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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.
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
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
36
Failure description
Defrosting temp sensor open circuit or short circuit
Temp sensor open circuit or short curcuit
Temp sensor open circuit or short curcuit
Temp sensor open circuit or short curcuit
Temp sensor open circuit or short curcuit
Temp sensor open circuit or short curcuit
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
31-5000572 Rev. 1
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