Haier MRV Air Conditioner Error Codes – Here Are The Solutions

Haier MRV systems may encounter various error codes to indicate specific issues or malfunctions. However, without specific error codes or additional context, it is challenging to provide detailed troubleshooting steps. Nevertheless, here are some common Haier Vrf error codes along with their potential causes.

H-MRV Codes List

Commercial Air Conditioning

Models with wired controllerFault description-Models with remote controller
E3Fault in liquid pipe temp. sensor. 1 flash of Timer indicator
E4Fault in suction pipe temp. sensor. 2 flashes of Timer indicator
E9Communication error between indoor and outdoor units. 4 flashes of Timer indicator
E7Communication error between indoor unit and PCB of PMV valve. 5 flashes of Timer indicator
E5Communication error between 846 and 808 chips. 6 flashes of Timer indicator
E0Fault in float switch or pump motor. 11 flashes of Timer indicator
E1Fault in outdoor unit
E8Communication error between wired controller and indoor unit PCB

AU482FIBHA Model Codes

Digital readoutDescription
01The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. The fault is fixable
02The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. The fault is fixable
03The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. The fault is fixable.
04After 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.
05The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds.
06An 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
07When 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.
08The overload protector of inverter compressor is activated.
09IPM 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.
10857 EEPROM data access error, 11 flashes. The fault is not fixable.
11When 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.
13Pressure switch is activated. The fault is corrected after the normal pressure is restored for 2 minutes.
16After the compressor has operated for 10 minutes, the temperature detected by TS sensor is above 40°C. Corrected in 2 minutes.
19When the inverter compressor operates at a frequency of S3 and S4, the temperature detected by TD1 sensor is above 110°C.
20200 times of failure in transmission. An alarm is given and the indicator flashes.
21200 times of failure in transmission. The fault code is displayed.
22Receiving no signals from indoor unit for 4 minutes. The fault code 22 is displayed.
23An 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 Model Codes

Number of flashes by fault indicatorDescription
1The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. The fault is fixable.
2The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. The fault is fixable.
3The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds. The fault is fixable.
4After 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.
5The detected sensor value is below 20H (open-circuit) or above 1000H (short-circuit) for 60 seconds.
6An 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.
9IPM 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.
10857 EEPROM data access error, 11 flashes. The fault is not fixable.
11After 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.
12857-to-809 transmission error
13The high pressure switch is activated. The fault is corrected after the normal pressure is restored for 2 minutes.
Haier MRV Air Conditioner Fault Codes
Haier MRV Air Conditioner Fault Codes

MRV S Codes

Digital tube indication on master unitFailure code definition
20Defrosting temp. sensor TE1 failure
20-1Defrosting temp. sensor TE2 failure
21Ambient temp. sensor Ta failure
22Suction temp. sensor Ts failure
23Discharging temp. sensor Td failure
24Oil temp. sensor Toil failure
26-0Indoor communication failureI
26-1Indoor communication failureI
26-2Indoor communication failureI
27Oil temp.too high protection (Toil)
28High pressure sensor Pd failure
29-1DLow pressure sensor Ps failure
30High pressure switch HPSi failure
33EEPROM failure
34Discharging temp. too high protection (Td)
354-way valve reversing failure
36Oil temp. too low protection (Toil)
39-0Low pressure sensor Ps too low protection
39-1Compression ratio too high protection
39-2Compression ratio too low protection
40High pressure sensor Pd too high protection
43Discharging temp. sensor Td too low protection
46Communication with inverter board failure
71DC motor blocked
75No pressure drop between high pressure and low one
78Lack of refrigerant
110IPM modular protection (F0)
111Compressor out of control
112Radiator of transducer temp.too high
113Transducer overload
114Voltage too low of DC bus line of transducer
115Voltage too high of DC bus line of transducer
116Communication abnormal between transducer and control PCB
117Transducer over current (software)
118Compressor startup failure
120Power supply of transducer abnormal
121Power supply of inverter board is abnormal
122Radiator temp. sensor of transducer abnormal

Manual Pdf

Download Haier MRV 5 Series Troubleshooting Manual

Haier Aircon Error Codes



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