Daikin FTXN25KEV1B Service Manual page 71

SiBE041102_A
Troubleshooting
Check No.11
Check the power supply voltage.
Refer to P.88
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.
Voltage as rated?
YES
Is there any wiring error?
NO
Properly insulated?
NO
Is LED A blinking?
YES
Check No.11
Check the power supply
waveform.
Is there any disturbance?
YES
NO
YES
YES
∗ Before you check the LED A, cancel
the standby electricity saving
function by operating fan operation
with the remote controller.
∗ Wait at least for 7 sec. after turning
on the power.
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.
Replace the indoor unit PCB.
Locate the cause of the
disturbance of the power
supply waveform, and correct
it.
(R15198)
61