LEESON Chassis Mount PWM Control: 175292.00 - Manual (Page 40)

34 Troubleshooting
Line fuse blows
Line fuse does not blow,
but the motor does not run
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.
1. Speed adjust pot or
reference voltage is set
to zero speed.
2. Speed adjust pot or
reference voltage
connections are open.
3. Drive is overloaded.
4. Drive is not receiving
DC line voltage.
1. Check that line fuses
are the correct size.
2. Check motor cable and
armature for shorts.
3. Add a blower to cool
the drive components;
decrease CUR LIMIT
settings, or resize motor
and drive for actual load
demand, or check for
incorrectly aligned
mechanical components
for “jams”. See page 25
for information on
adjusting the CUR LIMIT
trimpot.
1. Increase speed adjust
pot or reference voltage
setting.
2. Check that the speed
adjust pot or reference
voltage connections are
not open.
3. Verify that the motor is
not jammed. Increase
CURR LIMIT setting.
4. Apply DC line voltage
to +VDC and -VDC.
Symptom Possible
Causes
Suggested
Solutions