Troubleshooting Guide
Electrical Problems
4
4-3 HDSdoc091108 Troubleshooting Guide
4.2 Electrical Problems
PROBLEM CAUSE SOLUTION
Up/down Excessively Slow. Vertical wear pads too tight. Adjust pads.
Up/down belt loose. Adjust belt to be as loose as
possible without slipping
Worn up/down motor or motor
brushes.
Replace up/down motor or
motor brushes.
Up/down Or Power Feed
Motors Do Not Work.
Worn/dirty contacts in drum
switch.
Replace switch or remove con-
trol panel cover and clean con-
tacts.
Bad key switch. Replace key switch.
Circuit breaker. Reset breaker in control box
(See Section 4.10
).
Burned-out motor. Replace motor.
Bad connection on battery
post or loose wire.
Check for loose wire or termi-
nal connections.
Power Feed Motor Does Not
Work.
Sawdust buildup in the power
feed pulleys.
Sawdust buildup puts mechan-
ical bind on power feed which
causes automatic motor pro-
tection circuit to activate.
Remove sawdust from pulleys
and operate normally. If motor
does not operate after sawdust
removal, reset 70 amp circuit
breaker on the front of the con-
trol box.
Up/Down Or Power Feed
Switches Remain Engaged
When Switch Is Released.
Worn or dirty contacts in drum
switch.
Manually move the power feed
or up/down switch back to
neutral or "off" position.
Replace drum switch or
remove control panel cover
and clean and lubricate con-
tacts NOTE: Use only contact
grease supplied by
Wood-Mizer.
Drum switch spring broken. Manually move the power feed
or up/down switch back to
neutral or "off" position.
Replace drum switch spring.
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