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Symptom
Possible
Causes
Suggested
Solutions
1. Line fuses are the wrong
size.
2. Motor cable or armature
is shorted to ground.
3. Nuisance tripping caused
by a combination of
ambient conditions and
high-current spikes.
4. Field circuit is shorted.
1. Reference signal or
speed adjust pot is set to
zero speed.
2. Reference signal or
speed adjust potentiometer
connections are open.
1. Check that line fuses
are the proper size.
2. Check motor cable and
armature for shorts.
3. Add a blower to cool
the drive components;
decrease TORQUE
settings, or resize motor
and drive for actual load
demand, or check for
incorrectly aligned
mechanical components
or “jams”. See page 26
for information on
adjusting the TORQUE
trimpot.
4. Send in drive to
Minarik repair
department.
1. Increase reference
signal or speed adjust
potentiometer setting.
2. Check that the
reference signal or speed
adjust potentiometer
connections are not open.
Line fuse blows
Line fuse does not
blow, but the motor
does not run
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