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9175415
Excessive
vibration or
noise.
12
1/2 HP Furnace Electric Motor
4. Starting windings
remain active in
circuit as motor
accelerates.
5. Worn or poorly
lubricated bearings.
6. Inadequate
ventilation reaching
the motor.
1. Excessive end play
in motor.
parts are touching. Check to see the
motor's shaft is straight.
a. Run the motor under normal load
and check the amount of current it is
drawing.
b. Disconnect the motor from its load
and check the current drawn while
running under no-load.
c. If the current draw is excessive
under load, but normal when there
is no-load, Inspect the load to
determine the problem.
d. If the no-load current is above the
listed rating, have the motor
serviced or replaced by a qualified
technician.
4. Switch motor off to listen for a click.
This is the centrifugal switch closing as
the motor slows.
5. Damaged or poorly lubricated bearing
can be heard. This may be a result of
wear, inadequate oil reaching the
bearings or the motor overheating.
Contact Princess Auto Ltd. for a
solution.
6. Clean/clear all ventilation openings. Use
dry compressed air if blowing debris
out of the ventilation openings.
1. An unbalanced motor or load creates
vibration. Check for excessive end play
or loose parts.
a. Realign the motor and load. Check
end play by trying to move the
motor shaft in and out. Add end-play
washers as required.
b. If the shaft is bent, replace the rotor
or motor.
For technical questions call 1-800-665-8685
V4.0
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