23
Model No: AC-W17CL
Version 1.0
Trouble shooting for A Single-Phase Asynchronous Motor
No.
Symptom
Cause
Remedy
1.
Failure of motor to start
after power on in spite of
normal supply voltage
1. Lead broken
2. Primary winding or
secondary winding broken
3. Contacts of starting switch
failing to be closed or poor
contact
4. Capacitor open-circuited
5. Bearing blocked
•
Bearing damaged
•
Bearing improperly
fitted
•
Setting of grease
•
Foreign matter
entrapped in the bearing
6. Rubbing between the stator
and the rotor
•
Bearing worn
•
Shaft bent
7. Overloaded
1. Locate the broken point with
a multi-meter and repair.
2. Determine the fault with a
multi-meter and replace the
winding.
3. Inspect the starting switch
and make adjustment.
4. Replace the capacitor.
5. Replace the bearing
•
Refit the bearing
•
Renew grease
•
Clean the bearing
6. File away the abnormally
projecting area of
lamination; Adjust the
concentricity.
7. Reduce the load or select a
motor with greater capacity
for proper matching.
2
Difficulty in starting in
spite of capability of
being started at no load
or with an external force
1. Secondary winding broken
or circuit discontinued
2. Poor contact of starting
switch
3. Capacitor open-circuited
1. Inspect and determine the
fault with a multi-meter.
Repair or replace the
winding.
2. Inspect and determine the
fault with a multi-meter.
Make adjustment.
3. Replace the capacitor.
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