SERVICE MANUAL
R
−
410A Ductless Split System: DLF4(A/H), DLC4(A/H)
421 08 9204 00
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(5) Diagnosis for compressor synchronization (outdoor unit malfunction)
Outdoor unit malfunction indicator status
D5
D6
D16
D30
Detection:
If the system pressure is too high?
If the working voltage is too low?
Malfunction diagnosis process:
If the compressor
wire COMP(UVW) is well connected, the
connection sequence forwards to
clockwise direction?
Check if the fan
terminal OFAN is
connected well
Replace
compressor
If the outdoor fan works
normally?
If the stop time of
compressor is more than
3min
End
Synchronization after
energizing the unit
and starting it
Connect
wire well
Synchronization
during operation
Replace
control board
AP1
If the radiating of unit is
well?
Remove
malfunction?
Improve the radiating
of unit (clean heat
exchanger and
increase ventilation)
Replace fan
capacitor C1
Replace
outdoor fan
End
Y
N
N
N
Y
Y
N
Replace
control board
AP1
Remove
malfunction?
Replace
compressor
Y
N
N
Y
If the input voltage of unit
is normal?
Start to run until the
power resume normal
voltage
N
If the refrigerant is too
much?
Charge the
refrigerant with
service manual
Y
Y
N
Y
