Haier · A niche brand in the UK. 191 codes across 4 product families, each taken from the manufacturer’s manuals. Haier technical support ↗
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191 codes
| Code | Meaning | Stops? | Homeowner check? |
|---|---|---|---|
| 1 | In water temp.sensor (Twi) failure | Partly | Yes |
| 2 | Out water temp.sensor (Two) failure | Partly | Yes |
| 3 | In refrigerant temp.sensor (Thi) failure | Partly | Yes |
| 4 | Out refrigerant temp.sensor (Tho) failure | Partly | Yes |
| 5 | EEPROM failure | Not stated | Yes |
| 6 | Communication failure with outdoor unit | Not stated | Yes |
| 7 | Communication fault with wired controller | Not stated | Yes |
| 8 | WS abnormal (water flow switch) | Not stated | Yes |
| 10 | Flow rate too low failure | Partly | Yes |
| 11 | IO PCB communication failure | Not stated | Yes |
| 12 | HU zone2 behind water mixing valve temp.sensor failure | Partly | Yes |
| 14 | low pressure abnormal | Yes | Yes |
| 15 | Antifreeze fault | Not stated | Yes |
| 16 | Heat exchange unit HU in/out water temp. too high | Not stated | Yes |
| 17 | HU zone1 room temp.sensor failure | Partly | Yes |
| 18 | HU zone2 room temp.sensor failure | Partly | Yes |
| 20 | Defrosting temp.sensor (Te) failure | Partly | Yes |
| 21 | Ambient temp.sensor (Ta) failure | Partly | Yes |
| 22 | Suction temp.sensor (Ts) failure | Partly | Yes |
| 23 | Discharging temp.sensor (Td) failure | Partly | Yes |
| 26 | Communication failure with indoor | Not stated | Yes |
| 28 | High pressure sensor failure | Partly | Yes |
| 29 | Low pressure sensor failure | Partly | Yes |
| 30 | High pressure switch HPS failure | Yes | Yes |
| 33 | Outdoor EEPROM failure | Not stated | Yes |
| 34 | Discharging temp. too high protection (Td) | Not stated | Yes |
| 35 | 4-way valve reversing failure | Yes | Yes |
| 38 | High pressure too low protection (Pd) | Yes | Yes |
| 39 | Low pressure too low (Ps) / compression ratio too high protection | Yes | Yes |
| 40 | High pressure too high protection (Pd) | Yes | Yes |
| 43 | Discharging temp. too high protection (Td) | Not stated | Yes |
| 46 | Discharging communication fault with IGBT Power Module | Not stated | Yes |
| 71 | DC FAN failure | Yes | Yes |
| 75 | High-low differential pressure too small / no differential pressure | Yes | Yes |
| 78 | Too little refrigerant | Yes | Yes |
| 81 | Radiator of transducer temp too high | Yes | Yes |
| 82 | Compressor current protection | Yes | Yes |
| 83 | Outdoor unit model BM setting error | Not stated | Yes |
| 87 | Defrosting with too low water temperature | Not stated | Yes |
| 110 | Module hardware excess current | Yes | Yes |
| 111 | Compressor out of step | Yes | Yes |
| 112 | Radiator of transducer temp too high | Yes | Yes |
| 113 | Transducer overload | Yes | Yes |
| 114 | Voltage too low of DC bus line | Yes | Yes |
| 115 | Voltage too high of DC bus line | Yes | Yes |
| 116 | Communication abnormal between transducer and control PCB | Not stated | Yes |
| 117 | Software excess current | Yes | Yes |
| 118 | Compressor startup failure | Yes | Yes |
| 119 | Current detecting circuit abnormal of transducer | Yes | Yes |
| 120 | Module power supply abnormal | Yes | Yes |
| 121 | Power supply of inverter board is abnormal | Yes | Yes |
| 122 | Radiator temp. sensor abnormal | Partly | Yes |
| 555.1 | Outer circumstance temp. Ta>27°C heating standby | Partly | Yes |
| 555.3 | Outer circumstance temp. Ta>54°C or Ta<-10°C, refrigeration (cooling) standby | Partly | Yes |
| 555.4 | Oil temp. fails to meet the condition of system start | Partly | Yes |
| 555.5 | Outdoor unit mode does not match indoor unit mode (outdoor unit set to cooling-only or heating-only, conflicting with indoor unit mode) - standby | Partly | Yes |
| E01 | HU Water Inlet Temperature Sensor Abnormality | Partly | Yes |
| E2 | Over-temperature protection of heating outlet / Low temperature protection of cooling outlet | Not stated | Yes |
| E02 | HU Water Outlet Temperature Sensor Two / Tout2 Abnormality | Partly | Yes |
| E3 | Water tank temperature sensor failure | Partly | Yes |
| E03 | HU Liquid Pipe Temperature Sensor Abnormality | Partly | Yes |
| E4 | Ambient temperature sensor failure | Partly | Yes |
| E04 | HU Gas Pipe Temperature Sensor Abnormality | Partly | Yes |
| E5 | Defrosting temperature sensor failure | Partly | Yes |
| E05 | EEPROM Abnormality | Not stated | Yes |
| E6 | Exhaust temperature sensor failure | Partly | Yes |
| E06 | Communication Error between Outdoor Unit and Indoor Unit | Not stated | Yes |
| E7 | Wire controller communication failure | Not stated | Yes |
| E07 | Communication Error between Remote Wired Controller and Indoor Unit | Not stated | Yes |
| E8 | High pressure switch protection, high pressure protection | Yes | Yes |
| E08 | Flow Switch Abnormality / Low Water Flow | Not stated | Yes |
| E9 | Protection over ambient temperature range | Not stated | Yes |
| E09 | Indoor Unit Address Duplication Abnormality | Not stated | Yes |
| E10 | DHW Tank Temperature Sensor Abnormality | Partly | Yes |
| E11 | I/O PCB Communication Abnormality | Not stated | Yes |
| E12 | HU ZONE2 Water Mixing Valve Temperature Sensor Abnormality | Partly | Yes |
| E13 | Water Leakage (reserved) | Not stated | Yes |
| E14 | Low Pressure Switch Abnormality (reserved) | Yes | Yes |
| E15 | Anti-freeze Abnormality | Not stated | Yes |
| E16 | HU Water Inlet/Outlet Temperature Over High | Not stated | Yes |
| E17 | HU ZONE1 Ambient Temperature Sensor Abnormality | Partly | Yes |
| E18 | HU ZONE2 Ambient Temperature Sensor Abnormality | Partly | Yes |
| E19 | Pool Mixing Valve Water Outlet/Pool Water Temperature Sensor | Partly | Yes |
| E20 | Outdoor Unit Abnormality | Not stated | Yes |
| E20-0 | Outdoor Condenser Defrosting Coil Temperature Sensor Te1 Abnormality | Partly | Yes |
| E20-1 | Outdoor Condenser Defrosting Coil Temperature Sensor Te2 Abnormality | Partly | Yes |
| E21 | Outdoor Ambient Temperature Sensor Abnormality | Partly | Yes |
| E22 | Outdoor Compressor Suction Temperature Sensor Abnormality | Partly | Yes |
| E23 | Compressor Discharge Temperature Sensor Abnormality | Partly | Yes |
| E24 | Compressor Oil Temperature Sensor Toil Abnormality | Partly | Yes |
| E27 | Oil Temperature Over High Protection (Toil) | Yes | Yes |
| E28 | Compressor Discharge Pressure Sensor Abnormality | Partly | Yes |
| E29 | Compressor Suction Pressure Sensor Abnormality | Partly | Yes |
| E30 | High Pressure Switch HPS Abnormality | Yes | Yes |
| E32-0 | Outdoor Subcooling Coil Outlet Temperature Sensor Abnormality | Partly | Yes |
| E32-1 | Outdoor Liquid Pipe Subcooling Temperature Sensor Abnormality | Partly | Yes |
| E33 | Outdoor Unit PCB EEPROM Abnormality | Not stated | Yes |
| E34 | Compressor Discharge Temperature Over High Protection (Td) | Yes | Yes |
| E35 | Four Way Valve Reversing Abnormality | Yes | Yes |
| E36 | Oil Temperature Over Low Protection (Toil) | Yes | Yes |
| E38 | High Pressure Over Low Protection | Yes | Yes |
| E39-0 | Low Pressure Over Low Protection | Yes | Yes |
| E39-1 | Compression Ratio Over High Protection | Yes | Yes |
| E40 | High Pressure Over High Protection | Yes | Yes |
| E43 | Compressor Discharge Temperature Sensor Over Low Protection | Yes | Yes |
| E46 | Communication Error with Driver PCB | Not stated | Yes |
| E49 | Low Pressure Switch Abnormality | Yes | Yes |
| E51-0 | LEVa Overcurrent Protection | Yes | Yes |
| E51-2 | LEVb Overcurrent Protection | Yes | Yes |
| E52-0 | LEVa Disconnection Abnormality | Yes | Yes |
| E52-2 | LEVb Disconnection Abnormality | Yes | Yes |
| E53 | CT Current Over Low or Current Sensor Abnormality | Partly | Yes |
| E54 | Communication Error with Subcooling Module | Not stated | Yes |
| E57 | Communication Error between Subcooling Module and Main PCB (sent by Subcooling Module) | Not stated | Yes |
| E58 | Subcooling Module Tc1 Temperature Sensor Error (sent by Subcooling Module) | Partly | Yes |
| E59 | Subcooling Module Tc2 Temperature Sensor Error (sent by Subcooling Module) | Partly | Yes |
| E60 | Subcooling Module(sent by Subcooling Module) | Yes | Yes |
| E61 | Subcooling Module(sent by Subcooling Module) | Yes | Yes |
| E62 | Subcooling Module(sent by Subcooling Module) | Yes | Yes |
| E63 | Subcooling Module Dip Switch Error | Not stated | Yes |
| E64 | CT Current Over High | Yes | Yes |
| E65 | Electrical Control Box Temperature Sensor(Tb) Abnormality | Partly | Yes |
| E68 | Communication Error with DHW I/O PCB | Not stated | Yes |
| E69 | DHW I/O PCB Tank Temperature Abnormality | Not stated | Yes |
| E70 | DHW I/O PCB Other Abnormalities | Not stated | Yes |
| E71-0 | Upper DC Fan Motor Abnormality | Yes | Yes |
| E71-1 | Lower DC Fan Motor Abnormality | Yes | Yes |
| E74 | System Emergency Stop Abnormality | Not stated | Yes |
| E81 | Compressor Driver PCB Temperature Over High Protection | Yes | Yes |
| E82 | Compressor Current Protection | Yes | Yes |
| E83 | Incorrect Outdoor Unit Dip Switch Setting | Not stated | Yes |
| E87 | Defrosting with Over Low Water Temperature | Not stated | Yes |
| E110 | Compressor Hardware Overcurrent | Yes | Yes |
| E111 | Compressor Loss of Synchronism | Yes | Yes |
| E111-4 | Fan Motor Loss of Synchronism | Yes | Yes |
| E112 | Compressor Driver PCB Heat Sink Temperature Over High | Yes | Yes |
| E112-4 | Fan Motor Driver PCB Heat Sink Temperature Over High | Yes | Yes |
| E114 | The input power supply voltage of the inverter is abnormal | Yes | Yes |
| E116 | Communication Error between Compressor Driver PCB and Main PCB | Not stated | Yes |
| E117 | Compressor Software Overcurrent | Yes | Yes |
| E117-4 | Fan Motor Software Overcurrent | Yes | Yes |
| E118 | Compressor Start-up Abnormality | Yes | Yes |
| E119 | Compressor Driver PCB Current Detect Circuit Abnormality | Yes | Yes |
| E121 | Compressor Control Board Power Supply Abnormality | Yes | Yes |
| E122 | Compressor Driver PCB Heat Sink Temperature Sensor Abnormality | Partly | Yes |
| E124 | Compressor Driver PCB Three-Phase Power Supply Abnormality | Yes | Yes |
| EA | Control board memory chip failure | Not stated | Yes |
| Eb | Inlet temperature sensor failure | Partly | Yes |
| EC | Module communication failure (no communication between the main board in case of multi-connection) | Not stated | Yes |
| Ed | Suction temperature sensor failure | Partly | Yes |
| EF | Condenser (coil) temperature sensor failure | Partly | Yes |
| F0 | WiFi module configuration failure | Yes | Yes |
| F1 | 4-way valve reversal failure | Yes | Yes |
| F3 | Over-temperature protection of compressor exhaust | Yes | Yes |
| F5 | High temperature of outdoor coil outlet (defrosting) temperature sensor | Partly | Yes |
| F6 | Compressor overcurrent protection | Yes | Yes |
| F7 | System fluoride deficiency protection (refrigerant shortage) | Yes | Yes |
| F9 | Low pressure switch protection / low pressure protection | Yes | Yes |
| H1 | Refrigerant gas pipe temperature sensor failure | Partly | Yes |
| H2 | Liquid pipe temperature sensor failure | Partly | Yes |
| H4 | Start-up failure and loss of synchronism | Yes | Yes |
| H5 | Total backwater (return water) failure | Not stated | Yes |
| H6 | Total outlet water failure | Not stated | Yes |
| L0 | Antifreeze protection | Not stated | Yes |
| L3 | Outlet temperature sensor failure | Partly | Yes |
| L4 | Economizer inlet temperature sensor failure | Partly | Yes |
| L5 | Economizer outlet temperature sensor failure | Partly | Yes |
| L6 | Fan 2 feedback failure | Yes | Yes |
| L7 | Fan 1 feedback failure | Yes | Yes |
| L8 | Inverter circulating water pump failure | Not stated | Yes |
| LA | Flow switch failure | Not stated | Yes |
| LC | Antifreeze protection abnormal | Not stated | Yes |
| LE | Over-temperature difference protection of inlet and outlet | Not stated | Yes |
| LF | Three-phase electric abnormal protection | Yes | Yes |
| P1 | Output short-circuit protection or output instantaneous overcurrent | Yes | Yes |
| P3 | Over-temperature protection of IPM module radiator | Yes | Yes |
| P4 | Output overload, overcurrent, or three-phase imbalance | Yes | Yes |
| P5 | DC bus under-voltage protection | Yes | Yes |
| P6 | DC bus over-voltage protection | Yes | Yes |
| P7 | No communication of driver | Not stated | Yes |
| P8 | Driver current and voltage sampling circuit failure | Yes | Yes |
| PA | AC input undervoltage, open phase protection, input power abnormal or compressor reversal | Yes | Yes |
| PB | Loss of synchronism detection (ID number mismatch) | Yes | Yes |
| PC | Radiator sensor failure | Partly | Yes |
| PD | Driver input overcurrent | Yes | Yes |
| PF | Input instantaneous overcurrent or short circuit protection | Yes | Yes |
| U2 | Low pressure sensor failure | Partly | Yes |
| U5 | High pressure sensor failure | Partly | Yes |
| UA | Discharge superheat protection | Yes | Yes |
| UE | Outlet 2 temperature sensor failure | Partly | Yes |
| UF | Mixed water temperature sensor fault | Partly | Yes |