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TROUBLESHOOTING- MOTOR(continued)
TROUBLE PROBABLECAUSE
Motor fails to develop
full power. (Power
output of motor decreases
rapidly with decrease in
voltage at motor terminals.
For example, a reduction
of 10% in voltage causes
a reduction of 19% in
maximum power output of
which the motor is capable,
while a reduction of 20%
in voltage causesa
reduction of 36% in
maximum power output.)
Motor starts slowly
or fails to come up
to full speed.
Motor overheats.
Starting relay in
motor will not
operate.
Motor stalls
(resulting in blown
fuses or tripped
circuit breakers),
Frequent opening of
fusesor circuit
breakers.
1. Power line overloaded with
lights, appliances and
other motors.
2. Undersize wires or circuit
too long.
3. General overloading of
power company
facilities. (In some
sectionsof the
cOuntry, demand for
electrical power may
exceed the capacity
of existing generating
and distribution systems,)
4. Incorrect fuses or circuit
breaker in power line.
1. Low voltage will not
trip relay.
2. Windings burned out
or open.
3. Starting relay not
operating.
1. Motor overloaded.
2. Improper cooling. (Air
circulation restricted
through motor due to
sawdust, accumulating
inside of saw).
1. Burned relay contacts
(due to extended
hold-in periods caused
by low line voltage,etc.)
2. Saw not in upright
position.
3. Loose or broken
connections.
1, Starting relay not
operating.
2. Voltage too low to permit
motor to reach operating
speed.
3. Fuses or circuit breakers
do not have sufficient
capacity.
1. Motor overloaded.
2, Fusesor circuit breakers
do not have sufficient
capacity.
3. Starting relay not
operating (motor does
not reach normal speed).
REMEDY
1. Do not use other appliances or motors
when using the saw.
2. Increase wire sizes, or reduce length of wiring.
See "Motor Specifications and Electrical
Requirements" Section.
3. Request a voltage check from the power company.
4. Install correct fuses or circuit breakers.
1. Request a voltage check from the power company.
2. Have motor repaired or replaced.
3, Have relay replaced,
1. Feed work slower into blade.
2. Clean out sawdust to provide normal air
circulation through motor.
See "Maintenance and Lubrication" Section.
1. Have relay replaced and request a voltage check
from the power company.
2. Place saw in upright position,
3. Have wiring checked and repaired,
!. Have relay replaced.
2. Request a voltage check from the power company.
3. Install proper size fuses or circuit breakers.
1. Feed work slower into blade.
2. Install proper size fuses or circuit breakers.
3. Have relay replaced,
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