Daikin 2MXS40H2V1B Service Manual page 195

SiBE121123_A
Continued from
the previous
page
Check No.11
Refer to P.209
Service Diagnosis
(1)
Does the LED A turn off?
YES
Rotate the
outdoor fan by hand.
Does the outdoor fan rotate
smoothly?
YES
Check No.11
Power supply waveform check
Disturbance?
NO
Turn off the power supply.
Disconnect No. 3 terminal and
turn on the power supply again.
Does the LED A
blink more than 10
times?
YES
Check the relay wire between the
indoor unit and the outdoor unit.
OK?
YES
NO
Check grounding.
Grounded?
YES
NO
YES
NO
Check wrong wiring, insulation
(
among wiring, insulation to ground
NO
Troubleshooting for Outdoor Unit
NO
Carry out grounding work.
The cause seems to be an
external factor other than
the outdoor unit PCB.
Investigate source of noise
and take measures.
Replace both the fan motor
and the outdoor unit PCB.
Investigate the cause of
disturbance and take
remedial action.
Replace the outdoor unit
PCB.
)
Reconnect the relay wire.
Replace the indoor unit
PCB.
(R18132)
184