P31 W 4 U P31 15 kΩ and more including Due to condenser charge and so on resistance measurement may require some time 0 3 0 7 V 5 V P31 6 W P31 7 N31 U 8 N31 V 9 N31 W 10 U N31 2 30 kΩ 1 2 V or more Due to condenser charg...

Page 432: ...e digital type of multimeter make measurement in diode check mode Judgement Criteria Remarks Judgement Criteria Remarks 1 P31 U 2 30 kΩ 1 2 V or more Due to condenser charge and so on resistance measurement may require some time 2 P31 V 3 P31 W 4 U P31 15 kΩ and more including Due to condenser charge and so on resistance measurement may require some time 0 3 0 7 V 5 V P31 6 W P31 7 N31 U 8 N31 V 9...

Page 433: ...ises with increase in frequency Subcooling degree becomes higher Liquid connection pipe temperature lowers Low pressure rises due to decreased compressor output High pressure Low pressure Frequency Heating The outdoor unit electronic expansion valve is closed due to the overload control Frequency comes to the minimum level Highpressure is maintained at a constant level Low pressure rises due to de...

Page 434: ...e minimum level Fan control is activated for high pressure protection under cooling control at low outdoor air temperature i e the fan is hunting at high pressure High pressure drops with decrease in compressor capacity If frequency comes to the minimum level low pressure cannot be maintained Low pressure rises as the opening degree of the indoor unit electronic expansion valve becomes larger Freq...

Page 435: ...7 kPaG 14 6 psiG or less for a period of 1 hour or more and then check to be sure that the vacuum gauge reading does not rise If the reading rises moisture may have remained in the system or refrigerant leakage may have been caused 3 Additional refrigerant charge Purge air from the manifold gauge connection hoses and then charge a necessary amount of refrigerant Special vacuuming and dehydration U...

Page 436: ...TA FXMQ MF Type B Type J Type J Thermistor Thermistor type R1T Outdoor air thermistor Type E R21T Discharge pipe thermistor Type H R3T Receiver inlet thermistor Type A R4T Heat exchanger liquid pipe upper thermistor R5T Heat exchanger liquid pipe lower thermistor R6T Subcooling heat exchanger gas pipe thermistor R7T Subcooling heat exchanger liquid pipe thermistor R8T Heat exchanger gas pipe upper...

Page 437: ...9947 51 07 10 50 39 91 39 9149 39 97 15 59 31 44 31 4796 31 51 20 68 24 95 25 0060 25 02 25 77 19 94 20 0000 20 00 30 86 16 04 16 1008 16 10 35 95 12 99 13 0426 13 04 40 104 10 58 10 6281 10 63 45 113 8 669 8 7097 8 711 50 122 7 143 7 1764 7 179 55 131 5 918 5 9407 60 140 4 928 4 9439 65 149 4 123 4 1352 70 158 3 467 3 4757 75 167 2 9349 80 176 2 4894 85 185 2 1205 90 194 1 8138 95 203 1 5575 100 ...

Page 438: ...6 1326 160 2244 16 1860 35 95 13 0683 130 0697 13 1222 40 104 10 6490 106 1517 10 7042 45 113 8 7269 87 0725 8 7834 50 122 7 1905 71 7703 7 2479 55 131 5 9524 59 4735 6 0131 60 140 4 9536 49 5180 5 0144 65 149 4 1434 41 4168 4 2021 70 158 3 4825 34 7923 3 5381 75 167 2 9407 29 3499 2 9925 80 176 2 4943 24 8586 2 5420 85 185 2 1247 21 1360 2 1671 90 194 1 8173 18 0377 1 8554 95 203 1 5605 15 4487 1...

Page 439: ...C kg cm2 psi MPa PH PL PH MPa VH 0 5 PL MPa VL 0 5 PH High pressure MPa PL Low pressure MPa VH Output Voltage High Side VDC VL Output Voltage Low Side VDC 4 15 3 0 4 15 3 0 1 7 3 0 1 7 3 0 1 MPa 145 psi 40 8 35 7 30 6 25 5 20 4 15 3 10 2 45 9 51 0 72 5 725 653 580 508 435 363 290 218 145 72 5 0 5 V 4 3 2 1 Red Black White X32A High pressure sensor Microcomputer A D input Make measurement of DC vol...

Page 440: ...it D between the outdoor outdoor unit terminal of the Outdoor Unit C in the order described thus identifying the place with continuity If the place with continuity can be identified there may be broken wires in places before the said place with continuity 2 Procedure for checking indoor outdoor unit transmission wiring for broken wires for checking the indoor outdoor unit transmission wiring of th...

Page 441: ...or continuity If there is continuity the indoor outdoor unit transmission has no broken wires in it Indoor outdoor Unit Transmission Wiring 2 Short circuit between the indoor outdoor unit terminal parts 1 Check the transmission wiring for continuity If there is continuity the outdoor outdoor unit transmission has no broken wires in it Unified ON OFF controller Central remote controller ...

Page 442: ... FXHQ M FXSQ54TA FXMQ15 54PB Remove the X1A connector from the fan PCB A2P and measure the resistance between the U and V V and W and W and U phases of the motor connector with five conductors and check that each phase are balanced within a permissible dispersion range of 20 Model Judgment Black Red Black White FXDQ07 12M 71 0 Ω 10 73 5 Ω 10 FXDQ18 24M 39 2 Ω 10 41 3 Ω 10 FXHQ12M 71 0 Ω 10 73 5 Ω ...

Page 443: ...ply 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 Measure the resistance values between phases U V W Red White Black W V U ...

Page 444: ...UQ P FXSQ05 48TA FXMQ07 12PB FXAQ P Judgment criteria FXEQ P Judgment criteria White Orange Brown Blue Red 1 2 3 4 5 6 7 FG Vsp Vcc GND Vdc Measuring points Criteria 1 4 1 Ω or more 2 4 1 Ω or more 3 4 1 Ω or more 7 4 1 Ω or more 1 White 2 Orange 3 Brown 4 Blue 5 6 7 Red 8 FG Vsp Vcc GND Vdc Measuring points Criteria 2 5 1 Ω or more 3 5 1 Ω or more 4 5 1 Ω or more 8 5 1 Ω or more ...

Page 445: ...at the values are balanced within the range of 20 while connector or relay connector is disconnected Furthermore to use a multimeter for measurement connect the probe of negative pole to Vcc and that of positive pole to GND Gray 5 Pink 4 Orange 3 Blue 2 Yellow 1 GND Vcc Hw HV HU Measuring points Criteria 5 4 1 Ω or more 5 3 1 Ω or more 5 2 1 Ω or more 5 1 1 Ω or more Measure the resistance values ...

Page 446: ...ue is within the range listed in the table below Determine the type according to the connector wire color and measure the resistance Outdoor unit Y1E Y3E Y4E Y7E Measuring points Judgment criteria Y1E Y3E Y4E 1 6 120 180 Ω 35 55 Ω 2 6 3 6 4 6 Measuring points Judgment criteria 1 5 120 180 Ω 2 5 3 5 4 5 White 1 Yellow 2 Orange 3 Blue 4 5 Red 6 White 1 Yellow 2 Orange 3 Blue 4 Red 5 ...

Page 447: ... FXAQ P Measuring points Judgment criteria 1 6 35 55 Ω 2 6 3 6 4 6 Orange 1 Red 2 Yellow 3 Black 4 5 Gray 6 Measuring points Judgment criteria 1 6 35 55 Ω 2 6 3 6 4 6 Measuring points Judgment criteria 1 3 300 Ω 1 5 150 Ω 2 4 300 Ω 2 6 150 Ω Orange 1 Red 2 Yellow 3 Black 4 5 Gray 6 White 1 Yellow 2 Orange 3 Blue 4 Red 5 Brown 6 ...

Page 448: ...Ω 1 5 150 Ω 2 4 300 Ω 2 6 150 Ω Orange White Yellow Red 1 2 5 Brown Blue 3 6 4 Measuring points Judgment criteria 1 6 35 55 Ω 2 6 3 6 4 6 2 Yellow 4 Blue f2 f4 White 1 Red 6 5 Orange 3 f1 f3 M White 1 Yellow 2 Orange 3 Blue 4 5 Red 6 Measuring points Judgment criteria 1 6 120 180 Ω 2 6 3 6 4 6 f2 f4 White 1 2 Yellow 4 Blue 5 White 1 Yellow 2 Orange 3 Blue 4 5 Red 6 Red 6 Orange 3 f1 f3 M ...

Page 449: ...pair or replace as needed 3 Check motor control harness Ensure wires are continuous and make good contact when seated in the connectors Repair or replace as needed 4 Check blower wheel Confirm wheel is properly seated on motor shaft Set screw must be on shaft flat and torqued to 165 in lbs minimum Confirm wheel has no broken or loose blades Repair or replace as needed 5 Ensure motor and wheel turn...

Page 450: ...C to UltraCheck EZTM tool If 24VAC is confirmed diagnostic tool is inoperable ON Blinking Rotating Motor and control end bell are functioning properly ON OFF Rotating Replace motor control end bell ON Blinking Not Rotating Check motor refer to Motor Checks on page 445 ON OFF Not Rotating Replace motor control end bell verify motor refer to Motor Checks on page 445 9 Depress the orange power button...

Page 451: ...ler or modular 2 Check voltage between pins on the 4 wire motor control harness between the motor and control board 3 Voltage on pins should read Pins 1 to 4 3 3vdc Pins 1 to 2 3 3vdc Pins 3 to 4 15vdc 1 Disconnect power to air handler or modular blower NOTE Motor contains capacitors that can hold a charge for several minutes after disconnecting power Wait 5 minutes after removing power to allow c...

Page 452: ...ell in reverse of disassembly Replace blower assembly into air handler or modular blower 1 Disconnect power to air handler or modular blower NOTE Motor contains capacitors that can hold a charge for several minutes after disconnecting power Wait 5 minutes after removing power to allow capacitors to discharge 2 Disassemble motor as described in steps 2 through 4 above 3 Locate the 3 circuit harness...

Page 453: ...SiUS371901EB Part 7 Appendix 446 1 Wiring Diagrams 447 1 1 Outdoor Unit 447 1 2 Indoor Unit 452 1 3 Air Treatment Equipment 466 1 4 Branch Selector Unit 469 Part 7 Appendix ...

Page 454: ...Wiring Diagrams SiUS371901EB 447 Part 7 Appendix 1 Wiring Diagrams 1 1 Outdoor Unit REYQ72 96 120XATJU REYQ72 96 120XATJA 2D119205B ...

Page 455: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 448 REYQ144 168XATJU REYQ144 168XATJA 2D119206B ...

Page 456: ...Wiring Diagrams SiUS371901EB 449 Part 7 Appendix REYQ72 96 120XAYDU REYQ72 96 120XAYDA 2D119207C ...

Page 457: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 450 REYQ144 168XAYDU REYQ144 168XAYDA 2D119208C ...

Page 458: ...Wiring Diagrams SiUS371901EB 451 Part 7 Appendix REYQ72 96 120 144 168XAYCU REYQ72 96 120 144 168XAYCA 2D119209B ...

Page 459: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 452 1 2 Indoor Unit FXFQ07 09 12 15 18 24 30 36 48TVJU 3D086460B ...

Page 460: ...Wiring Diagrams SiUS371901EB 453 Part 7 Appendix BYCQ125BGW1 Self Cleaning Decoration Panel for FXFQ TVJU 3D076375A ...

Page 461: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 454 FXZQ05 07 09 12 15 18TAVJU 3D110443A ...

Page 462: ...ING CENTRAL REMOTE CONTROLLER CONNECT IT TO THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL 3 IN CASE OF MAIN SUB CHANGEOVER SEE THE INSTALLATION MANUAL ATTACHED TO REMOTE CONTROLLER 4 SYMBOLS SHOW AS FOLLOWS BLK BLACK RED RED BLU BLUE WHT WHITE YLW YELLOW GRN GREEN ORG ORANGE BRN BROWN PNK PINK 5 WHEN CONNECTING THE INPUT WIRING FROM OUTSIDE FORCED OFF OR ON OFF CONTROL OPERATION CAN...

Page 463: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 456 FXEQ07 09 12 15 18 24PVJU 3D098557A ...

Page 464: ...Wiring Diagrams SiUS371901EB 457 Part 7 Appendix FXDQ07 09 12 18 24MVJU C 3D050501C ...

Page 465: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 458 FXSQ05 07 09 12 15 18 24 30 36 48 54TAVJU C 3D110467C ...

Page 466: ...Wiring Diagrams SiUS371901EB 459 Part 7 Appendix FXMQ07 09 12 15 18 24 30 36 48 54PBVJU 3D093209B ...

Page 467: ...MINAL 2 FIELD WIRING 3 IN CASE USING CENTRAL REMOTE CONTROLLER CONNECT IT TO THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL 4 WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE FORCED OFF OR ON OFF CONTROL OPERATION CAN BE SELECTED BY REMOTE CONTROLLER IN DETAILS REFER TO THE INSTALLATION MANUAL ATTACHED THE UNIT 5 SYMBOLS SHOW AS FOLLOWS PNK PINK WHT WHITE YLW YELLOW ORG ORANGE BLU BLUE B...

Page 468: ...Wiring Diagrams SiUS371901EB 461 Part 7 Appendix FXHQ12 24 36MVJU 3D048116C ...

Page 469: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 462 FXAQ07 09 12 18 24PVJU 3D075354F ...

Page 470: ...CONNECT IT TO THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL 4 WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE FORCED OFF OR ON OFF CONTROL OPERATION CAN BE SELECTED BY REMOTE CONTROLLER IN DETAILS REFER TO THE INSTALLATION MANUAL ATTACHED TO THE UNIT 5 SYMBOLS SHOW AS FOLLOWS PNK PINK WHT WHITE YLW YELLOW ORG ORANGE BLU BLUE BLK BLACK RED RED BRN BROWN GRN GREEN 6 USE COPPER CONDUCTORS...

Page 471: ...HIGH VOLTAGE FIELD JUNCTION TERMINAL PLUG CONNECTION EQUIPMENT GND FIELD GROUND X1A X3A X38A BS1 X12A X13A HAP X8A INDOOR UNIT PCB THERMISTOR HEAT EXCHANGER 1 2 MPU MULTI TENANT OPTION EEV COIL M K1R K3R TB6 TB8 K2R HEATER KIT OUTPUT LEARN PS TB5 TB4 ACC OUT RELAY OUT 4 3 6 5 9 8 7 10 11 12 RD BK RD BK WH BR BL BL RD FLASH WRITER OR GY RD YL BK PU YL SEE NOTE 5 TO HEATER KIT BK GR GROUND LUG CONNE...

Page 472: ...NCTION TERMINAL PLUG CONNECTION EQUIPMENT GND FIELD GROUND X3A X38A BS1 X12A X13A HAP X8A INDOOR UNIT PCB THERMISTOR HEAT EXCHANGER 1 2 MPU EEV COIL M K3R TB6 TB8 LEARN PS TB5 TB4 ACC OUT RELAY OUT FLASH WRITER GR RD H2P COM STAT H3P RX DATA DS1 WIRING ADAPTER PCB OPTION REMOTE SENSOR OPTION X4A X35A X23A CAPA CITY SETTING X1M X2M F1 T1 P2 P1 T2 F2 1 2 R C ECONOMIZER OPTION HUMIDIFIER OPTION AIR C...

Page 473: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 466 1 3 Air Treatment Equipment 1 3 1 Outdoor Air Processing Unit FXMQ48 72 96MFVJU 3D065426D ...

Page 474: ...Wiring Diagrams SiUS371901EB 467 Part 7 Appendix 1 3 2 Energy Recovery Ventilator VAM Series VAM300 470 600GVJU 3D073269D ...

Page 475: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 468 VAM1200GVJU 3D073270D ...

Page 476: ...Wiring Diagrams SiUS371901EB 469 Part 7 Appendix 1 4 Branch Selector Unit 1 4 1 Single Branch Selector Unit BSQ36 60 96TVJ 3D089521B ...

Page 477: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 470 1 4 2 Multi Branch Selector Unit Standard Series BS4Q54TVJ 3D089123B ...

Page 478: ...Wiring Diagrams SiUS371901EB 471 Part 7 Appendix BS6 8Q54TVJ 2D089122B ...

Page 479: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 472 BS10 12Q54TVJ 2D089121B ...

Page 480: ...Wiring Diagrams SiUS371901EB 473 Part 7 Appendix 1 4 3 Multi Branch Selector Unit Flex Series BSF4Q54TVJ 3D123904A ...

Page 481: ...SiUS371901EB Wiring Diagrams Part 7 Appendix 474 BSF6 8Q54TVJ 2D123905A ...

Page 482: ...local legislation z Ask a qualified installer or contractor to install this product Do not try to install the product yourself 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 par...

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