Powermatic PM15 Operating Instructions And Parts Manual page 24

Trouble
Machine will not
start/restart or
repeatedly trips
circuit breaker or
blows fuses.
Probable Cause
Unit not plugged in.
Hood not in down position.
Interlock switch not activating.
Overload automatic re-set has not
engaged.
Planer frequently trips.
Building circuit breaker trips or fuse
blows.
Loose electrical connections.
Remedy
Verify unit is connected to power.
Place hood in down position to
engage interlock switch.
Check to determine if switch is
actuating by listening for the audible
click as hood is closed. If you don't
hear the click, the switch is out of
adjustment. First make certain the
hood hinge screws are tight and that
the switch is aligned to the hood
panel and tight. If you still don't get a
click, then adjust the interlock switch
position.
When planer overloads on the circuit
breaker built into the motor starter, it
takes time for the machine to cool
down before restart. Allow unit to
adequately cool before attempting
restart. If problem persists, check
amp setting on the motor starter
inside the electrical box.
One cause of overload trips which is
not electrical in nature is too heavy a
cut. The solution is to take a lighter
cut. If too deep a cut is not the
problem, then check the amp setting
on the overload relay. Match the full
load amps on the motor as noted on
the motor plate. If amp setting is
correct, there is probably a loose
electrical lead or a failed component.
See "Motor starter failure" below.
Verify that the planer is on a circuit of
correct size. If circuit size is correct,
there is probably a loose electrical
lead. Also check amp setting on
motor starter.
Go through all of the electrical
connections on the planer including
motor connections, verifying the
tightness of each. Look for any signs
of electrical arcing which is a sure
indicator of loose connection or circuit
overload.
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