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Troubleshooting
SiEN12-710A
112
Service Diagnosis
4.4 Fan Motor or Related Abnormality
4.4.1 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.154
NO
NO
NO
Check No. 16
Check Hall IC
NO
NO
NO
YES
YES
YES
YES
YES
YES
(R7132)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Replace the fan motor or control
PCB.
Replace the fan motor.
Replace 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.
Replace the fan motor.
Replace the control PCB.
Does it rotate?
Is there an output?
Is it at the
rated voltage?
∗
Does it rotate
smoothly?
Is it at the rated
voltage?
∗
Is there conductivity?
Operate the fan.
Rotate the fan by hand.
Check the fan motor voltage.
Check the fan motor voltage.
(immediately after re-start)
Check the capacitor's conductivity
Summary of Contents for 2MKS40FV1B
Page 11: ...Introduction SiEN12 710A x ...
Page 12: ...SiEN12 710A List of Functions 1 Part 1 List of Functions 1 Cooling Only 2 2 Heat Pump 4 ...
Page 17: ...Heat Pump SiEN12 710A 6 List of Functions ...
Page 25: ...Heat Pump SiEN12 710A 14 Specifications ...
Page 111: ...Instruction SiEN12 710A 100 Operation Manual ...
Page 199: ...Wiring Diagrams SiEN12 710A 188 Appendix ...
Page 203: ...SiEN12 710A iv Index ...