Lennox MPA Error Codes

Mini-split unit · Split & Multi-Split

Model numbers in this family: MLA, MPA, MPB

• -- Multi zone mode conflict - - (dash dash) indoor display or operation lamp Flashes 6…
• CF CF anti-cold blow. Fan will stay Off on call for heat unit indoor coil warms up to 90°F…
• CL When the LED displays CL, this is a reminder to check and clean the air filter.
• CP When the LED displays CP, this indicates the J1 jumper removed or loose or the remote on…
• E0 Outdoor unit EEPROM parameter error
• E2 Communication malfunction between indoor and outdoor units
• E3 Communication malfunction between IPM board and outdoor main control board
• E4 Outdoor temperature sensor (coil sensor T3,ambient sensor T4, Compressor discharge sensor…
• E5 Over-voltage or under-voltage protection
• E6 PFC module protection
• E8 Outdoor fan speed malfunction
• F1 No. A Indoor unit coil outlet temperature sensor malfunction
• F2 No. B Indoor unit coil outlet temperature sensor malfunction
• F3 No. C Indoor unit coil outlet temperature sensor malfunction
• F4 No. D Indoor unit coil outlet temperature sensor malfunction
• F5 No. E Indoor unit coil outlet temperature sensor malfunction
• F6 No. F Indoor unit coil outlet temperature sensor malfunction
• FC In forced cooling mode, the LED displays “FC” or alternative displays between running…
• FP Freeze protection. The silence (FP) button was pushed and held for more than three…
• Flash Flash Outdoor unit error.
• Flash Flash / Flash Flash / Flash Flash Control chip communication error.
• Flash Flash / Flash Flash / ON Driver EEPROM error.
• Flash Flash / Flash Flash / Off Driver chip start-up failure.
• Flash Flash / ON / Flash Flash Could be one of the following: • Driver phase loss protection • Driver zero speed…
• Flash Flash / ON / ON DC bus voltage is too high or to low protection.
• Flash Flash / Off / Flash Flash IGBT over-current or IPM over-current
• Flash Flash / Off / ON Could be one of the following: • Indoor and outdoor unit communication error. • Outdoor…
• LC In low ambient cooling mode, the LED displays “LC” or alternative displays between…
• LP Low ambient temperature protection
• NF When the LED displays NF, this indicates 2880 hour filter replacement reminder. To clear…
• ON / ON / Off Normal operation
• On Normal operation
• P1 High pressure protection
• P2 Low pressure protection
• P3 Current overload protection
• P4 Temperature protection of compressor discharge
• P5 Condenser high temperature protection
• P6 Inverter module (IPM) malfunction
• PH In compressor pre-heating, The LED displays “PH” or alternative displays between running…
• RO During the oil return process, The LED displays “RO” or alternative displays between…
• Slow Flash Standby
• Slow Flash / Off / ON Stand-by
• dF In defrosting mode, the LED displays “dF” or alternative displays between running…

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