Gree GMV6 DC Inverter VRF Units Service Manual
2.134 "PC" Current Detection Circuit Fault of Compressor Drive
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 PC, it
indicates the current detection circuit fault of compressor drive.
Possible causes:
■ The compressor drive board operates improperly.
Troubleshooting:
"PC" Current Detection
Circuit Fault of Co mp ressor
Driver
Is th e problem
resolved after the unit is powered off
and then powered o n for more tha n
three times?
The compr essor drive boar d
operates improperly
No
Replace the compressor
drive board
Yes
2.135 "PH" Over Voltage Protection for DC Bus of Compressor
Drive
Fault display: main board of outdoor unit displays
Fault diagnosis:
When the input power cable of the main board has a voltage over 460 V, the unit triggers protection
against faults.
Possible causes:
■ The unit's input power cable has a voltage exceeding 460 V;
■ The compressor drive board operates improperly.
Troubleshooting:
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