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Troubleshooting
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OO
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The sanding
drums will
not start.
The main power emergency stop button is
pushed in, or it is faulty.
The power supply is insufficient or the circuit
breaker or fuse is tripped.
A wire or plug is loose or broken.
The amperage dial is set too low.
The thermal protection circuit breaker is
tripped.
The main power magnetic switch is faulty.
Either the
OO
OO
NN
NN
or
OO
OO
FF
FF
FF
FF
switch is shorted open.
The drum-drive motor is faulty.
Twist and pull the main power emergency stop
button, or test and replace the switch.
NN
NN
EE
EE
VV
VV
EE
EE
RR
RR
attempt to repair safety switches, OO
OO
NN
NN
LL
LL
YY
YY
replace them with new ones.
1. Repair power supply.
2. Close circuit breaker / replace the fuse.
3. Reduce sanding load to 25 amps max.
1. Replace all bad wiring and plugs.
2. Tighten all loose connections.
Unplug the sander, open the main power
panel, and adjust the amperage dial on the
main power magnetic switch to 25 amps.
1. Unplug sander, open main power panel,
and push the reset button.
2. Reduce sanding load to 25 amps max.
Replace the main power magnetic switch.
Replace the push-button switch.
Replace or repair the drum-drive motor.
The feed
conveyor
will not
start, or it
operates
incorrectly.
The main power emergency stop button is
pulled out, or it is faulty.
The power supply is insufficient or the circuit
breaker or fuse is tripped.
A wire or plug is loose or broken.
The conveyor feed speed switch is faulty.
Either the
OO
OO
NN
NN
or
OO
OO
FF
FF
FF
FF
switch is shorted open.
The feed motor magnetic switch is faulty.
The feed motor brushes are worn.
The conveyor feed speed circuit board is
faulty.
The feed motor is faulty.
Twist and pull the main power emergency stop
button, or test and replace the switch.
NN
NN
EE
EE
VV
VV
EE
EE
RR
RR
attempt to repair safety switches, OO
OO
NN
NN
LL
LL
YY
YY
replace them with new.
1. Repair power supply.
2. Close circuit breaker / replace the fuse.
3. Reduce sanding load to 25 amps max.
1. Replace all bad wiring and plugs.
2. Tighten all loose connections.
Replace the conveyor feed speed switch.
Replace the push-button switch.
Replace the feed motor magnetic switch.
Replace both feed motor brushes.
Replace or repair the conveyor feed speed
circuit board.
Replace or repair the feed motor.
The drum
sander
wobbles or
vibrates.
The mobile base, stand, or platform is loose or
unstable.
The motor or other components are loose,
misaligned, or out of adjustment.
Make sure all fasteners are tight; the sander is
operating on a sturdy stand and flat floor.
Make sure all fasteners and sander parts are
tight or correctly adjusted.
Use this troubleshooting chart to correct potential W1678 Double Drum Sander problems.
OPERATIONS
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