Daikin 2MXS40H2V1B Service Manual page 173

SiBE121123_A
Troubleshooting FTXG, FTXS35/42/50K, FTXS-J, ATXS, FVXG, FVXS Series
Check No.02
Turn off the power supply
Refer to P.207
and rotate the fan by
hand.
Turn the power on and
start operation.
Service Diagnosis
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
pulse
generated?
YES
Note : The motor may break when the
Check No.02
Check the output of the
fan motor connector
Is the
motor power
NO
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
pulse generated?
YES
Troubleshooting for RA Indoor Unit
Replace the indoor
fan motor.
motor connector is disconnected
while remaining power supply.
Replace the indoor
unit PCB.
Replace the indoor
unit PCB.
Replace the indoor
fan motor.
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.
(R14970)
162