Minarik RG300 Series, User Manual

Page: 47 / 64

39
Troubleshooting
Problem
Field fuse blows
Line fuse blows
Possible
Causes
1. Field fuse is the
wrong size
2. Motor field is shorted
to ground
3. F1 is shorted to F2
4. Motor cable is
shorted to ground
5. Motor field leads are
reversed with motor
armature leads.
1. Line fuse is 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 (i.e.
reversing).
Suggested
Solutions
1. Verify that the fuse is
1.5 A.
2. Check if the motor field
is shorted to ground.
Replace motor if
necessary.
3. Check that F1 and F2
are not shorted together.
4. Check that the motor
cable is not shorted to
ground. Replace cable if
necessary.
5. Wire motor armature to
A1 and A2; wire motor
field to F1 and F2.
1. Check that the line
fuses are correct for the
motor size (page 22).
2. Check motor cable and
armature for shorts.
3. Add a blower to cool
the drive components;
decrease FWD TQ and
REV TQ settings, or
resize motor and drive for
actual load demand, or
check for incorrectly
aligned mechanical
components or “jams”.