Lennox 507550-06 indoor displays Error Codes
Mini-split unit · Split & Multi-Split
Model numbers in this family: 3WMC, M22A, M33C, MCFA, MCFB, MFMA, MMDB, MWMC, Programmable Wired Controller
- -- Mode conflict for multi-zone systems
- CL Active clean
- CP Remote switched off.
- E0 Indoor unit EEPROM error
- E1 Communication error between indoor unit and outdoor units
- E2 Indoor room temperature sensor error (T1)
- E3 Indoor coil temperature sensor error (T2)
- E4 Indoor coil outlet temperature sensor error (T2B)
- E5 Compressor discharge temperature sensor error (T5)
- E7 Indoor unit EEPROM error
- E8 Indoor fan motor zero-crossing signal detection error (AC motor)
- EA Outdoor current overload protection
- EC Refrigerant leakage detection (Cooling mode only)
- EC 07 Outdoor unit fan speed error (DC fan motor)
- EC 51 Outdoor unit EEPROM error
- EC 52 Outdoor coil temperature sensor error (T3)
- EC 53 Outdoor ambient temperature sensor error (T4)
- EC 54 Compressor discharge temperature sensor error (T5)
- EC 56 Indoor unit #1 coil outlet temperature sensor error (T2B for multi-zone) Indoor unit #2…
- EE High water level alarm
- EF Outdoor IGBT temperature sensor error
- EH 00 Indoor unit EEPROM error
- EH 03 Indoor fan speed error (DC motor)
- EH 0A Indoor unit EEPROM parameter error
- EH 0b Communication error between main control board and display board
- EH 60 Indoor room temperature sensor error (T1)
- EH 61 Indoor coil temperature sensor error (T2)
- EL 01 Communication error between indoor unit and outdoor units
- EL 0C Refrigerant leakage detection (Cooling mode only)
- Ed Outdoor unit EEPROM error
- F0 Communication error between wired controller and indoor unit
- F1 Outdoor ambient temperature sensor error (T4)
- F2 Outdoor coil temperature sensor error (T3)
- F3 Compressor discharge temperature sensor error (T5)
- F4 Outdoor unit EEPROM error
- F5 Outdoor unit fan speed error (DC fan motor)
- F6 Indoor coil outlet temperature sensor error (T2B)
- FC Forced cooling.
- FP Heating in room temperature under 8°C.
- P0 Inverter module IPM error
- P1 High or Low voltage protection
- P2 High temperature sensed at compressor top
- P3 Outdoor low ambient temperature protection
- P4 Compressor drive error
- P6 High pressure switch open
- P7 Outdoor IGBT temperature sensor error
- PC 00 Inverter module IPM error
- PC 01 High or Low voltage protection
- PC 02 High temperature sensed at compressor top
- PC 03 High pressure switch open
- PC 04 Compressor drive error
- PC 08 Outdoor current overload protection
- PC 0L Outdoor low ambient temperature protection
- SC Self Clean feature active. In cooling or dry mode, the indoor coil dries and then the…
- dF Defrost
- nF Filter replacement reminder (power on display for 15 seconds).
Reference only. Confirm against the manual for your exact model. Data release 105f66ecb9e96e5dc473025d.