HAIER air conditioner error codes help technicians or users identify potential issues with the air conditioning system. Below is a detailed guide to these error codes for various HAIER air conditioner units.
Error Codes for HAIER Wall-Mounted Indoor Units:
| Error Code | Description |
|---|---|
| E0 | Drainage system issue. |
| E1 | Indoor ambient temperature sensor failure. The sensor may be short-circuited or have an open circuit; the signal may resume operation. |
| E2 | Indoor coil temperature sensor failure. The sensor may be short-circuited or have an open circuit; the signal may resume operation. |
| E3 | Outdoor temperature sensor malfunction. |
| E4 | Incorrect EEPROM. Electrified to test the E2 checksum or E2 failure. |
| E5 | Overcurrent protection limit exceeded. |
| E6 | Pressure protection activated. |
| E7 | Communication failure between indoor and outdoor units. Continuous communication failure for 4 minutes; signal may resume operation. |
| E8 | Communication issue between indoor and outdoor units. |
| E9 | Communication issue between indoor and outdoor units. |
| E14 | Indoor fan motor failure. Incorrect fan motor wiring or abnormal operation. |
| E18 | Temperature cut-off protection. Abnormal response from the external 4-way valve. |
| F1 | Module malfunction. Outdoor module is abnormal. |
| F2 | Outdoor DC motor failure. Motor is abnormal. |
| F3 | Communication failure between the IPM and outdoor PCB. |
| F4 | Compressor overheating/discharge temperature protection. Compressor discharge temperature exceeds the safety threshold. |
| F5 | Module overcurrent or current transducer failure. |
| F6 | Outdoor ambient temperature sensor failure. Short-circuited or open-circuited sensor. |
| F7 | Outdoor suction/defrost temperature sensor failure. Sensor may be short-circuited or open. |
| F8 | High-pressure abnormality. Excessively high system pressure. |
| F9 | Low-pressure abnormality. Abnormal low pressure. |
| F10 | No AC power supply. |
| F11 | Abnormal EEPROM in outdoor PCB. Electrified to test E2 checksum; faulty if incorrect. |
| F12 | Outdoor EEPROM failure. |
| F13 | Communication failure between the outdoor PCB and module. |
| F14 | Compressor discharge temperature sensor failure. Sensor may be short-circuited or open. |
| F15 | Compressor operating abnormally. Can resume operation. |
| F16 | Operating status detection circuit failure. Detection circuit or compressor malfunction; operation may resume. |
| F19 | Power supply voltage too high or too low. |
| F21 | Defrost temperature sensor failure. |
| F22 | AC overcurrent protection for the outdoor model. |
| F23 | Single-phase compressor overcurrent protection. |
| F25 | Compressor discharge temperature sensor failure. |
| F28 | Station loop detection error. |
| F66 | Ambient temperature sensor failure. |
| EC | Refrigerant leak. |
Error Codes for HAIER Portable Air Conditioners:
| Error Code | Description |
|---|---|
| E0 | Indicates incoming power issues, such as low voltage or excessive power consumption. Disconnect the unit for 10 minutes; technical service may be required. |
| E1 | Indicates a stuck button on the front panel. Disconnect the unit, press all buttons firmly to reset, and reconnect to power. Technical service may be needed. |
| E4 | Indicates the built-in tank needs emptying. The tank float may be stuck. Check for blockages in the float mechanism. |
| STOP | Indicates the tank needs emptying or the float is stuck. The unit will not operate until resolved. Empty the tank and check for obstructions. |
| High Temp | Appears when room temperature exceeds 99°F. If the temperature is below this threshold, technical service may be necessary. |
Commercial HAIER LED Error Code List:
| LED Blinks | Description | Analysis and Diagnosis |
|---|---|---|
| 1 | EEPROM failure. | EEPROM failure on the main outdoor PCB. |
| 2 | IPM failure. | Fault in the IPM module. |
| 4 | Communication error with SPDU module. | Communication failure lasting over 4 minutes. |
| 5 | High-pressure protection. | System pressure exceeds 4.15 MPa. |
| 6 | Module voltage issue. | Overvoltage/undervoltage protection from SPDU module. |
| 8 | Compressor discharge temperature issue. | Discharge temperature exceeds 110°C. |
| 9 | DC motor anomaly. | DC motor stuck or malfunctioning. |
| 10 | Piping sensor anomaly. | Sensor is short-circuited or open-circuited. |
| 12 | Outdoor ambient sensor anomaly. | Sensor is short-circuited or open-circuited. |
| 13 | Compressor discharge sensor failure. | Sensor is short-circuited or open-circuited. |
| 15 | Communication failure. | Communication issue between indoor and outdoor units lasting over 4 minutes. |
| 16 | Refrigerant shortage. | Check for leaks in the system. |
| 17 | 4-way valve failure. | Detected temperature abnormality after heating operation. |
| 18 | Compressor stuck. | Internal compressor issue. |
| 19 | EEV module circuit selection error. | Incorrect EEV module circuit selection. |
| 25 | Compressor phase U overcurrent. | Phase U current is excessively high. |
