Carrier Error Codes

Indoor-outdoor unit communication error

Indoor unit coil temperature sensor (T2) fault

Outdoor unit ambient temperature sensor (T4) fault

High pressure protection activated

Low pressure protection / overcurrent protection

Outdoor unit communication error

Inverter drive module (IPM) fault

Indoor unit fan motor fault

Compressor discharge line high temperature protection

Defrost temperature sensor fault

Outdoor unit heat exchanger temperature sensor fault

Compressor overload / high temperature protection

Compressor operating limit exceeded / low temperature protection

IPM (Intelligent Power Module) protection activated

Outdoor unit fan motor rotation fault

Voltage protection (high or low voltage)

High discharge temperature protection

Overcurrent protection (drive circuit)

Compressor overcurrent protection

Refrigerant shortage / low refrigerant pressure detected