LEESON FHP Series NEMA 4x Variable Speed Drive - Manual (Page 55)

46
1. Check that line
fuses are properly
sized for the motor
being used.
2. Check motor cable
and motor for
shorts.
3. Add a blower to
cool the drive
components;
increase TQ LIMIT
settings (page 34).
1. Increase the speed
adjust
potentiometer
setting or voltage
input signal.
2. Check connections
to input. Verify that
connections are not
open.
Internal line fuse blows
Internal line fuse does
not blow, but the motor
does not run
1. Line fuses are the
wrong size.
2. Motor or motor cable
is shorted to ground.
3. Nuisance tripping
caused by a
combination of
ambient conditions
and high-current
spikes (i.e. reversing).
1. Speed adjust
potentiometer or
voltage input signal is
set to zero speed.
2. Speed adjust
potentiometer or
voltage input signal is
not properly
connected to drive
input; connections are
open.
Problem Possible
Cause
Suggested
Solution