GREE DC INVERTER HEAT PUMP CONDENSING UNIT SERVICE MANUAL
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Troubleshooting
：
NOTE
:
Please refer to Appendix 1 for the relation between temperature and resistance of temperature sensor.
3.4.13 “H3” Compressor overload protection
Error display: ODU mainboard, IDU wired control and IDU receiver light board will display H3
Error judgment condition and method:
When the mainboard’s interface ovc-comp is broken off for 3s, error H3 will be reported.
Possible reason:
■The interface ovc-comp is not short-circuited.
■ODU mainboard is damaged.
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