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SiUS091601EA
Troubleshooting for FTX, FVXS Series
Part 6 Service Diagnosis
130
Troubleshooting
FTX18/24UVJU, FVXS Series
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Correct the power
supply.
NO
Check the power supply
voltage.
Turn off the power and
disconnect the fan motor
connector, then turn the
power on.
Check No.02
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 the power is turned on.
(Be sure to turn off the power
before reconnecting the
connector.)
Replace the indoor
fan motor.
Replace the indoor
unit PCB (control
PCB).
Replace the indoor
unit PCB (control
PCB).
Does the fan
rotate smoothly?
Does the fan
rotate?
Motor
power supply
voltage 310 ~ 340
VDC?
Turn off the power and
rotate the fan by hand.
Turn on the power and
start operation.
Check No.02
Check the output of the
fan motor connector.
(R22444)
YES
NO
YES
NO
YES
NO
Replace the indoor
fan motor.
Replace the indoor
unit PCB (control
PCB).
Replace the indoor
unit PCB (control
PCB).
Replace the indoor
unit PCB (control
PCB).
Replace the indoor
fan motor.
Stop the fan motor.
YES
Is the
voltage
fluctuation
within ±10% from
the rated
value?
Motor
control voltage 15
VDC generated?
Rotation
command voltage
1 ~ 6.5 VDC?
Indoor fan
motor rotation pulse
generated?
Indoor fan
motor rotation pulse
generated?
Summary of Contents for FTX-N Series
Page 18: ...SiUS091601EA 13 Part 2 Specifications 1 Specifications 14 Part 2 Specifications...
Page 198: ...Check SiUS091601EA 193 Part 6 Service Diagnosis 18 24 class R24538 1 2 3 4 Multimeter...
Page 201: ...SiUS091601EA Check Part 6 Service Diagnosis 196 18 24 class R24539 DC DC W V U...
Page 229: ...SiUS091601EA Piping Diagrams Part 8 Appendix 224 RXL15QMVJU RXL18UMVJU 3D100007 3D123368...
Page 230: ...Piping Diagrams SiUS091601EA 225 Part 8 Appendix RXL24UMVJU 3D107985A...