SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)
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(2) IPM protection, desynchronizing malfunction, phase current of compressor is overcurrent (outdoor unit malfunction)
Outdoor unit malfunction indicator status
Malfunction D5 D6 D16 D30
IPM protection
Desynchronizing
malfunction
Compressor
overcurrent
Detection:
If control board AP1 and compressor COMP are well
connected? If they are loose? If the connection se-
quence is correct?
Is voltage input in the normal range (Test the voltage
between L, N of wiring board XT by DC voltage meter)?
If coil resistance of compressor is normal?
If the work load of unit is heavy? If the refrigerant char-
ging is appropriate?
Malfunction diagnosis process:
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