Gree GMV-450WM/B-X - Page 169

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
166
(5) Recharging circuit faulty of the variable-frequency compressor drive board (ODU fault PF)
(6) High voltage protection for the DC bus of the variable-frequency compressor's drive board (ODU fault
PH)
No
Yes
PF
Check if the voltage of the
whole system's input power
cable reaches 280V.
Complete
Elevate the voltage of
the input power cable
to 380V.
The compressor drive board
is faulty and needs to be
replaced.
Yes
No
PH
Check if the voltage of the
whole system's input power
cable exceeds 460 V.0V.
Complete
Lower the voltage of
the input power cable
to 380 V.
The compressor's drive
board is faulty and needs to
be replaced.