Gree GMV-VQ680WM/C-X Service Manual page 164

Gree
2.99 "H5" Inverter Fan Over-current Protection
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 H5, it
indicates the over-current protection for the inverter fan.
Possible causes:
■ Poor contact of fan's UVW cables;
■ The fan is damaged;
■ The blades are stuck (the blades are blocked or the motor shaft gets rusty);
■ The fan drive board operates improperly.
Troubleshooting:
Whether th e U, V and W p hases of fan
the windings of each phase for the fan is normal
(generally less than 10 ohms)? Whether the resistance values are
equal to each other? Is grounding insulation of the phase
windings of the fan normal (generally greater
occurred at the same time (for e xa mpl e,
fan startup fai lure (HJ), IPM modu le p rote ction
"H5" Inve rte r Fan
Over-current Protection
wires a re con nected pro perly?
Yes
Whether the resistance between
than 2 megohms)?
Yes
Whether blad es are stuck
due to fore ign ma tters o r ru sting
of motor sh aft?
Yes
Have o the r faults
(H6) and loss o f synchron iza tion
for fan (H9))?
No
The fan dr ive boa rd is
abn ormal
GMV6 HR DC Inverter VRF Units Service Manual
No
Yes
Remove forei gn matters
Yes
Replace th e faulty fan
Yes
Replace th e fan drive board
162
Replace th e fan