Daikin FTXS09HVJU, Service Manual

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SiUS04-904 Troubleshooting
102 Service Diagnosis
4.4 Fan Motor or Related Abnormality
4.4.1 AC Motor
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 When 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

Operation halt due to short circuit inside the fan motor winding.

Operation halt due to breaking of wire inside the fan motor.

Operation halt due to breaking of the fan motor lead wires.

Operation halt due to faulty capacitor of the fan motor.

Detection error due to faulty indoor unit PCB.
Troubleshooting
Check No.16
Refer to P.151
N O
N O
N O
Check No. 16
Check Hall IC
N O
N O
N O
YES
YES
YES
YES
YES
YES
(R10501)
Caution
Be s u re to t u rn off the po w er s w itch b efore connecting or disconnecting
the connector, or parts damage may occ u r.
Replace the fan motor or control
PCB.
Replace the fan motor.
Replace control PCB.
Replace the capacitor.
(Replace the control PCB.)
Replace the fan motor.
Replace the fan motor.
Replace the control PCB.
Does it rotate?
Is there an o u tp u t?
Is it at the rated
v oltage?
Does it rotate
smoothly?
Is it at the rated
v oltage?
Is there contin u ity?
Operate the fan.
Rotate the fan b y hand.
Check the fan motor v oltage.
Check the fan motor v oltage.
(immediately after restart)
Check the capacitor's contin u ity