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Ⅲ. Troubleshooting
1. Error code list
1.1 Indoor unit
Room temperature (T1) sensor fault
Defrost, running, alarm light flashes
Evaporator temperature (T2)sensor fault
Evaporator outlet temperature (T2B) sensor fault
Running, defrost light flashes
Communication failure between IDU and wired
controller
Running, timer light flashes
Defrost, timer light flashes
Indoor unit fan motor stall protection
Defrost, alarm light flashes
Ambient temperature (T4) sensor fault
Discharge temperature (T5) sensor fault
Outdoor unit fan motor protection
Other outdoor unit errors
Outdoor unit EEPROM error
Condenser temperature (T3) sensor fault
High condenser temperature protection
DC bus low voltage protection
Secondary over-current protection
Three times high discharge temperature
protection
Three times low pressure protection