Specifications

SiBE04-624 Troubleshooting
Service Diagnosis 193
Check No.8
Refer to P.204
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.
(R3452)
Disturbance?
YES
NO
Grounded?
YES
YES
Turn off the power supply.
Disconnect No. 3 terminal and
turn on the power supply again.
Does
LED A flashing more
than 10 times?
NO
YES
Check relay wire between indoor
unit and outdoor unit.
Check wrong wiring, insulation
among wiring, insulation to ground
Check grounding
Is it OK?
NO
YES
Does LED A turn off?
Continued from
the previous
page

NO
Check No.8
Power supply waveform check
()