Gree GMV6 DC Inverter VRF Units Service Manual
"PH" Over Voltage
Protection for the DC Bus
of Compressor Driver
The compressor drive
board operates improperly
Yes
Whether the input voltage of the
unit exceeds 460V?
No
Replace the compressor
drive board
Yes
Change the voltage to
380V
2.136 "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:
"PL" Under Voltage
Protection for the DC Bus
of Compressor Driver
The compressor drive
board operates improperly
Yes
Whether the input voltage of the
unit falls below 320V?
No
Replace the compressor
drive board
Yes
Change the voltage to
380V
2.137 "PJ" Inverter Compressor Startup Failure
Fault display: main board of outdoor unit displays
Fault diagnosis:
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