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SiBE12-933_A
Troubleshooting
Service Diagnosis
179
Troubleshooting
F(A)TXS20-50G, F(C)(A)TXG25-50E, FVXS25-50F
Check No.01
Refer to P.212
(R9320)
Turn off the power supply
and rotate the fan by hand.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Does the fan rotate
smoothly?
Check No.01
Turn the power ON and
operate the fan.
Does it rotate?
NO
YES
YES
NO
Turn off the power supply
and disconnect the fan
motor connector, then
turn the power ON.
Check output of the fan
motor connector
Is the motor
power voltage
DC 200V
generated?
NO
NO
YES
YES
Is the motor
control power
voltage DC 15V
generated?
Turn off the power supply
and disconnect the fan
motor connector, then
turn the power ON again.
Check No.01
Check output of the fan
motor connector
Is the rotation
number command
voltage DC 1~6V
generated?
Check No.01
Check output of the fan
motor connector
Is the rotation
number command
pulse generated?
Stop the fan motor.
Check No.01
Check output of the fan
motor connector
Is the rotation
number command
pulse generated?
YES
NO
YES
NO
YES
NO
Replace the indoor
unit PCB.
Replace the fan
motor.
Replace the indoor
unit PCB.
Replace the fan
motor.
Note : The motor
may break
when the
motor
connector is
disconnected
while
remaining
power supply.
Replace the fan
motor and indoor
PCB.
Replace the indoor
unit PCB.
Replace the fan
motor.
Replace the indoor
unit PCB.