13
Troubleshooting
Trouble Probable
Cause Remedy
Machine will not
start/restart or
repeatedly trips
circuit breakers or
blows fuses.
Machine not connected to
power source.
Verify machine is connected to power.
Fuse blown, or circuit
breaker tripped.
Replace fuse, or reset circuit breaker.
Cord damaged.
Replace cord.
Extension cord too light or
too long.
Use adequate size extension cord.
Building circuit breaker trips
or fuse blows.
Verify that sander is on a circuit of correct size. If
circuit size is correct, there is probably a loose
electrical lead.
Loose electrical
connections.
Go through all the electrical connections on the
edge sander 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.
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 220+/-20 and
second, checking the voltage between switch and
motor at 220+/-20. 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 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.
On/Off switch failure.
(or Forward/Reverse switch
on 3 phase model).
If the switch is suspect, you have two options:
Have a qualified electrician test the switch for
function, or purchase a new switch and establish if
that was the problem on changeout.
Disc won’t come
up to speed.
Extension cord too light or
too long.
Use adequate size extension cord.
Low (incoming) voltage.
Contact qualified electrician.
Excessive bite, or feed
pressure too great.
Allow sanding disc to cut freely, do not force.
Excessive
replacement of
sanding paper.
Too much pressure being
used during cuts.
Reduce pressure.
Not using full width of belt.
Stroke across the belt using full width.
Summary of Contents for DS20
Page 17: ...17 Exploded View DS20 Disc Sander ...
Page 19: ...19 Electrical Connections ...
