Daikin FTXM-K Series Service Manual page 89

SiBE041434E
Troubleshooting
Check No.11
Refer to P.99
Check the indoor unit - outdoor
unit connection wires.
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.
Check the LED A on the outdoor
unit PCB.
Service Diagnosis
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 Is the
voltage fluctuation voltage fluctuation
within ±10% from the within ±10% from the
rated value? rated value?
YES
Is there any wiring error?
NO
Properly insulated?
YES
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
Troubleshooting
Correct the power supply.
Correct the indoor unit -
outdoor unit connection wires.
Replace the connection wires
between the indoor unit and
outdoor unit.
Diagnose 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.
(R21199)
74