SiBE121135
Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS, FDXS Series
Service Diagnosis
277
5.3.2 AC Motor (Duct Connected Type, Floor / Ceiling Suspended Dual Type)
Remote
Controller
Display
A6
Method of
Malfunction
Detection
The rotation speed detected by the Hall IC during fan motor operation is used to determine
abnormal fan motor operation.
Malfunction
Decision
Conditions
The detected rotation speed does not reach the demanded rotation speed of the target tap, and
is less than 50% of the maximum fan motor rotation speed.
Supposed
Causes
Layer short inside the fan motor winding
Breaking of wire inside the fan motor
Breaking of the fan motor lead wires
Defective capacitor of the fan motor
Defective indoor unit PCB
Troubleshooting
Check No.04
Refer to P.327
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
(R16009)
Caution
Replace the fan motor or the
indoor unit PCB.
Replace the fan motor.
Replace the indoor unit PCB.
Replace the capacitor.
(Replace the indoor unit PCB.)
Replace the fan motor.
Replace the fan motor.
Replace the indoor unit PCB.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
∗
Measure the voltage
between the red and black
lead wires of the fan motor,
and check if the maximum
voltage reaches the rated
voltage.
Check No. 04
Check Hall IC
Is there an output?
Check the fan motor voltage.
Voltage as rated?
∗
Start operation.
Does the fan rotate?
Turn off the power supply and
rotate the fan by hand.
Does the fan rotate
smoothly?
Turn the power on and check the
fan motor voltage. (immediately
after restart)
Voltage as rated?
∗
Check the capacitor's continuity.
Is there continuity?
