Gree GMV6 DC Inverter VRF Units Service Manual
2.81 "H3" Reset Protection for the Fan Drive Module
Fault display: wired controller of indoor unit displays
Fault diagnosis:
If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is H3, it
indicates the reset protection for the fan drive board.
Possible causes:
■ The fan drive board operates improperly
Troubleshooting:
"H3" Reset Protection for
the Fan Drive Module
The fan drive boa rd is
abnormal
Yes
Replace th e fan drive board
No
Is th e problem so lve d after
the fan drive board is powered off an d
then powered on for more than
three ti mes?
No
Yes
Compressor d rive bo ard is
abnormal. Replace it
Whether P3 is displayed at
the same time (reset the compresso r
drive board)?
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