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INSTALLATION INSTRUCTIONS
Failure Codes
Failure code description: (failure code of the whole system is showed as 8 bits, so 256 codes. Indoor failure code is listed
in the table and by 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
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 main unit:
Dip switch SW9, SW10, SW11 are at 0, 0, 0, digital tube displays failure code 20~127, it is the main 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 sub unit.
Dip switch SW9, SW10, SW11 are 2, 0, 0, digital tube displays failure code 20~127, it is failure code of No. 2 sub unit.
Physical sub unit:
Dip switch SW9, SW10, SW11 are at 0, 0, 0, digital tube displays failure code 20~127, it is single sub 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.
inverter board failure, fan motor driving board failure, any protections etc.
Digital tube
Failure code definition
indication on
main unit
20-0
Defrosting temp sensor Tdef failure
21
Ambient temp sensor Ta failure
22-2
Ts(acc) failure
23-0
Discharging temp sensor Td1 failure
23-1
Discharging temp sensor Td2 failure
24-0
Modular heat sensor Th failure
24-1
Oil temp sensor Toil1 failure
24-2
Oil temp sensor Toil2 failure
25-0
Inlet temp of heat exchanger Toci1
failure
26-0
Indoor commuication failure
26-1
26-2
42
Failure description
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 over1012(short circuit) for 60
seconds.
AD value is below 11(open circuit) or over1012(short circuit) for 60
seconds.
AD value is below 11(open circuit) or over1012(short circuit) for 60
seconds.
AD value is below 11(open circuit) or over1012(short circuit) for 60
seconds.
AD value is below 11(open circuit) or over1012(short circuit) for 60
seconds.
For continuous 200 cycles, can not find connected indoors.
For continuous 270 s, the searched indoor quantity is less than the
set quantity.
For continuous 170 s, the searched indoor quantity is more than
the set quantity.
Remarks
Resumable
Resumable
Resumable
Resumable
Resumable
Resumable
49-5000878 Rev. 0
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