Daikin Super Multi NX FFQ25B8V1B Service Manual page 324

Troubleshooting for RA Indoor Unit - F(C)TXG, FTXS, ATXS, FVXS, FLK(X)S, FDK(X)S Series
Troubleshooting
Check No.02
Turn off the power supply
Refer to P.363
and rotate the fan by
hand.
Turn the power on and
start operation.
312
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
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
Stop the fan motor.
Check No.02
Check the output of the
fan motor connector
Is the rotation
NO
number
command pulse
generated?
YES
Note : The motor may break when the
Check No.02
Check the output of the
fan motor connector
Is the motor
NO
power supply
voltage 310 ~ 340
VDC generated?
YES
Is the motor
NO
control voltage 15
VDC generated?
YES
Is the
rotation
command YES
voltage 1 ~ 5
VDC
generated?
NO
Is the rotation
NO
number
command pulse
generated?
YES
SiBE121021_C
Replace the fan
motor.
motor connector is disconnected
while remaining power supply.
Replace the indoor
unit PCB.
Replace the indoor
unit PCB.
Replace the fan
motor.
Replace the fan
motor and the
indoor unit PCB.
Replace the indoor
unit PCB.
Replace the fan
motor.
Replace the indoor
unit PCB.
Service Diagnosis
(R14404)