Gree GMV6 DC Inverter VRF Units Service Manual
2.124 "nF" Fan Type Unit
Fault display: main board of outdoor unit displays
Fault diagnosis:
The code indicates that the indoor unit only operates in fan mode.
Possible causes: --
Troubleshooting: not required.
2.125 "P0" Compressor Drive Board Fault
Fault display: wired controller of indoor unit displays
Fault diagnosis: If the fault code displayed on the wired controller of the indoor unit is PO, check
the fault code displayed on the 2-digit digital LED of the main control board of the outdoor unit, based on
which you are able to identify the specific fault of the compressor drive board. Then, troubleshoot the fault
according to the corresponding troubleshooting methods.
Possible causes:
■ Compressor drive module reset protection (2-digit digital LED of the main control board of the
outdoor unit displays P3);
■ Temperature sensor fault of compressor drive (2-digit digital LED of the main control board of the
outdoor unit displays P7);
■ IPM over temperature protection for the compressor drive (2-digit digital LED of the main control
board of the outdoor unit displays P8);
■ Current detection circuit fault of compressor drive (2-digit digital LED of the main control board of
the outdoor unit displays PC);
■ Charging loop fault of compressor drive (2-digit digital LED of the main control board of the outdoor
unit displays PF);
■ Loss of synchronization protection for the inverter compressor (2-digit digital LED of the main
control board of the outdoor unit displays P9);
■ Inverter compressor startup failure (2-digit digital LED of the main control board of the outdoor unit
displays PJ).
Troubleshooting: based on the faults displayed on the main board of the outdoor unit.
2.126 "P1" Malfunctioning Compressor Drive Board
Fault display: wired controller of indoor unit displays
Fault diagnosis:
If the fault code displayed on the wired controller of the indoor unit is P1, check the fault code
displayed on the 2-digit digital LED of the main control board of the outdoor unit, based on which you are
able to identify the specific fault of the compressor drive board. Then, troubleshoot the fault according to
the corresponding troubleshooting methods.
Possible causes:
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