Troubleshooting Guide
Electrical Problems
6
6-3
50HD07doc072310
Troubleshooting Guide
6.2
Electrical Problems
WARNING!
Before performing service near moving parts
such as blades, pulleys, motors, belts and chains, first turn
the key switch to the OFF (#0) position and remove the key.
If the key is turned on and moving parts activated, serious
injury may result.
WARNING!
Disconnect and lockout power before perform-
ing any service to the electrical system. For battery-pow-
ered equipment, disconnect the negative battery terminal
cable. Failure to do so may result in injury and/or electrical
system damage.
PROBLEM
CAUSE
SOLUTION
Up/down Excessively Slow.
Up/down belt loose.
Adjust belt to be as loose as possible
without slipping.
Vertical wear pads too tight.
Adjust pads.
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 control panel
cover and clean contacts.
Bad key switch.
Replace key switch.
Circuit breaker.
Reset breaker in control box (
).
Burned-out motor.
Replace motor.
Bad connection on battery
post or loose wire.
Check for loose wire or terminal connec-
tions.
Power Feed Motor Does Not
Work.
Sawdust buildup in the power
feed pulleys.
Sawdust buildup puts mechanical bind
on power feed which causes automatic
motor protection circuit to activate.
Remove sawdust from pulleys and oper-
ate normally. If motor does not operate
after sawdust removal, reset circuit
breaker on the front of the control 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 lubri-
cate contacts 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.