Error Codes and What They Mean
List of possible MRCOOL Error Codes:
The most common error codes below have a link. Contact MrCool for any Error Codes without a link.
- E0 - Indoor unit EEPROM parameter error
- E1 - Indoor / outdoor units communication error
- E2 - Zero-crossing signal detection error
- E3 - Indoor fan speed has been out of control
- E4 - Indoor room temperature sensor T1 open circuit or short circuit
- E5 - Evaporator coil temperature sensor T2 open circuit or short circuit
- EC - Refrigerant leakage detection
- F0 - Overload current protection
- F1 - Outdoor ambient temperature sensor T4 open circuit or short circuit
- F2 - Condenser coil temperature sensor T3 open circuit or short circuit
- F3 - Compressor discharge temperature sensor TP open circuit or short circuit
- F4 - Outdoor unit EEPROM parameter error
- F5 - Outdoor fan speed has been out of control
- P0 - IPM malfunction or IGBT over-strong current protection
- P1 (PC 01) - Over voltage or over low voltage protection
- P2 - High temperature protection of IPM module or compressor top
- P3 - Outdoor ambient temperature too low
- P4 (PC 04) - Inverter compressor drive error
- P5 - Indoor units mode conflict (multi-zone ONLY)
- P6 - Low pressure protection(Only for 36K)
- How to Change a MrCool Condenser Control Board
- How to Change a MrCool Air Handler Control Board
