Gree GMV-450WM/B-X - Page 170

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
167
(7) Low voltage protection for the DC bus of the variable-frequency compressor's drive board (ODU fault
PL)
(8) Variable-frequency compressor starting failure (ODU fault PJ)
Yes
No
PL
Check if the voltage of the
whole system's input power
cable is lower than 320V.
Complete
Elevate the voltage of
the input power cable
to 380 V.
The compressor's drive
board is faulty and needs to
be replaced.
No
No
PJ
Restart the system five
minutes after shutting down it
to see if the failure is solved.
Complete
Reconnect the
compressor's UVW
cable.
Check if the compressor's
UVW cable is connected
properly.
Replace the compressor's
drive board to see if the
failure is solved.
The compressor is faulty
and needs to be replaced.
Yes
No