Daikin FTKN09NMVJU Service Manual page 80

Troubleshooting
Troubleshooting
Check No.11
Refer to P.93
69
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check the power supply voltage.
Is the
voltage fluctuation
within ±10% from the
rated value?
YES
Check the indoor unit - outdoor
unit connection wires.
Is there any wiring error?
NO
Check the voltage of the
connection wires on the indoor
terminal board between No. 1
and No. 3, and between No. 2
and No. 3.
Properly insulated?
YES
Check the LED A on the outdoor
unit PCB.
Is LED A blinking?
Blink
Rotate the
outdoor fan by hand.
Does the outdoor fan rotate
smoothly?
YES
Check No.11
Check the power supply
waveform.
Is there any disturbance?
YES
NO
YES
NO
∗ Before you check the LED A, cancel
the standby electricity saving
function by starting fan operation
with the remote controller.
∗ Wait at least for 7 sec. after turning
on the power.
Continuously ON or OFF
NO
NO
SiUS041501E
Correct the power supply.
Correct the indoor unit -
outdoor unit connection wires.
Replace the connection wires
between the indoor unit and
outdoor unit.
Replace the outdoor unit PCB
(main PCB).
Replace the outdoor fan motor
and the outdoor unit PCB
(main PCB).
Replace the indoor unit PCB
(control PCB).
Locate the cause of the
disturbance of the power
supply waveform, and correct
it.
(R21189)
Service Diagnosis