Gree GMV-VQ680WM/C-X Service Manual page 201

Gree
board and external drive board to see if it is
2.150 "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.
"o9" IDU main control
communication error
Check the terminal between main
loose or any foreign objects inside?
否
No
Detecting circuit might be abnormal
Replace the main control board
and drive board in turn, then
replace it after confirming the
faulted board.
GMV6 HR DC Inverter VRF Units Service Manual
Yes
If it is loosened or there
are
retighten it after treatment
199
foreign objects,