GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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Error judgment condition and method:
If the mainboard detects that input power cord voltage is lower than 320V, it will report low voltage
protection.
Possible reason：
■Power supply voltage is lower than 320V;
■Compressor drive board is abnormal.
Troubleshooting:
2.2.4.130 “PJ” Inverter compressor startup failure
Error display:
ODU mainboard will display
Check the error code on nixie tube of ODU main control board. If PJ is displayed, it indicates
inverter compressor startup failure
■Poor contact of compressor UVW wire;
■Compressor is broken;
■Compressor drive board is broken;
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