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Troubleshooting Mechanical and Electrical Problems
Trouble Probable Cause Remedy
No incoming power.
Verify unit is connected to power, on-
button is pushed in completely, and
stop-button is disengaged. See page
24.
Building circuit breaker trips or fuse
blows.
Verify that jointer is on a circuit of
correct size. If circuit size is correct,
there is probably a loose electrical
lead. Check amp setting on motor
starter.
Switch or motor failure (how to
distinguish).
If you have access to a voltmeter, you
can separate a switch failure from a
motor failure by first, verifying
incoming voltage at 110/220+/-10%
and second, checking the voltage
between switch and motor at
110/220+/-10%. If incoming voltage is
incorrect, you have a power supply
problem. If voltage between switch
and motor is incorrect, you have a
switch problem. If voltage between
switch and motor is correct, you have
a motor problem.
Motor overheated.
Clean motor of dust or debris to allow
proper air circulation. Allow motor to
cool down before restarting.
Motor failure.
If electric motor is suspect, you have
two options: Have a qualified
electrician test the motor for function
or remove the motor and take it to a
qualified electric motor repair shop
and have it tested.
Machine will not
start/restart or
repeatedly trips
circuit breaker or
blows fuses.
Unit incorrectly wired.
Double check to confirm all electrical
connections are correct. Refer to the
Wiring Diagram section to make any
needed corrections.