Minarik PCM21000A, User Manual

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37 Troubleshooting
Motor does not run
1. Check that the motor is receiving AC power. Check fuses
and circuit breakers. Verify that the main power switch is on.
Check whether the speed adjust pot is turned fully CCW
(MANUAL mode) or the input signal is at zero.
2. The speed adjust pot may be open or the signal input leads
may be open.
3. Check whether the motor or its load is mechanically
jammed. Remove the cause of the jam. NOTE: If an
application requires more torque than is allowed by the
TORQUE trimpot setting, the control will go to current limit
under maximum loading conditions. Assuming that the
motor is properly sized, it then will be necessary to reset
TORQUE slightly CW until the stalled condition is
removed.
Fuses or circuit breakers blow
1. Check all wiring for shorts, grounds, and misconnections to
the control and motor.
2. Check that the motor ratings are within the ratings of the
control.
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