Gree GMV-VQ680WM/C-X Service Manual page 210

Gree
Pro tection for the DC Bus
Whether th e i nput voltage of the
boa rd o perates impr operly
2.161 "PL" Under Voltage Protection for DC Bus of Compressor
Drive
Fault display: main board of outdoor unit displays
Applicable models: GMV6, GMV5, GMV5S series
Fault diagnosis:
When the input power cable of the main board has a voltage below 320 V, the unit triggers
protection against faults.
Possible causes:
■ The unit's input power cable has a voltage below 320V;
■ The compressor drive board operates improperly.
Troubleshooting:
Pro tection for the DC Bus
Whether th e i nput voltage of the
boa rd o perates impr operly
2.162 "PJ" Inverter Compressor Startup Failure
Fault display: main board of outdoor unit displays
Fault diagnosis:
"PH" Over Voltage
of Compre ssor Drive r
unit excee ds 460V?
No
The co mpr essor drive
"PL" Under Vol tage
of Compre ssor Drive r
unit fall s below 320V?
No
The co mpr essor drive
GMV6 HR DC Inverter VRF Units Service Manual
Yes
Chang e the volta ge to
Yes
Replace th e compre ssor
drive boar d
Yes
Chang e the volta ge to
Yes
Replace th e compre ssor
drive boar d
208
380V
380V