SiBE18-821_C Troubleshooting for RA Indoor Unit
Troubleshooting 357
Troubleshooting
Check No.01
Refer to P.360
Turn off the power supply
and disconnect the fan
motor connector, then
turn the power on.
Check No.01
Check the output of the
fan motor connector
YES
YES
NO
YES
YES
NO
NO
NO
Note : The motor may break when the
motor connector is disconnected
while remaining power supply.
Caution
Replace the fan
motor.
Replace the indoor
unit PCB.
Replace the indoor
unit PCB.
Does the fan rotate
smoothly?
Does the fan
rotate?
Is the motor
control voltage 15
VDC generated?
Turn off the power supply
and rotate the fan by
hand.
Turn the power on and
start operation.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Check No.01
Check the output of the
fan motor connector
(R11293)
NO
YES
YES
NO
YES
NO
Replace the indoor
unit PCB.
Replace the indoor
unit PCB.
Replace the fan
motor.
Replace the fan
motor.
Replace the fan
motor and the
indoor unit PCB.
Is the
rotation number
command pulse
generated?
Is the
rotation
command voltage
1 ~ 5 VDC
generated?
Is the
rotation number
command pulse
generated?
Stop the fan motor.
Is the
motor power
supply voltage
310 ~ 340 VDC
generated?
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