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36 31-5000572 Rev. 1
ENGLISH
INSTALLATION INSTRUCTIONS
Failure Code
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
• 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 compresor is running, indoor wired controller will display the failure code of outdoor with higher priority.
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board failure, fan motor driving board failure, any protections etc.
Digital tube
indication on
main unit
Failure code definition Failure description Remarks
20-0 Defrosting temp sensor Tdef failure Defrosting temp sensor open circuit or short circuit Resumable
21 Ambient temp sensor Ta failure Temp sensor open circuit or short curcuit Resumable
22-2 Ts(acc) failure
23-0 Discharging temp sensor Td1 failure Temp sensor open circuit or short curcuit Resumable
23-1
24-0 Modular heat sensor Th failure Temp sensor open circuit or short curcuit Resumable
24-1 Oil temp sensor Toil1 failure Temp sensor open circuit or short curcuit
24-2 Oil temp sensor Toil2 failure
25-0 Inlet temp of heat exchanger Toci1
failure
Temp sensor open circuit or short curcuit Resumable
26-0 Indoor commuication failure For continuous 200 cycles, can not find connected indoors Resumable
26-1 For continuous 270 s, the searched indoor quantity is less than the
set quantity
26-2 For continuous 170 s, the searched indoor quantity is more than
the set quantity
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