Daikin VRV IV-S RXTQ-TAVJU Series Service Manual page 157

SiUS331604E
Troubleshooting
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn off the power and wait for
10 minutes.
There is a
foreign matter around
the fan.
NO
The fan
motor connectors (X1A
and X2A) of the fan PCB (A2P)
are disconnected.
NO
The connectors
between the indoor unit
PCB (A1P) and the fan
PCB (A2P) are
disconnected.
NO
The fuse (F3U, white)
on the fan PCB (A2P)
has no continuity.
YES
The fan
can be moved lightly
by hand after the fan motor
connector of the fan PCB
(A2P) is removed.
YES
The
resistance
between the power wire
terminals of the fan motor and
motor frame (metal part)
is 1 MΩ or
below.
NO
Remove the power wire
connector from the fan motor
and measure the resistance
between U and V, V and W, and
W and U phases (∗1).
A
YES
YES
YES
NO
NO
YES
Troubleshooting by Error Code
Remove the foreign matter.
Connect the connector
properly.
Connect the connector
properly.
Replace the fan PCB (A2P).
Replace the indoor fan
motor.
Replace the indoor fan
motor.
144