Gree GMV-VQ680WM/C-X Service Manual page 171

Gree
2.107 "HJ" Inverter Fan Startup Failure
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 HJ, it
indicates the inverter fan startup failure.
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
are stu ck d ue to foreign matter s or rustin g
occurred at the same time (for example,
over-current protection (H5), IPM module
protection (H6), loss of synchronization
"HJ" Inve rte r Fan Startup
Failure
wires a re con nected pro perly?
Yes
Whether the resistance between
than 2 megohms)?
Yes
Whether blad es
of motor sh aft
?
Yes
Have other faults
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
169
Replace th e fan