Lennox MWCB Error Codes

Mini-split unit · Split & Multi-Split

Model numbers in this family: MWCB, MWHB

• CL Active clean
• CP Remote On/Off
• 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)
• 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)
• FC Force Cooling
• FP 46F heat mode (available on heat pump systems only)
• LL Remote or Wired controller Lock
• OF Time Off
• On ECO mode
• PC 00 Inverter module IPM error
• PC 01 High or Low voltage protection
• PC 04 Compressor drive error
• PC 08 Outdoor current overload protection
• PC 0L Outdoor low ambient temperature protection
• cF Anti-cold Air Flow (available on heat pump systems only)
• dF Defrost (available on heat pump systems only)

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