Daikin VRV-WIII RWEYQ72PTJU Service Manual page 164

Troubleshooting by Indication on the Remote Controller
Troubleshooting
156
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn OFF the power
supply, and then wait for
a period of 10 minutes.
Are
there any
YES
foreign matters around
the fan?
NO
Is the
connector
(X4A or X20A)
NO
for the fan motor
properly connected to
the indoor unit
PCB? (∗1)
YES
By
disconnecting
the connector
(X4A or X20A) for the
NO
fan motor from the indoor
unit PCB, the fan can
be lightly rotated
YES
by hand.
YES
Disconnect the connector
from the fan motor, and
then make measurement
of resistance between
pins. (∗2)
Is the
resistance
between the pins NO
more than the
judgement
criteria?
YES
SiUS30-1301
Remove the foreign matters.
Properly connect the connector.
Replace the fan motor.
Replace the fan motor.
Replace the indoor unit PCB.
Service Diagnosis