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 board is
abnormal
Yes
Replace the fan drive board
No
Is the problem solved after
the fan drive board is powered off and
then powered on for more than
three times?
No
Yes
Compressor drive board is
abnormal. Replace it
Whether P3 is displayed at
the same time (reset the compressor
drive board)?
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