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Troubleshooting – Mechanical and Electrical Problems
Trouble Probable Cause Remedy
Machine will not
start/restart or
repeatedly trips
circuit breaker or
blows fuses.
No incoming power.
Verify unit is connected to power, on-button is
pushed in completely, and stop-button is
disengaged.
Overload automatic reset has
not reset.
When jointer 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
enclosure – it should match the amps on the
motor as indicated on the motor plate.
Jointer frequently trips.
One cause of overloading trips which are not
electrical in nature is too deep of 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 then
there is probably a loose electrical lead.
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. Also check amp setting
on motor starter.
Switch or motor failure (how
to distinguish).
Examine motor starter for burned or failed
components. If damage is found, replace
starter. If no visible damage found, have
starter tested.
If you have access to a voltmeter, you can
separate a starter failure from a motor failure
by first, verifying incoming voltage at 220+/-20
and second, checking the voltage between
starter and motor at 220+/-20. If incoming
voltage is incorrect, you have a power supply
problem. If voltage between starter and motor
is incorrect, you have a starter problem. If
voltage between starter 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, have it tested by
qualified service personnel. Repair or replace
as needed.
Electrical leads are attached
incorrectly.
Double check to confirm all electrical
connections are correct. Refer to appropriate
wiring diagrams posted on the machine and
at the back of this manual, to make any
needed corrections.