Haier Commercial Air Conditioning, Fault Code List for H-MRV Indoor Unit
| Models with wired controller | Fault description-Models with remote controller |
|---|---|
| E3 | Fault in liquid pipe temp. sensor. 1 flash of Timer indicator |
| E4 | Fault in suction pipe temp. sensor. 2 flashes of Timer indicator |
| E9 | Communication error between indoor and outdoor units. 4 flashes of Timer indicator |
| E7 | Communication error between indoor unit and PCB of PMV valve. 5 flashes of Timer indicator |
| E5 | Communication error between 846 and 808 chips. 6 flashes of Timer indicator |
| E0 | Fault in float switch or pump motor. 11 flashes of Timer indicator |
| E1 | Fault in outdoor unit |
| E8 | Communication error between wired controller and indoor unit PCB |
AU482FIBHA Fault Code List
| Digital readout | Description |
|---|---|
| 01 | The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. The fault is fixable |
| 02 | The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. The fault is fixable |
| 03 | The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. The fault is fixable. |
| 04 | After 3 minutes of compressor operation, the detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. Fixable when below 80°C. |
| 05 | The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. |
| 06 | An alarm is given five seconds after the current limit is exceeded. Where there are 3 alarms within 30 minutes, the fault code is displayed. The fault is not fixable |
| 07 | When the compressor is shut off, the detected current of current sensor is above 15A, and when the compressor is started, the operating frequency is above 60Hz and the detected current is below 5A. The fault is fixable. |
| 08 | The overload protector of inverter compressor is activated. |
| 09 | IPM overcurrent, short-circuit, overtemperature and undervoltage. When the fault occurs three times within 30 minutes, an alarm is given and the fault is not fixable. |
| 10 | 857 EEPROM data access error, 11 flashes. The fault is not fixable. |
| 11 | When the compressor is started, the temperature detected by TD1 sensor is above 120°C. The compressor is shut off in 5 seconds and an alarm is given. Where there are 3 alarms within 30 minutes, the fault code 11 is displayed. The fault is not fixable. |
| 13 | Pressure switch is activated. The fault is corrected after the normal pressure is restored for 2 minutes. |
| 16 | After the compressor has operated for 10 minutes, the temperature detected by TS sensor is above 40°C. Corrected in 2 minutes. |
| 19 | When the inverter compressor operates at a frequency of S3 and S4, the temperature detected by TD1 sensor is above 110°C. |
| 20 | 200 times of failure in transmission. An alarm is given and the indicator flashes. |
| 21 | 200 times of failure in transmission. The fault code is displayed. |
| 22 | Receiving no signals from indoor unit for 4 minutes. The fault code 22 is displayed. |
| 23 | An alarm is given and the fault code is displayed. |
Note: The model is provided with 1 high-pressure switch and 1 low-pressure switch in series. The compressor features a built-in compressor overload protector.
AU242FHBHA Fault Code List
| Number of flashes by fault indicator | Description |
|---|---|
| 1 | The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. The fault is fixable. |
| 2 | The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. The fault is fixable. |
| 3 | The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. The fault is fixable. |
| 4 | After 3 minutes of compressor operation, the detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. Fixable when below 80°C. |
| 5 | The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. |
| 6 | An alarm is given five seconds after the current limit is exceeded. Where there are 3 alarms within 30 minutes, the fault code is displayed. The fault is not fixable. |
| 9 | IPM overcurrent, short-circuit, overtemperature and undervoltage. When the fault occurs three times within 30 minutes, an alarm is given and the fault is not fixable. |
| 10 | 857 EEPROM data access error, 11 flashes. The fault is not fixable. |
| 11 | After the compressor is started, the temperature detected by TD1 sensor is above 120°C. The compressor is shut off in 5 seconds and an alarm is given. Where there are 3 alarms within 30 minutes, the fault code 11 is displayed. The fault is not fixable. |
| 12 | 857-to-809 transmission error |
| 13 | The high pressure switch is activated. The fault is corrected after the normal pressure is restored for 2 minutes. |
Haier MRV S Fault Code List
| Digital tube indication on master unit | Failure code definition |
|---|---|
| 20 | Defrosting temp. sensor TE1 failure |
| 20-1 | Defrosting temp. sensor TE2 failure |
| 21 | Ambient temp. sensor Ta failure |
| 22 | Suction temp. sensor Ts failure |
| 23 | Discharging temp. sensor Td failure |
| 24 | Oil temp. sensor Toil failure |
| 26-0 | Indoor communication failureI |
| 26-1 | Indoor communication failureI |
| 26-2 | Indoor communication failureI |
| 27 | Oil temp.too high protection (Toil) |
| 28 | High pressure sensor Pd failure |
| 29-1D | Low pressure sensor Ps failure |
| 30 | High pressure switch HPSi failure |
| 33 | EEPROM failure |
| 34 | Discharging temp. too high protection (Td) |
| 35 | 4-way valve reversing failure |
| 36 | Oil temp. too low protection (Toil) |
| 39-0 | Low pressure sensor Ps too low protection |
| 39-1 | Compression ratio too high protection |
| 39-2 | Compression ratio too low protection |
| 40 | High pressure sensor Pd too high protection |
| 43 | Discharging temp. sensor Td too low protection |
| 46 | Communication with inverter board failure |
| 71 | DC motor blocked |
| 75 | No pressure drop between high pressure and low one |
| 78 | Lack of refrigerant |
| 110 | IPM modular protection (F0) |
| 111 | Compressor out of control |
| 112 | Radiator of transducer temp.too high |
| 113 | Transducer overload |
| 114 | Voltage too low of DC bus line of transducer |
| 115 | Voltage too high of DC bus line of transducer |
| 116 | Communication abnormal between transducer and control PCB |
| 117 | Transducer over current (software) |
| 118 | Compressor startup failure |
| 120 | Power supply of transducer abnormal |
| 121 | Power supply of inverter board is abnormal |
| 122 | Radiator temp. sensor of transducer abnormal |
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