16
Trouble Shooting (continued)
PROBLEM
POSSIBLE CAUSE
REMEDY
Machine will not run in
forward or reverse.
(continued)
5)
Control transformer
fuse blown.
6)
Stop button stuck “in”.
7)
Loose wire in panel.
8)
Defective contact block
on stop button.
Remove fuse and check for
continuity. If bad,
replace.
Check buttons.
Check terminal strip for
disconnected or loose
wires. Reconnect and
tighten loose wires to
proper location on strip.
Check block for continuity.
If bad, replace.
Motor hums or buzzes, but
will not turn in either
forward or reverse.
One leg of the 3 phase
power is dead (single
phasing).
Contacts burned in
contactor and not making
a connection on one leg.
Defective motor.
Remove each fuse. Check
for continuity in the power
supply and disconnect.
Consult factory for
replacement contactor.
Consult factory for
replacement motor.
Overload tripping.
Low voltage.
Current relay set too high.
Check voltage.
Consult factory.
