Fan Motor Or Related Abnormality - Daikin 2MKS40G2V1B Service Manual

SiBE12-816_D
5.3

Fan Motor or Related Abnormality

5.3.1 AC Motor (Duct Connected Type, Floor / Ceiling Suspended Dual Type)
A6
Remote
Controller
Display
Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine
abnormal fan motor operation.
Malfunction
Detection
Malfunction 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.
Decision
Conditions
Supposed
Causes
Troubleshooting
Check No.04
Refer to P.262
Service Diagnosis
Troubleshooting for RA Indoor Unit - F(C)TXG, FTXS, FVXS, FLK(X)S, FDK(X)S Series
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
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Start operation.
Does the fan rotate?
NO
Turn off the power supply and
rotate the fan by hand.
Does the fan rotate
smoothly?
YES
Turn the power on and check the
fan motor voltage. (immediately
after restart)
Is it the rated voltage? ∗
YES
Check the capacitor's continuity.
Is there continuity?
NO
YES
Check No. 04
Check Hall IC
Is there an output?
NO
YES
Check the fan motor voltage.
Is it the rated voltage? ∗
YES
∗ Measure the voltage
between the red and black
lead wires of the fan motor,
and check if the maximum
voltage reaches the rated
NO voltage.
YES
NO
Replace the fan motor or the
indoor unit PCB.
Replace the fan motor.
NO
Replace 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.
(R14403)
218