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Troubleshooting
Diagnostic procedure for check code
Check code Operation cause
[17] 1. Defective wiring of IPDU PC board.
Current detection circuit alarm 2. Defective IPDU PC board.
Refer to outdoor unit
Is wiring connector on IPDU PC
board normal?
Modify connection of wiring
Check IPDU PC board.
h
j
Ye s
No
Check code Operation cause
[1C] 1. Outdoor unit power source error.
Extension IC, EEPROM short circuit alarm 2. Interface PC board error.
(Outdoor unit error)
Is there an irregularity of outdoor
unit power source?
Check power source voltage.
Modify power source line.
Check noise interference from outside, etc.
Check interface PC board fault code.
h
j
Ye s
No
Is compressor operation normal?
j
Ye s
Compressor error
h
No
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