Gree GMV-VQ680WM/C-X Service Manual page 163

Gree
2.98 "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
Is th e p roblem so lve d after
the fan dri ve boa rd is powered off an d
then powered on for mo re than
Whether P3 is d ispl aye d a t
the same time (reset the compresso r
the Fan Drive Mo dule
three ti mes?
No
drive boar d)?
No
The fan dr ive boa rd is
abn ormal
GMV6 HR DC Inverter VRF Units Service Manual
Yes
Compressor d rive bo ard is
abn ormal. Replace it
Yes
Replace th e fan drive board
161