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Troubleshooting Guide
Electrical Problems
Troubleshooting Guide
HDSdoc041118
4-3
4
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
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
connections.
Up/down motor relay damaged.
Have a qualified electrician
replace the relay.
Up/down motor is damaged.
Have a qualified electrician
replace the up/down motor.
One phase lacks.
Check circuit breakers in the
connectors.
Motor thermal protector started
to work.
Let the motor cool and then
reset the thermal protector.
Speed switch circuit
overloaded.
Turn off the power and let the
motor cool. Turn the power
back on.
Power feed is overheated.
Turn off the power and let the
motor cool. Turn the power
back on.
Short circuit in speed switch
motor system.
Have a qualified electrician
remove the short circuit.
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 operate normally. If motor
does not operate after sawdust
removal, reset 70 amp circuit
breaker on the front of the
control box.