GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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2.2.4.86 “HL” Fan drive DC bus low voltage 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 HL is displayed, it indicates fan
drive DC bus low voltage protection
Possible reason：
■Power supply voltage is lower than 320V;
■Fan drive board is abnormal.
Troubleshooting:
2.2.4.87 “HJ” Failure startup of inverter fan
Error display:
ODU mainboard will display
Error judgment condition and method:
Check the error code on nixie tube of ODU main control board. If HJ is displayed, it indicates Failure
startup of inverter fan
Possible reason：
■Poor contact of fan UVW wire
■Fan is broken
■Fan blade is blocked (Fan blade is blocked and motor shaft is rusty)
■Fan drive board is abnormal
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