Gree GMV-1015WM/G-U, Service Manual

Page: 184 / 331

Gree GMV6 DC Inverter VRF Units Service Manual
182
2.151 "P1" Malfunctioning Compressor Drive Board
Fault display: wired controller of indoor unit displays
Fault diagnosis:
If the fault code displayed on the wired controller of the indoor unit is P1, check the fault code
displayed on the 2-digit digital LED of the main control board of the outdoor unit, based on which you are
able to identify the specific fault of the compressor drive board. Then, troubleshoot the fault according to
the corresponding troubleshooting methods.
Possible causes:
■ Inverter compressor over -current protection (2-digit digital LED of the main control board of the
outdoor unit displays P5);
■ IPM module protection for the compressor d rive (2-digit digital LED of the main control board of
the outdoor unit displays P6);
■ Communication fault of compressor drive (2 -digit digital LED of the main control board of the
outdoor unit displays C2).
Troubleshooting: based on the faults displayed on the main board of the outdoor unit.
2.152 "P2" Input Voltage Protection for the Compressor Drive
Board
Fault display: wired controller of indoor unit displays
Fault diagnosis:
If fault code displayed on the wired controller of the indoor unit is P2, check the fault code displayed
on the 2-digit digital LED of the main control board of the outdoor unit, based on which you are able to
identify the specific fault of the compressor drive board. Then, troubleshoot the fault according to the
corresponding troubleshooting methods.
Possible causes:
■ Over voltage protection for the DC bus of compressor drive (2 -digit digital LED of the main control
board of the outdoor unit displays PH);
■ Under voltage protection for the DC bus of compressor drive (2 -digit digital LED of the main control
board of the outdoor unit displays PL).
Troubleshooting: based on the faults displayed on the main board of the outdoor unit.
2.153 "P3" Reset Protection for the Compressor Drive Module
Fault display: main board of outdoor unit displays
Fault diagnosis:
If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is P3, it
indicates the reset protection for the compressor drive board.
Possible causes:
■ The compressor drive operates improper ly