![background image](http://html.mh-extra.com/html/daikin/3mks50dvm/3mks50dvm_service-manual_501112227.webp)
Troubleshooting
Si12-619A
214
Service Diagnosis
5.5
Fan Motor or Related Abnormality
5.5.1
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 control PCB.
Troubleshooting
Check No.16
Refer to P.269
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 3MKS50DVM
Page 13: ...Introduction Si12 619A xii ...
Page 131: ...Control Specification Si12 619A 118 Function and Control ...
Page 213: ...Instruction Si12 619A 200 Operation Manual ...
Page 283: ...Check Si12 619A 270 Service Diagnosis ...
Page 302: ...Si12 619A Outdoor Unit E Series 50 52 58 Class Removal Procedure 289 Step Procedure Points ...
Page 385: ...Wiring Diagrams Si12 619A 372 Appendix FTK X S50 60 71FVLT ...
Page 399: ...Si12 619A vi Index ...