Gree GMV6 DC Inverter VRF Units Service Manual
2.131 "P7" Abnormal Temperature Sensor of Compressor Drive
Board
Fault display: main board of outdoor unit displays
Fault diagnosis:
If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is P7, it
indicates the abnormal temperature sensor of compressor drive board.
Possible causes:
■ The compressor drive board operates improperly.
Troubleshooting:
"P7" Abn ormal
Temperature Sen sor of
Compressor Drive Board
Is th e p roblem solve d after
the unit is powered off and powered on for
more than thr ee times?
The compr essor drive boar d
operate s improperly
No
Replace th e compressor drive
board
Yes
2.132 "P8" IPM Over Temperature Protection for Compressor Drive
Board
Fault display: main board of outdoor unit displays
Fault diagnosis:
If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is P8, it
indicates the IPM over temperature protection for the compressor drive.
Possible causes:
■ The IPM module's screws are not tightened;
■ The IPM module is not covered, or unevenly covered by thermal grease, or covered by dried
thermal grease;
■ The compressor drive board operates improperly.
Troubleshooting:
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