Daikin G-Series Service Manual page 189

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