Daikin SUPER MULTI NX CTXS07JVJU Service Manual page 159

Troubleshooting for Indoor Unit
Troubleshooting
Check No.02
Turn off the power supply
Refer to P.192
and rotate the fan by
hand.
Turn the power on and
start operation.
Check No.02
Check the output of the
fan motor connector
151
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
Check No.02
Check the output of the
fan motor connector
supply voltage 310
Stop the fan motor.
Is the rotation
NO
pulse
generated?
YES
Note : The motor may break when the
Is the
motor power
NO
~ 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
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.
Service Diagnosis
SiUS12-928_B
(R14970)