Powermatic 1285 operating instructions Mechanical and Electrical Problems

13.2Mechanical and Electrical Problems

Trouble

Machine will not start/restart or repeatedly trips circuit breaker or blows fuses.

Probable Cause	Remedy
No incoming power.	Verify unit is connected to power, and
	on-switch is pushed in completely.
	When jointer overloads on the circuit
	breaker built into the motor starter, it
	takes time for the machine to cool down
Overload automatic reset has not reset.	before restart. Allow unit to adequately
	cool before attempting restart. If
	problem persists, check amp setting on
	the motor starter inside the electrical
	enclosure.
	One cause of overloading trips which
	are 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,
Jointer frequently trips.	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.
	Check amp setting on motor starter.
	Verify that jointer is on a circuit of
Building circuit breaker trips or fuse	correct size. If circuit size is correct,
blows.	there is probably a loose electrical lead.
	Check amp setting on motor starter.
	If you have access to a voltmeter, you
	can separate a starter failure from a
	motor failure by first, verifying incoming
	voltage at 230+/-20 and second,
	checking the voltage between starter
Motor starter failure.	and motor at 230+/-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.
	Clean motor of dust or debris to allow
Motor overheated.	proper air circulation. Allow motor to
	cool down before restarting.
	If electric motor is suspect, you have
	two options: Have a qualified electrician
Motor failure.	test the motor for function or remove the
	motor and take it to a qualified electric
	motor repair shop and have it tested.
	Double check to confirm all electrical
	connections are correct and properly
	tight. The electrical connections other
	than the motor are pre-assembled and
Miswiring of the unit.	tested at the factory. Therefore, the
	motor connections should be double
	checked as the highest probability for
	error. If problems persist, double check
	the factory wiring.
	If the on/off switch is suspect, you have
	two options: Have a qualified electrician
On/off switch failure.	test the switch for function, or purchase
	a new on/off switch and establish if that
	was the problem on changeout.

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