Powermatic DS20 operating instructions Troubleshooting

Troubleshooting

Trouble

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

Disc won’t come up to speed.

Excessive replacement of sanding paper.

Probable Cause	Remedy
Machine not connected to	Verify machine is connected to power.
power source.
Fuse blown, or circuit	Replace fuse, or reset circuit breaker.
breaker tripped.
Cord damaged.	Replace cord.
Extension cord too light or	Use adequate size extension cord.
too long.
Building circuit breaker trips	Verify that sander is on a circuit of correct size. If
	circuit size is correct, there is probably a loose
or fuse blows.
	electrical lead.
	Go through all the electrical connections on the
Loose electrical	edge sander including motor connections, verifying
	the tightness of each. Look for any signs of
connections.
	electrical arcing which is a sure indicator of loose
	connection or circuit overload.
	If you have access to a voltmeter, you can
	separate a switch failure from a motor failure by
	first, verifying incoming voltage at 220+/-20 and
Switch or motor failure (how	second, checking the voltage between switch and
	motor at 220+/-20. If incoming voltage is incorrect,
to distinguish).
	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.
	If electric motor is suspect, you have two options:
	Have a qualified electrician test the motor for
Motor failure.	function or remove the motor and take it to a
	qualified electric motor repair shop and have it
	tested.
On/Off switch failure.	If the switch is suspect, you have two options:
(or Forward/Reverse switch	Have a qualified electrician test the switch for
	function, or purchase a new switch and establish if
on 3 phase model).	that was the problem on changeout.
Extension cord too light or	Use adequate size extension cord.
too long.
Low (incoming) voltage.	Contact qualified electrician.
Excessive bite, or feed	Allow sanding disc to cut freely, do not force.
pressure too great.
Too much pressure being	Reduce pressure.
used during cuts.
Not using full width of belt.	Stroke across the belt using full width.

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