Gree GMV-450WM/B-X - Page 167

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
164
(2) Faults in the IPM temperature sensor of the variable-frequency compressor's drive board (IDU fault
P7), current detection circuit (ODU fault PC), drive module reset protection (ODU fault P3) and
out-of-step protection (ODU fault P9)
(3) Variable-frequency compressor over-current protection (ODU fault P5) and IPM module protection
faults (ODU fault P6)
P3, P7, P9 or PC
Check if the fault is solved
after turning on the system
for three times
The compressor's drive
board is faulty and needs to
be replaced.
Complete
No
No
Yes
Yes
No
Replace the compressor's
drive board
Connect the compressor's
UVW cable properly.
P5 or P6
Check if the IPM module is
damaged according to the method
mentioned in Attachment 3.3.
Check if the compressor's
UVW cable connects well.
Is the fault solved after
the compressor's drive
board is replaced?
Complete
No
The compressor is faulty
and needs to be
replaced.