Currently, one of the most popular air conditioning brands on the market is Carrier AC. Many homes have it since it is so well-liked. The faults that occur from time to time with air conditioners need to be fixed. Users need to keep an eye out for the fault codes specific to Carrier AC. Users that have a particular issue might also benefit from learning the error codes. Many users are interested in learning more about Carrier AC trouble codes.
Carrier AC error codes
Here are some common error codes that you may encounter with Carrier air conditioners. Please note that error codes can vary depending on the specific model and series of your Carrier AC unit. It’s always recommended to refer to your unit’s manual or contact a certified technician for accurate diagnosis and troubleshooting.
- E1: Communication error between the indoor and outdoor units.
- E2: High-pressure protection or abnormal compressor discharge temperature.
- E3: Low-pressure protection or abnormal compressor suction temperature.
- E4: Outdoor unit anti-freezing protection or abnormal outdoor temperature.
- E5: Overcurrent protection or abnormal compressor current.
- E6: Open circuit or short circuit of the outdoor fan motor.
- E7: Outdoor fan motor lock or phase current imbalance.
- E8: Indoor fan motor lock or phase current imbalance.
- E9: Malfunction of the room temperature sensor.
- E10: Malfunction of the evaporator temperature sensor.
- E11: Malfunction of the condenser temperature sensor.
- E12: Malfunction of the outdoor ambient temperature sensor.
- E13: Malfunction of the EEPROM (Electrically Erasable Programmable Read-Only Memory).
- E14: Malfunction of the IPM module (Intelligent Power Module) or compressor lock.
- E15: Malfunction of the outdoor unit EEPROM or compressor overcurrent.
- E16: Malfunction of the outdoor unit address duplication or compressor phase current imbalance.
- E17: Malfunction of the indoor unit EEPROM or abnormal indoor temperature.
- E18: Malfunction of the communication module or power supply voltage abnormality.
- E19: Malfunction of the air filter.
- E20: Malfunction of the indoor ambient temperature sensor.
- E21: Malfunction of the communication board or abnormal communication data.
- E22: Malfunction of the indoor unit IPM module or compressor overcurrent.
- E23: Malfunction of the outdoor unit temperature sensor.
- E24: Malfunction of the outdoor unit DC voltage or abnormal compressor current.
- E25: Malfunction of the outdoor unit temperature protection or abnormal compressor temperature.
Indoor Carrier AC Error Codes List
- CODE: E0. – Indoor unit EEPROM parameter error
- CODE: E1. – Indoor / outdoor units communication error.
- CODE: E3. – Indoor fan speed has been out of control.
- CODE: E4. – Indoor room temperature sensor T1 open circuit or short circuit.
- CODE: E5. – Evaporator coil temperature sensor T2 open circuit or short circuit.
- CODE: EC. – Refrigerant Leakage Detection.
- CODE: F1. – Outdoor ambient temperature sensor T4 open circuit or short circuit.
- CODE: F2. – Condenser coil temperature sensor T3 open circuit or short circuit.
- CODE: F3. – Compressor discharge temperature sensor T5 open circuit or short circuit.
- CODE: F4. – Outdoor unit EEPROM parameter error.
- CODE: F5. – Outdoor fan speed has been out of control.
- CODE: P0. – IPM malfunction or IGBT over-strong current protection.
- CODE: P1. – Overvoltage or over low voltage protection.
- CODE: P2. – High-temperature protection of compressor top diagnosis and solution.
- CODE: P4. – Inverter compressor drive error.
- CODE: P5. – Mode conflict.
- CODE: P6. – Compressor voltage protection.
Outdoor Carrier AC Error Codes List
- CODE: E0. – Outdoor EEPROM malfunction.
- CODE: E2. – Indoor/outdoor units communication error.
- CODE: E3. – Communication malfunction between IPM board and outdoor mainboard.
- CODE: E4. – Open or short circuit of the outdoor unit temperature sensor.
- CODE: E5. – Voltage protection.
- CODE: E8. – Outdoor fan speed malfunction.
- CODE: F1. – No. A Indoor unit coil outlet temperature sensor or connector of sensor is defective.
- CODE: F2. – No. B Indoor unit coil outlet temperature sensor or connector of sensor is defective.
- CODE: F3. – No. C Indoor unit coil outlet temperature sensor or connector of sensor is defective.
- CODE: F4. – No. D Indoor unit coil outlet temperature sensor or connector of sensor is defective.
- CODE: F5. – No. E Indoor unit coil outlet temperature sensor or connector of sensor is defective.
- CODE: P1. – High-pressure protection.
- CODE: P2. – Low-pressure protection.
- CODE: P3. – Current protection of compressor.
- CODE: P4. – Temperature protection of compressor.
- CODE: P5. – High-temperature protection of condenser.
- CODE: P6. – IPM module protection.
These are just a few examples, and there may be additional error codes specific to certain models or series. It’s always recommended to consult the user manual or contact Carrier’s customer support for precise information about the error codes related to your specific air conditioning unit.