Midea · An established brand in the UK. 113 codes across 4 product families, each taken from the manufacturer’s manuals.
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Type the code on your display or a word from its meaning. Each code opens its own page with what it means, whether it is safe and what you can check.
113 codes
| Code | Meaning | Stops? | Homeowner check? |
|---|---|---|---|
| bA | T4 sensor out of operation range protection | Not stated | Yes |
| bH | PED board error | Yes | Yes |
| C2 | Relay adhesion on IBH PCB (units with internal backup heater) | Not stated | Yes |
| C3 | Current transformer failure or circuit failure of IBH PCB (units with IBH) | Not stated | Yes |
| C4 | C3 occurred 3 or more times (units with IBH) | Not stated | Yes |
| C7 | Over-high temperature protection for IPM module | Yes | Yes |
| C9 | Operate frequency unusual protect | Not stated | Yes |
| E0 | Water flow failure (10 times of E8) | Yes | Yes |
| E1 | Phase loss or phase reversal (3-phase units) | Yes | Yes |
| E2 | Communication fault between user interface and main control PCB | Yes | Yes |
| E3 | T1 electric heater/AHS water outlet temperature sensor error | Yes | Yes |
| E4 | T5 water tank temperature sensor error | Yes | Yes |
| E5 | T3 outdoor unit heat exchanger bottom temperature sensor error | Yes | Yes |
| E6 | T4 ambient temperature sensor error | Yes | Yes |
| E7 | Tbt balance tank temperature sensor / cascade final outlet water temperature sensor error | Yes | Yes |
| E8 | Water flow protection | Yes | Yes |
| E9 | Th return-air (suction) temperature sensor error | Yes | Yes |
| EA | Tp discharge temperature sensor error | Yes | Yes |
| Eb | Tsolar solar panel temperature sensor error | Yes | Yes |
| EC | T5_2 water tank temperature sensor error (reserved) | Yes | Yes |
| Ed | Tw_in plate heat exchanger inlet water temperature sensor error | Yes | Yes |
| EE | Hydronic system EEPROM error | Yes | Yes |
| F1 | Protection for DC bus undervoltage (1-phase units) | Yes | Yes |
| F75 | Protection for insufficient discharge overheating (superheat) degree | Not stated | Yes |
| FC1 | TL outdoor unit heat exchanger outlet temperature sensor error | Not stated | Yes |
| H0 | Communication error of main control PCB | Yes | Yes |
| H1 | Communication error between main control PCB and inverter PCB | Yes | Yes |
| H2 | T2 plate heat exchanger outlet refrigerant temperature sensor error | Yes | Yes |
| H3 | T2B plate heat exchanger inlet refrigerant temperature sensor error | Yes | Yes |
| H4 | 3 times of L1* in 60 mins | Not stated | Yes |
| H5 | Ta room temperature sensor error | Yes | Yes |
| H6 | Fan failure | Yes | Yes |
| H7 | Power overvoltage and under-voltage protection | Yes | Yes |
| H8 | H-SEN high pressure sensor error | Yes | Yes |
| H9 | Tw2 zone 2 water flow temperature sensor error | Yes | Yes |
| HA | Tw_out plate heat exchanger outlet water temperature sensor error | Yes | Yes |
| Hb | PP occurs 3 times in heating/DHW mode | Not stated | Yes |
| Hd | Communication fault between master unit and slave unit | Yes | Yes |
| HE | Communication error between main control board of hydronic module and Ta/room thermostat transfer PCB | Yes | Yes |
| HF | Outdoor unit EEPROM error | Yes | Yes |
| HH | 10 times of H6 in 120 mins | Yes | Yes |
| HL | PFC module fault | Not stated | Yes |
| HP | Low pressure protection in cooling mode | Yes | Yes |
| J1E | Fan drive hardware overcurrent protection | Not stated | Yes |
| J2E | Fan drive over-temperature protection | Not stated | Yes |
| J3E | Fan drive bus voltage too low error | Not stated | Yes |
| J5E | Fan motor failed to start | Not stated | Yes |
| J6E | Fan phase loss protection | Not stated | Yes |
| J11 | Fan phase current instantaneous overcurrent protection | Not stated | Yes |
| J12 | Fan phase current continuous 30 s overcurrent protection | Not stated | Yes |
| J31 | Fan drive bus voltage too high error | Not stated | Yes |
| J32 | Fan drive bus voltage excessively high error | Not stated | Yes |
| J43 | Fan drive abnormal phase current sampling bias | Not stated | Yes |
| J45 | Fan motor code mismatch error | Not stated | Yes |
| J46 | Fan drive IPM protection (FO) | Not stated | Yes |
| J47 | Fan drive module type mismatch (after module resistance tested) | Not stated | Yes |
| J52 | Fan motor stalling protection | Not stated | Yes |
| J61 | Fan terminals short circuit protection | Not stated | Yes |
| J65 | Fan drive IPM short circuit protection | Not stated | Yes |
| L0 | Inverter module protection | Not stated | Yes |
| L1 | DC bus low voltage protection | Not stated | Yes |
| L1E | Hardware overcurrent protection (compressor drive) | Not stated | Yes |
| L2 | DC bus high voltage protection | Not stated | Yes |
| L2E | Over-temperature protection (compressor drive) | Not stated | Yes |
| L3E | Bus voltage too low error | Not stated | Yes |
| L4 | MCE error | Not stated | Yes |
| L5 | Zero speed protection | Not stated | Yes |
| L5E | Motor failed to start | Not stated | Yes |
| L6E | Phase loss protection | Not stated | Yes |
| L7 | Phase sequence error | Not stated | Yes |
| L8 | Compressor frequency variation greater than 15 Hz within one second protection | Not stated | Yes |
| L9 | Actual compressor frequency differs from target frequency by more than 15 Hz protection | Not stated | Yes |
| L11 | Phase current instantaneous overcurrent protection | Not stated | Yes |
| L12 | Phase current continuous 30 s overcurrent protection | Not stated | Yes |
| L31 | Bus voltage too high error | Not stated | Yes |
| L32 | Bus voltage excessively high error | Not stated | Yes |
| L34 | Phase loss error of three-phase power supply | Not stated | Yes |
| L43 | Abnormal phase current sampling bias | Not stated | Yes |
| L45 | Fan motor code mismatch error (as printed in compressor-drive list) | Not stated | Yes |
| L46 | IPM protection (FO) | Not stated | Yes |
| L47 | Module type mismatch | Not stated | Yes |
| L52 | Motor stalling protection | Not stated | Yes |
| L61 | Compressor terminals short circuit protection | Not stated | Yes |
| L65 | IPM short circuit protection | Not stated | Yes |
| LB7 | PED bH error | Not stated | Yes |
| LBE | Action of high pressure switch | Not stated | Yes |
| LC1 | Instantaneous overcurrent of PFC software protection (3-phase units) | Not stated | Yes |
| LC2 | PFC software continuous 30 s overcurrent protection (3-phase units) | Not stated | Yes |
| LC3 | PFC low voltage protection (3-phase units) | Not stated | Yes |
| LC4 | PFC power factor less than 0.8 (3-phase units) | Not stated | Yes |
| LC5 | PFC valid value overcurrent protection (3-phase units) | Not stated | Yes |
| LC6 | PFC1 channel hardware overcurrent protection (3-phase units) | Not stated | Yes |
| LC7 | PFC2 channel hardware overcurrent protection (3-phase units) | Not stated | Yes |
| LC8 | PFC3 channel hardware overcurrent protection (3-phase units) | Not stated | Yes |
| LC9 | Over-temperature protection of PFC module (3-phase units) | Not stated | Yes |
| LCA | PFC module CBC overcurrent error protection (3-phase units) | Not stated | Yes |
| LCB | Overvoltage of PFC bus or PFC half bus (3-phase units) | Not stated | Yes |
| LCC | Short circuit of PFC IGBT (3-phase units) | Not stated | Yes |
| LCD | Abnormal PFC AD sampling bias (3-phase units) | Not stated | Yes |
| LCE | PFC hardware overcurrent protection (3-phase units) | Not stated | Yes |
| P0 | Low pressure protection | Yes | Yes |
| P1 | High pressure switch protection | Yes | Yes |
| P3 | Overcurrent protection | Yes | Yes |
| P4 | Compressor protection against excessively high discharge temperature | Yes | Yes |
| P5 | Big temperature difference between outlet water temperature and inlet water temperature | Yes | Yes |
| P6 | Inverter module protection (shown on user interface when any of L0, L1, L2, L4, L5, L7, L8 or L9 occur) | Not stated | Yes |
| P9 | DC fan motor protect | Not stated | Yes |
| P21 | L-SEN low pressure sensor error | Not stated | Yes |
| P27 | H-SEN and L-SEN connected reversely (detected when compressor is off) | Not stated | Yes |
| Pb | Anti-freezing control running (indicator) | Varies by model | Yes |
| Pd | Protection for over-high condensing temperature in cooling mode | Yes | Yes |
| PL | Transducer module radiator temperature too high protect | Not stated | Yes |
| PP | Protection for abnormal temperature difference between outlet water and inlet water | Yes | Yes |