Power Fist 9175399 Manuel D'utilisation page 11

V4.0
Problem(s)
Fuse/circuit
breaker
overloads.
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1/4 HP Furnace Electric Motor
Possible Cause(s)
1. There is a blown fuse
or open circuit
breaker.
2. Motor starter overload
activated.
3. Power enters control
circuit but does not
reach the motor.
4. Low or no voltage
reaching motor.
5. Motor shaft does not
turn when power
applied.
Suggested Solution(s)
1. Test for voltage at the fuse or circuit
breaker. Also see if the voltage/amp
rating of the fuse or circuit breaker is
correct for the motor. It should
exceed the Motor's FLC by 25
percent.
2. The thermal protector will
automatically reset and the motor will
function normally again once it has
cooled. Test the starter before
starting motor again.
3. Begin by confirming all contacts are
clean and tight. Examine for obvious
damage.
a. Test each part of the circuit for
power until the problem area is
discovered.
b. Have a qualified service technician
repair or replace the circuit.
4. Check each motor terminal's voltage.
The voltage should be within 10% of
the voltage on the motor's
nameplate. Disconnect the load and
apply power to the motor. If the
motor operates normally, then the
issue is with the load attached to the
motor. Should the motor still not
work, have it serviced or replaced by
a qualified technician.
5. Disconnect the motor from the load
and test under no-load conditions. If
the shaft does not turn, the bearing is
immobilized. Have the motor
serviced or replaced by a qualified
technician.
9175399
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