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Failure code
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 classified as below: sensor failure,
inverter board failure, fan motor driving board failure, any protections etc.
Outdoor unit failure code
Digital tube
indication
Failure code definition
on master
unit
Defrosting temp.sensor
20-0
Tdeffailure
Ambient temp.sensor Ta
21
failure
Suction temp.sensor
22-2
Ts(acc) failure
Discharging temp.
23-0
sensor Td1 failure
Discharging temp.
23-1
sensor Td2 failure
Modular heat sensor Th
24-0
failure
Oil temp.sensor Toil1
24-1
failure
Oil temp.sensor Toil2
24-2
failure
Inlet temp.of heat
25-0
exchanger Toci1 failure
26-0
26-1
Indoor communication
failure
26-2
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
AD value is below 11(open circuit) or over 1012(short circuit)for 60
seconds
AD value is below 11(open circuit) or over 1012(short circuit)for 60
seconds
AD value is below 11(open circuit) or over 1012(short circuit)for 60
seconds
AD value is below 11(open circuit) or over 1012(short circuit)for 60
seconds
AD value is below 11(open circuit) or over 1012(short circuit)for 60
seconds
For continuous 200 cycles,can not find connected indoors
For continuous 270 seconds,the searched indoor quantity is less
than the set quantity
For continuous 170 seconds,the searched indoor quantity is more
than the set quantity
35
Failure description
Remarks
resumable
resumable
resumable
resumable
resumable
resumable
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