Daikin RMXS-L Series Service Manual page 170

Troubleshooting for CTXS, FTXS, CDXS, FDXS Series
Troubleshooting
Check the power supply
Check No.02
voltage.
Refer to P.166
Turn off the power supply
and rotate the fan by
hand.
Turn the power on and
start operation.
Check No.02
Check the output of the
fan motor connector
161
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the
voltage
NO
fluctuation
within ±10% from
the rated
value?
YES
NO
Does the fan
rotate smoothly?
YES
Turn off the power supply
NO
and disconnect the fan
Does the fan
motor connector, then
rotate?
turn the power on.
YES
Check No.02
Check the output of the
fan motor connector
control voltage 15
Stop the fan motor.
NO
Rotation pulse
generated?
YES
Note: The motor may break when the
Motor
NO
power supply
voltage 310 ~ 340
VDC?
YES
Motor
NO
VDC generated?
YES
Rotation
NO
command voltage
1 ~ 5 VDC or
higher?
YES
NO
Rotation pulse
generated?
YES
Correct the power
supply.
Replace the indoor
fan motor.
motor connector is disconnected
while remaining power supply.
(Turn off the power supply before
connecting the connector also.)
Replace the indoor
unit PCB.
Replace the indoor
unit PCB.
Replace the indoor
unit PCB.
Replace the indoor
fan motor.
Replace the indoor
unit PCB.
Replace the indoor
fan motor.
Replace the indoor
unit PCB.
SiUS181305E
(R19157)
Troubleshooting