Daikin CTXU25G2V1B Service Manual page 155

Troubleshooting
Continued from
the previous
page
Check No.08
Refer to P.164
152
Does LED A turn off?
YES
Check No.08
Power supply waveform check
Disturbance?
NO
Turn off the power supply.
Disconnect No. 3 terminal and
turn on the power supply again.
Does LED A
flashing more than
10 times?
YES
Check relay wire between indoor
unit and outdoor unit.
Is it OK?
YES
NO
Check grounding
Grounded?
YES
YES
NO
Check wrong wiring, insulation
(
among wiring, insulation to ground
NO
SiBE12-908
NO
Carry out grounding work.
The cause seems to be an
external factor other than
failure of the outdoor unit
PCB.
Investigate source of noise
and take measures.
Investigate the cause of
disturbance and take
remedial action.
Replace outdoor unit PCB.
)
Reconnect relay wire.
Replace indoor unit PCB.
(R9453)
Service Diagnosis