Daikin FTKS20D3VMW Service Manual page 256

SiENBE12-713
Troubleshooting
Check No.10
Refer to P.282
Service Diagnosis
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Check the indoor unit-outdoor unit
connection wires.
Is there any wiring error?
NO
Check the outdoor unit's LED A.
Is LED A flashing?
YES
Check the voltage of the indoor
unit-outdoor unit connection wires
between No. 1 and No. 2, and
between No 2 and No. 3.
Is the voltage 0 V?
NO
Rotate fan by hand.
Does fan rotate
smoothly?
YES
Check No. 10
Check power supply waveform.
Is there any disturbance?
YES
YES
NO
YES
NO
NO
Troubleshooting
Correct the indoor unit-outdoor
unit connection wires.
Diagnose the outdoor unit.
Replace the connection wires
between the indoor and
outdoor units.
Replace fan motor and
outdoor unit PCB .
Replace indoor unit control
PCB .
Locate the cause of the
disturbance of the power supply
waveform, and correct it.
(R6471)
245