Daikin J Series Service Manual page 87

SiBE041012
Troubleshooting
Check No.01
Turn off the power supply
Refer to P.107
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.01
Check the output of the
fan motor connector
Is the rotation
NO
pulse generated?
YES
Note : The motor may break when the
Check No.01
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
YES
command voltage
1 ~ 6 VDC
generated?
NO
Is the rotation
NO
pulse generated?
YES
Troubleshooting
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
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.
(R12033)
77