Gree GMV6 DC Inverter VRF Units Service Manual
2.87 "HC" Current Detection Circuit Fault of Fan 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 HC, it
indicates the current detection circuit fault of fan drive.
Possible causes:
■ The fan drive board operates improperly.
Troubleshooting:
"HC" Curren t De tection
Circuit Fault of Fa n Drive
The fan drive boa rd is
abnormal
Yes
Replace th e fan drive board
No
If the p roblem resolved after
the unit is powered off and then powered
on for more than three time s?
2.88 "HH" Over Voltage Protection for DC Bus of Fan 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 HH, it
indicates the over voltage protection for the DC bus of fan drive.
Possible causes:
■ The unit's input power cable has a voltage exceeding 460V;
■ The fan drive board operates improperly.
Troubleshooting:
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