GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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2.2.4.84 “HC” AC input voltage of drive 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 HC is displayed, it indicates AC
input voltage of drive of inverter fan
Possible reason：
■Fan drive board is abnormal
Troubleshooting:
2.2.4.85”HH” fan drive DC bus high 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 HH is displayed, it indicates fan
drive DC bus high voltage protection
Possible reason：
■Power supply voltage is higher than 460V;
■Fan drive board is abnormal.
Troubleshooting:
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