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GREE
Troubleshooting:
2.2.4.82 "H8" Fan drive IPM high temperature 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 H8 is displayed, it indicates fan
drive IPM high temperature protection
Possible reason：
■Thermal grease of IPM module hasn't been spread or thermal grease is not spread evenly or
thermal grease is dry;
■Screw of IPM module is not tightened;
■Fan drive board is abnormal
Troubleshooting:
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
198
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