Lennox MWMA Error Codes

Mini-split unit · Split & Multi-Split

Model numbers in this family: 3WMB036, M22A, M33A, M33B, MCFA, MCFB, MMDA, MMDB, MWMA, MWMB

• -- Mode conflict
• E0 Indoor unit EEPROM error
• E1 Communication error between indoor and outdoor units (E2 for outdoor code)
• E2 Communication error between outdoor unit and all indoor units.
• E3 Communication error between outdoor unit main control and IPM control.
• E4 Indoor return air temperature sensor error
• E5 High and low voltage protection.
• E8 Outdoor DC fan speed error.
• EC Low refrigerant
• EE High water level alarm
• F0 Outdoor current overload sensed Note: (outdoor unit display --) two dashes
• F1 Indoor unit #1 coil outlet temperature sensor error.
• F2 Indoor unit #2 coil outlet temperature sensor error.
• F3 Compressor discharge temperature sensor error (T5) Malfunction outdoor unit display E4
• F4 Indoor unit #4 coil outlet temperature sensor error.
• F5 Indoor unit #5 coil outlet temperature sensor error.
• F6 Indoor unit #6 coil outlet temperature sensor error.
• P0 Inverter module IPM error - outdoor display P6
• P1 High or low voltage protection - outdoor display E5
• P2 Low pressure switch open
• P3 Outdoor compressor current overload sensed.
• P4 Compressor drive error
• P5 High temperature sensed at outdoor coil.
• P6 Inverter module (IPM) error.

Reference only. Confirm against the manual for your exact model. Data release 105f66ecb9e96e5dc473025d.