Haier MRV 5-RC AB482MRERA User Manual

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Failure code description: (failure code of the whole system is showed as 8 bits, so totally 256 codes. Indoor failure
code should be judged by the table and the unit number)
• Outdoor failure code exists in EEPROM, in which 5 failure codes can be kept.
• Indoor failure code exists in EEPROM, in which 5 failure codes can be kept.
• Can clear failure code by indoor or outdoor.
Failure codes are distributed as following:
0~19: indoor failure code
20~99: outdoor failure code
100~109: DC motor failure code
110~125: inverter module failure code
126~127: soft auto-check failure code
Physical master unit:
Dip switch SW9, SW10, SW11 are at 0, 0, 0, digital tube displays failure code 20~127, it is the master failure code.
Dip switch SW9, SW10, SW11 are 1, 0, 0, digital tube displays failure code 20~127, it is failure code of No. 1 slave
unit.
Dip switch SW9, SW10, SW11 are 2, 0, 0, digital tube displays failure code 20~127, it is failure code of No. 2 slave
unit.
Physical slave unit:
Dip switch SW9, SW10, SW11 are at 0, 0, 0, digital tube displays failure code 20~127, it is single slave unit failure
code.
Outdoor failure code display principle on wired controller:
When outdoor compressor is running, indoor wired controller will display the failure code of outdoor with higher
priority. When compressor stops, it displays all indoor failures. The indoor failures will be classied as below: sensor
failure, inverter board failure, fan motor driving board failure, any protections etc.
Outdoor unit failure code
Digital tube
indication
on master
unit
Failure code denition Failure description Remarks
20-0
Defrosting temp.sensor
Tdeffailure
AD value is below 11(open circuit) or over 1012(short circuit)for 60
seconds,in cooling mode,if the sensor is abnormal,the unit does
not deal with it,besides,in defrosting and within 3 minutes after
defrosting,no alarm
resumable
21
Ambient temp.sensor
Ta failure
AD value is below 11(open circuit) or over 1012(short circuit)for 60
seconds
resumable
22-2
Suction temp.sensor
Ts(acc) failure
23-0
Discharging temp.
sensor Td1 failure
AD value is below 11(open circuit) or over 1012(short circuit)for 60
seconds
resumable
23-1
Discharging temp.
sensor Td2 failure
24-0
Modular heat sensor
Th failure
AD value is below 11(open circuit) or over 1012(short circuit)for 60
seconds
resumable24-1
Oil temp.sensor Toil1
failure
AD value is below 11(open circuit) or over 1012(short circuit)for 60
seconds
24-2
Oil temp.sensor Toil2
failure
25-0
Inlet temp.of heat
exchanger Toci1 failure
AD value is below 11(open circuit) or over 1012(short circuit)for 60
seconds
resumable
26-0
Indoor communication
failure
For continuous 200 cycles,can not nd connected indoors
resumable
26-1
For continuous 270 seconds,the searched indoor quantity is less
than the set quantity
26-2
For continuous 170 seconds,the searched indoor quantity is more
than the set quantity
4. Failure code

Haier MRV 5-RC AB482MRERA Specifications

General

Brand	Haier
Model	MRV 5-RC AB482MRERA
Category	Heat Pump
Language	English