Daikin ZQG71~140L7V1B User Manual

230 pages

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Service Manual

GQI-Eco Series

Heat Pump R-410A 50Hz

Smart RZQG71~140L7V1B

RZQG71~140L7Y1B

Classic RZQSG71~140L7V1B

RZQSG71~140L7Y1B

ESIE12-06

Service Manual1
Table of Contents3
Heat Pump3
Introduction7
- Safety Cautions7
- Used Icons11
- Preface12
Part 1 - General Information13
Model Names of Indoor / Outdoor Units14
Outlook Outdoor Units15
Part 2 - Functions18
Functions18
- Indoor Unit18
- Outdoor Unit18
Part 3 - Specifications19
Specifications20
Operation Range37
Part 4 - Remote Controller41
Wired Remote Controller42
- Applicable Models42
- Names and Functions42
- MAIN/SUB Setting When Using 2 Remote Controllers46
- Centralized Control Group No. Setting47
Wireless Remote Controller49
- Applicable Models49
- Names and Functions49
- MAIN/SUB Setting51
Service Mode52
- Brc1D52852
Inspection Mode54
- Brc1D52854
Part 5 - Function and Control55
Function of Main Components and Thermistors56
Operation Flow Chart58
- Cooling / Dry Operation58
- Heating Operation59
Function Details60
- Indoor Unit60
  - Dew Condensation Prevention Control62
  - Defrost Control63
- Outdoor Unit64
Part 6 - Field Setting83
Test Operation84
- Pre-Run Checks84
- Remote Controller Confirmation84
- Test Run85
- Precautions Regarding Test Run85
- Failure Diagnosis at the Moment of First Installation86
Field Setting from Remote Controller87
- Wired Remote Controller87
- Wireless Remote Controller90
- Settings Contents and Code No. for Indoor Units91
- Overview of the Field Setting on the Outdoor Units96
- Quiet (Low Noise) Operation97
- I-Demand Function99
- Setting for Low Humidity Application100
- Thermostat Control103
- Defrost Start Setting104
Field Setting from Outdoor Unit PCB105
- Location of DIP Switch and BS Button105
- Field Setting for Outdoor Unit106
- Troubleshooting115
Emergency Operation116
- Forced Operation116
Part 7 - Service Diagnosis119
Maintenance Inspection121
- Overview121
Symptom-Based Troubleshooting123
- Overview123
- Equipment Does Not Operate124
- Indoor Unit Fan Operates, but Compressor Does Not Operate126
- Cooling / Heating Operation Starts but Stops Immediately128
- After Unit Shuts Down, It Cannot be Restarted for a While129
- Equipment Operates but Does Not Provide Cooling131
- Equipment Operates but Does Not Provide Heating133
- Equipment Discharges White Mist135
- Equipment Produces Loud Noise or Vibration136
- Equipment Discharges Dust137
- Remote Controller LCD Displays "88138
- Swing Flap Does Not Operate139
Troubleshooting by LED Indications141
- Troubleshooting by LED on the Indoor Unit141
- Troubleshooting by LED on Outdoor Unit PCB141
Troubleshooting by Remote Controller142
- Procedure of Self-Diagnosis by Remote Controller142
- Error Codes and Description146
- Safety Devices147
- Indoor Unit PCB Abnormality148
- Drain Water Level System Abnormality149
- Indoor Unit Fan Motor Abnormality151
- Capacity Setting Abnormality152
- Transmission Error (between Indoor Unit PCB and Adaptor PCB)153
- Thermistor Abnormality155
- Humidity Sensor System Abnormality156
- Remote Controller Thermistor Abnormality157
- Outdoor Unit PCB Abnormality158
- High Pressure Abnormality (Detected by the High Pressure Switch)159
- Actuation of Pressure Sensor163
- Compressor Motor Lock165
- Outdoor Unit Fan Motor Abnormality166
- Electronic Expansion Valve Abnormality168
- Discharge Pipe Temperature Control171
- High Pressure Switch System Abnormality173
- Thermistor System Abnormality174
- Outdoor Unit PCB Abnormality175
- Radiation Fin Temperature Rise177
- Output Overcurrent Detection179
- Electronic Thermal (Time Lag)181
- Stall Prevention (Time Lag)183
- Transmission System Abnormality (between Control and Inverter PCB)185
- Open Phase or Power Supply Voltage Imbalance186
- Defective Capacity Setting187
- Refrigerant Shortage (Alert)188
- Refrigerant Shortage (Error)189
- Power Supply Voltage Abnormality191
- Transmission Error between Indoor and Outdoor Unit193
- Transmission Error between Remote Controller and Indoor Unit196
- Transmission Error between MAIN Remote Controller and SUB Remote Controller197
- Field Setting Switch Abnormality198
- UC" Address Duplication of Centralized Controller200
- Transmission Error between Centralized Controller and Indoor Unit201
- Transmission Error between Indoor and Outdoor Unit / Piping and Wiring Mismatch / Refrigerant Shortage203
- Check205
Part 8 - Appendix217
Piping Diagrams218
- Rzqg71L218
- Rzqg100-140L218
Wiring Diagrams219
- Indoor Unit219
- Outdoor Unit220
Precautions for New Refrigerant (R-410A)221
- Outline221
- Refrigerant Cylinders223
- Service Tools224

Questions and Answers:

J
John OwenAug 14, 2025
What to do if my Daikin Heat Pump shows a gas shortage error (Factor 1)?
- M
  Michael SaundersAug 14, 2025
  If your Daikin Heat Pump displays a gas shortage error (Factor 1), it indicates a refrigerant leak. Recharge the refrigerant to the normal level to resolve this issue.
T
Troy ParkerAug 17, 2025
What to do if Daikin ZQG71~140L7V1B detects multiple master units?
- B
  Bailey WatsonAug 17, 2025
  If your Daikin Heat Pump is showing multiple master units detected, it means more than one indoor unit has a remote controller connected. To fix this, ensure that only one indoor unit is connected to the remote controller.