DIY HVAC Tools

Arctic King mini split error codes

Arctic King is a Midea brand, so its mini splits use the Midea code set.

Covers: Arctic King single-zone, Arctic King multi-zone.

Type it exactly as the unit shows it. Not sure which brand? It is printed on the front of the indoor unit.

Most looked-up Arctic King codes

E1Communication error between indoor and outdoor unitsE5Evaporator coil temperature sensor (T2) open or short circuitECRefrigerant leak detected (low refrigerant charge)P4Inverter compressor drive errorEL 01Communication error between indoor and outdoor units

All Arctic King codes

58 codes. Type to filter the list.

CodeMeaningTypeFix
E0Indoor unit EEPROM parameter errorFaultDIY checks
E1Communication error between indoor and outdoor unitsFaultDIY checks
E2Zero-crossing signal detection errorFaultDIY checks
E3Indoor fan speed out of control (indoor fan motor fault)FaultDIY checks
E4Indoor room temperature sensor (T1) open or short circuitFaultDIY checks
E5Evaporator coil temperature sensor (T2) open or short circuitFaultDIY checks
ECRefrigerant leak detected (low refrigerant charge)FaultDIY checks
F0Overload current protection (compressor over-current)ProtectionDIY checks
EBCommunication error between indoor main board and display boardFaultDIY checks
EFIntelligent eye (occupancy sensor) module errorFaultDIY
F1Outdoor ambient temperature sensor (T4) open or short circuitFaultDIY checks
F2Condenser coil temperature sensor (T3) open or short circuitFaultDIY checks
F3Compressor discharge temperature sensor (TP) open or short circuitFaultDIY checks
F4Outdoor unit EEPROM parameter errorFaultTechnician
F5Outdoor fan speed out of control (outdoor fan motor fault)FaultDIY checks
P0Inverter module (IPM) malfunctionProtectionTechnician
P1Over-voltage or under-voltage protectionProtectionDIY checks
P2High temperature protection (compressor top or inverter module)ProtectionDIY checks
P3Outdoor temperature too low protection (heating lockout)ProtectionDIY
P4Inverter compressor drive errorProtectionTechnician
P5Mode conflict (multi-zone)ProtectionDIY
P6Outdoor low pressure protectionProtectionDIY checks
dFDefrost cycle runningStatusDIY
CLFilter cleaning reminderStatusDIY
APWi-Fi pairing (access point) modeStatusDIY
EH 00Indoor unit EEPROM parameter errorFaultDIY checks
EL 01Communication error between indoor and outdoor unitsFaultDIY checks
EH 02Zero-crossing signal detection errorFaultDIY checks
EH 03Indoor fan speed out of controlFaultDIY checks
EH 60Indoor room temperature sensor (T1) open or short circuitFaultDIY checks
EH 61Evaporator coil temperature sensor (T2) open or short circuitFaultDIY checks
EL 0CRefrigerant leak detected (low charge)FaultDIY checks
EH 0AIndoor unit EEPROM parameter errorFaultDIY checks
EH 0bCommunication error between indoor main board and display boardFaultDIY checks
EC 51Outdoor unit EEPROM parameter errorFaultTechnician
EC 52Condenser coil temperature sensor (T3) open or short circuitFaultDIY checks
EC 53Outdoor ambient temperature sensor (T4) open or short circuitFaultDIY checks
EC 54Compressor discharge temperature sensor (TP) open or short circuitFaultDIY checks
EC 56Coil outlet temperature sensor (T2B) open or short circuitFaultDIY checks
EC 07Outdoor fan speed out of controlFaultDIY checks
PC 00Inverter module (IPM) malfunctionProtectionTechnician
PC 01Over-voltage or under-voltage protectionProtectionDIY checks
PC 02Compressor top temperature (overload) protectionProtectionDIY checks
PC 03Pressure protection (high or low pressure switch)ProtectionDIY checks
PC 04Inverter compressor drive errorProtectionTechnician
PC 08Outdoor over-current protectionProtectionDIY checks
PC 0ACondenser high temperature protectionProtectionDIY checks
PC 0FPFC module malfunctionProtectionTechnician
PC 40Communication error between outdoor main board and inverter boardFaultTechnician
PC 43Compressor missing phase (lack of phase) protectionProtectionTechnician
PC 44Compressor zero-speed protectionProtectionTechnician
PC 46Compressor speed out of controlProtectionTechnician
PC 49Compressor over-current (phase current) protectionProtectionTechnician
FPLow-temperature heating hold (46°F freeze-protection mode)StatusDIY
FCForced cooling test modeStatusDIY
LLRemote or wired controller lockedStatusDIY
cFAnti-cold-air (heating warm-up)StatusDIY
CPRemote on/off contact openStatusDIY

How Arctic King shows error codes

indoor unit display (classic two-character codes): The code appears on the indoor unit's LED display in place of the set temperature. Some models also blink the indicator lamps in a pattern that matches the code. E codes are faults in the indoor unit or its communication link, F codes are faults on the outdoor side, and P codes are protections: the outdoor unit has stopped itself to prevent damage. EC is the refrigerant leak check.

indoor unit display (four-character codes): The display shows a two-letter prefix and a two-character suffix, either together (EH60) or alternating (EH, then 60). Write both parts down; the suffix is what identifies the fault. EH and EL are indoor-side faults, EC is an outdoor-side fault, and PC is an outdoor protection: the unit stopped itself to prevent damage.

Brands built on the same platform

These brands share a code table with Arctic King because the same factory builds them, so their pages describe the same faults: ACiQ, AirEase, Arcoaire, Armstrong Air, Blueridge, Bosch, Bryant, Carrier, Comfortmaker, Concord, Day & Night, Della, Ducane, Heil.

Sources

  • Arctic King mini split owner's manual (error code table)
  • Midea residential split service manuals

Updated September 2026. Manufacturer site: www.arctic-king.com