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SiENBE12-713
Troubleshooting
Service Diagnosis
239
5.5
Fan Motor or Related Abnormality
5.5.1 AC Motor
Remote Control
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 control PCB.
Troubleshooting
Check No.16
Refer to P.285
Rotate the fan by hand.
Check No. 16
Check Hall IC
Operate the fan.
Does it rotate?
NO
Does it rotate smoothly?
Is there an output?
Is it at the rated voltage?
∗
Is there conductivity?
NO
Check the capacitor's
conductivity
Check the fan motor voltage.
(immediately after re-start)
Is it at the rated voltage?
∗
Check the fan motor voltage.
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
Replace the fan motor or control
PCB.
Replace the fan motor
Replace control PCB.
Replace the fan motor.
Replace the control PCB.
∗
Measure the voltage between
the red and black lead wires of
the fan motor, and check if the
maximum voltage reaches the
rated voltage.
Replace the capacitor.
(Replace the control PCB.)
Replace the fan motor.
(R3219)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Summary of Contents for FTKS20D3VMW
Page 11: ...Introduction SiENBE12 713 x...
Page 47: ...Specifications SiENBE12 713 36 Specifications...
Page 113: ...Control Specification SiENBE12 713 102 Function and Control...
Page 235: ...Instruction SiENBE12 713 224 System Configuration...
Page 297: ...Check SiENBE12 713 286 Service Diagnosis...
Page 316: ...SiENBE12 713 Outdoor Unit Removal Procedure 305 Step Procedure Points...