GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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compressor drive board can be judged according to the error code on main control board. Then arrange
troubleshooting accordingly.
Possible reason：
■Inverter compressor overcurrent protection (P5 is displayed on the nixie tube of ODU main control
board)
■Compressor drive IPM module protection (P6 is displayed on the nixie tube of ODU main control
board)
■Compressor drive communication error (C2 is displayed on the nixie tube of ODU main control
board)
Troubleshooting:
Find out corresponding solution according to the error code displayed on ODU mainboard.
2.2.4.120 “P2” Voltage protection of driving board power of compressor
Error display:
IDU wired controller will display
Error judgment condition and method:
Check error code through IDU wired controller. If IDU wired controller displays P2, please also
check the error code displayed on the nixie tube of ODU main control board. Detailed error of
compressor drive board can be judged according to the error code on main control board. Then arrange
troubleshooting accordingly.
Possible reason：
■High voltage protection of compressor drive DC bus (PH is displayed on the nixie tube of ODU
main control board)
■Low voltage protection of compressor drive DC bus (PL is displayed on the nixie tube of ODU main
control board)
Troubleshooting:
Find out corresponding solution according to the error code displayed on ODU mainboard.
2.2.4.121 “P3” Compressor drive module reset protection
Error display:
ODU mainboard will display
Error judgment condition and method:
Check the error code on nixie tube of ODU main control board. If P3 is displayed, it indicates
compressor drive board module reset protection
Possible reason：
■Compressor drive board is abnormal
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