Gree GMVVQ1015WM/C-X, Service Manual

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Gree GMV6 HR DC Inverter VRF Units Service Manual
197
“o7” IDU non-synchronism
protection
Fan drive board is
abnormal Replace the fan drive
board
No
Check if the contact of U, V and W
wire of indoor fan is good
Yes
No
Replace the fan
Check is the resistance among winding
of each indoor fan phase equal? Is the insulation
against ground of winding of each fan phase normal
(normal value is over 2m
Ω
)?
Clear the foreign objects
Check if the fan is blocked
due to foreign objects or the motor
shaft is rusty?
The fan is damaged, please
replace the fan
Other errors occur at the same
time? e.g. the IPM module protection
(o3)
Yes
Yes
Yes
Yes
Yes
2.148 “o8” IDU drive communication error
Error display: ODU main board and IDU wired controller will display
Applicable model: external drive DC fan
Error judgment condition and method:
If the drive does not receive main control data in 30 consecutive seconds, it will report communication error.
Possible reasons:
■
Poor contact between drive board and main control board communication terminal
■
Circuit is abnormal
Troubleshooting: