Name: Daikin REYQ72
Brand: Daikin
Rating: 5 (1 reviews)

Default Chapter2

Part 1 General Information12

Part 2 Specifications16

Specifications17

Part 3 Refrigerant Circuit36

Part 4 Function48

Part 5 Test Operation84

Part 6 Troubleshooting122

Troubleshooting by Remote Controller125
- The INSPECTION / TEST Button125
- Self-Diagnosis by Wired Remote Controller126
- Self-Diagnosis by Wireless Remote Controller127
- Operation of the Remote Controller's Inspection / Test Operation Button130
- Remote Controller Service Mode131
- Remote Controller Self-Diagnosis Function133
- Malfunction Code Indication by Outdoor Unit Pcb136
- Troubleshooting136
Troubleshooting by Indication on the Remote Controller138
- A0" Indoor Unit: Error of External Protection Device138
- A1" Indoor Unit: PC Board Defect139
- A3" Indoor Unit: Malfunction of Drain Level Control System (S1L)140
- A6" Indoor Unit: Fan Motor (M1F) Lock, Overload142
- Fan Motor (M1F) Lock, Overload142
- A7" Indoor Unit: Malfunction of Swing Flap Motor (MA)143
- A9" Indoor Unit: Malfunction of Moving Part of145
- Malfunction of Moving Part of Electronic Expansion Valve (20E)145
- Electronic Expansion Valve (20E)145
- Expansion Valve (20E)145
- AF" Indoor Unit: Drain Level above Limit147
- AJ" Indoor Unit148
- Malfunction of Capacity Determination Device148
- AJ" Indoor Unit: Malfunction of Capacity Determination Device148
- C4" Indoor Unit: Malfunction of Thermistor (R2T)149
- For Heat Exchanger149
- C4" Indoor Unit: Malfunction of Thermistor (R2T) for149
- Heat Exchanger149
- For Gas Pipes150
  - C5" Indoor Unit: Malfunction of Thermistor (R31T, R32T) for Gas Pipes150
  - C9" Indoor Unit: Malfunction of Thermistor (R1T) for Suction Air151
  - CJ" Indoor Unit: Malfunction of Thermostat Sensor in152
- Remote Controller152
  - E1" Outdoor Unit: PC Board Defect153
  - E3" Outdoor Unit: Actuation of High Pressure Switch154
  - Actuation of Low Pressure Sensor155
  - E4" Outdoor Unit: Actuation of Low Pressure Sensor155
Compressor Motor Lock (INV Compressor)156
E5" Compressor Motor Lock (INV Compressor)156
E6" Compressor Motor Overcurrent/Lock (STD Compressor)157
Malfunction of Outdoor Unit Fan Motor158
E7" Malfunction of Outdoor Unit Fan Motor158
E9" Outdoor Unit: Malfunction of Moving Part of160
- Electronic Expansion Valve (Y1E, Y2E, Y3E)160
- 2.20 " F3 " Outdoor Unit162
  - Abnormal Discharge Pipe Temperature162
  - F3" Outdoor Unit: Abnormal Discharge Pipe Temperature162
Refrigerant Overcharged163
F6" Refrigerant Overcharged163
Abnormal Outdoor Fan Motor Signal164
H7" Abnormal Outdoor Fan Motor Signal164
2.23 " H9 " Outdoor Unit165
- Malfunction of Thermistor for Outdoor Air (R1T)165
- H9" Outdoor Unit: Malfunction of Thermistor for Outdoor Air (R1T)165
Current Sensor Malfunction166
J2" Current Sensor Malfunction166
- J3" Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R31~32T)167
- J4" Malfunction of Heat Exchanger Gas Pipe Thermistor (R81, 82T)168
  - J5" Outdoor Unit: Malfunction of Thermistor (R2T) for Suction Pipe169
  - J6" Outdoor Unit: Malfunction of Thermistor (R4T) for Outdoor Unit Heat Exchanger170
Malfunction of Receiver Outlet Liquid Pipe Thermistor (R6T)171
J7" Malfunction of Receiver Outlet Liquid Pipe Thermistor (R6T)171
Malfunction of Oil Equalizing Pipe Thermistor (R7T)172
J8" Malfunction of Oil Equalizing Pipe Thermistor (R7T)172
Malfunction of Sub-Cooling Heat Exchanger Gas Pipe Thermistor (R5T)173
- J9" Malfunction of Sub-Cooling Heat Exchanger Gas Pipe Thermistor (R5T)173
2.32 " JA " Outdoor Unit174
- Malfunction of Discharge Pipe Pressure Sensor174
- JA" Outdoor Unit: Malfunction of Discharge Pipe Pressure Sensor174
- 2.33 " JC " Outdoor Unit175
- Malfunction of Suction Pipe Pressure Sensor175
- JC" Outdoor Unit: Malfunction of Suction Pipe Pressure Sensor175
- L4" Outdoor Unit: Malfunction of Inverter Radiating Fin176
- Temperature Rise176
- L5" Outdoor Unit: Inverter Compressor Abnormal177
  - Inverter Compressor Abnormal177
  - Inverter Current Abnormal178
  - L8" Outdoor Unit: Inverter Current Abnormal178
  - Inverter Start up Error179
  - L9" Outdoor Unit: Inverter Start up Error179
- Inverter and Control PC Board180
  - And Control PC Board180
  - P1" Outdoor Unit: Inverter Over-Ripple Protection182
  - 2.40 " P4 " Outdoor Unit183
- Temperature Rise Sensor183
  - PC Board or Faulty Combination of PC Board184
  - PJ" Outdoor Unit: Faulty Field Setting after Replacing Main PC Board or Faulty Combination of PC Board184
  - Electronic Expansion Valve Failure185
  - Shortage or Electronic Expansion Valve Failure185
  - UO" Outdoor Unit: Low Pressure Drop Due to Refrigerant185
- Outdoor Unit: Reverse Phase, Open Phase186
- U1" Outdoor Unit: Reverse Phase, Open Phase186
- Outdoor Unit: Power Supply Insufficient or Instantaneous Failure187
- Instantaneous Failure187
- U3" Outdoor Unit: Check Operation Not Executed189
  - Check Operation Not Executed189
- Malfunction of Transmission between Indoor Units190
- U4" Malfunction of Transmission between Indoor Units190
  - Remote Controller and Indoor Unit192
  - U5" Indoor Unit: Malfunction of Transmission between192
  - Outdoor Units193
  - U7" Indoor Unit: Malfunction of Transmission between193
  - MAIN and SUB Remote Controllers195
  - U8" Indoor Unit: Malfunction of Transmission between195
  - 2.50 " U9 " Indoor Units196
  - Indoor Units and Outdoor Units in the same System196
- UA" Improper Combination of Indoor Units and198
- UA" Improper Combination of Indoor Units and Outdoor Units/Indoor Units and Remote Controller198
- Address Duplication of Centralized Remote Controller199
- UC" Address Duplication of Centralized Remote Controller199
- Malfunction of Transmission between Centralized Controller and Indoor Unit200
- Indoor Unit200
- System Is Not Set yet202
- UF" System Is Not Set yet202
- Malfunction of System, Refrigerant System Address Undefined203
- Refrigerant System Address Undefined203
Troubleshooting (OP: Central Remote Controller)205
- PC Board Defect205
- M1" PC Board Defect205
- Malfunction of Transmission between Optional Controllers for Centralized Control206
- Centralized Control206
- Improper Combination of Optional Controllers for Centralized Control207
- MA" Improper Combination of Optional Controllers for Centralized Control207
- Address Duplication, Improper Setting209
- MC" Address Duplication, Improper Setting209
Troubleshooting (OP: Schedule Timer)210
- Malfunction of Transmission between Centralized Controller and Indoor Unit210
- UE" Malfunction of Transmission between Centralized Controller and Indoor Unit210
- PC Board Defect212
- M1" PC Board Defect212
- Malfunction of Transmission between Optional Controllers for Centralized Control213
- Centralized Control213
- Improper Combination of Optional Controllerslers for Centralized Controllers214
- MA" Improper Combination of Optional Controllers for Centralized Control214
- Address Duplication, Improper Setting216
- MC" Address Duplication, Improper Setting216
Troubleshooting (OP: Unified ON/OFF Controller)217
- Operation Lamp Blinks217
- Display "Under Centralized Control" Blinks (Repeats Single Blink)219
- Display "Under Centralized Control" Blinks (Repeats Double Blink)222

Part 7 Replacement Procedure for INV Compressor226

Part 8 Appendix228

Part 9 Precautions for New Refrigerant (R-410A)256

Precautions for New Refrigerant (R-410A)257
- Outline257
- Service Tools259

Index266

M8" Malfunction of Transmission between Optional Controllers for Centralized Control266

Drawings & Flow Charts270

Brand	Daikin
Model	REYQ72
Category	Air Conditioner
Language	English

Daikin REYQ72 User Manual

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Daikin REYQ72 Specifications

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