Daikin Super multi NX E Series Service Manual page 185

SiBE121135_A
Troubleshooting
FTXG, FTXS35/42/50K, FTXS-J, FTXS-G, ATXS, FVXG, FVXS Series
Check No.02
Refer to P.231
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check the power supply
voltage.
Is the
voltage fluctuation
within ±10% from the
rated value?
YES
Turn off the power supply
and rotate the fan by hand.
Does the fan
rotate smoothly?
YES
Turn the power on and start
operation.
NO
Does the fan
rotate?
YES
Stop the fan motor.
Check No.02
Check the output of the fan
motor connector
Is the rotation pulse
generated?
YES
NO
NO
Turn off the power supply and
disconnect the fan motor
connector, then turn the
power on.
Check No.02
Check the output of the fan
motor connector
Is the motor
power supply voltage
310 ~ 340 VDC
generated?
YES
Is the motor
control voltage 15 VDC
generated?
YES
Is the
rotation command
voltage 1 ~ 5 VDC
generated?
NO
Is the
rotation pulse
generated?
YES
NO
Troubleshooting for RA Indoor Unit
Correct the power
supply.
Replace the indoor
fan motor.
Note: The motor may break when the
motor connector is disconnected
while remaining power supply.
(Turn off the power supply before
connecting the connector also.)
NO
Replace the indoor
unit PCB.
NO
Replace the indoor
unit PCB.
YES
Replace the indoor
fan motor.
NO
Replace the indoor
fan motor and the
indoor unit PCB.
Replace the indoor
unit PCB.
Replace the indoor
fan motor.
Replace the indoor
unit PCB.
(R18469)
174