Gree GMV-VQ680WM/C-X Service Manual page 209

Gree
2.159 "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:
Circuit Fault o f Co mp ressor
resolved after the unit is powered off
and then powere d o n for more tha n
The co mpr essor drive boar d
2.160 "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:
"PC" Curren t De tection
Driver
Is th e p roblem
three ti mes?
No
ope rate s imprope rly
GMV6 HR DC Inverter VRF Units Service Manual
Yes
Replace th e compre ssor
207
drive boar d