Carrier Error Codes
20 error codes for Carrier AC units. Description, severity level and solution steps for each code.
Indoor-outdoor unit communication error
View CodesIndoor unit coil temperature sensor (T2) fault
View CodesOutdoor unit ambient temperature sensor (T4) fault
View CodesHigh pressure protection activated
View CodesLow pressure protection / overcurrent protection
View CodesOutdoor unit communication error
View CodesInverter drive module (IPM) fault
View CodesIndoor unit fan motor fault
View CodesCompressor discharge line high temperature protection
View CodesDefrost temperature sensor fault
View CodesOutdoor unit heat exchanger temperature sensor fault
View CodesCompressor overload / high temperature protection
View CodesCompressor operating limit exceeded / low temperature protection
View CodesIPM (Intelligent Power Module) protection activated
View CodesOutdoor unit fan motor rotation fault
View CodesVoltage protection (high or low voltage)
View CodesHigh discharge temperature protection
View CodesOvercurrent protection (drive circuit)
View CodesCompressor overcurrent protection
View CodesRefrigerant shortage / low refrigerant pressure detected
View Codes