-31-
Model W1855 (For Machines Mfd. Since 6/17)
SE
RV
IC
E
Troubleshooting
Motor.and.Electrical
PROBLEM
POSSIBLE.CAUSE
CORRECTIVE.ACTION
Machine does not
start or a breaker
trips immediately
upon start-up.
1. Switch disabling key removed.
2. Incorrect power supply voltage.
3. Power supply circuit breaker tripped or fuse
blown.
4. Motor wires connected incorrectly.
5. Wiring open; has high resistance, or a short.
6. ON/OFF switch at fault.
7. Start capacitor at fault.
8. Motor at fault.
1. Install switch disabling key (
Page 17).
2. Ensure correct power supply voltage (
Page 9).
3. Ensure circuit is sized correctly. Reset circuit
breaker or replace fuse.
4. Correct motor wiring connections (
Page 34).
5. Check/fix broken, disconnected, or corroded wires.
6. Replace switch.
7. Test/replace.
8. Test/repair/replace.
Machine stalls or
is underpowered.
1. Sanding with too much pressure.
2. Machine undersized for task.
3. Workpiece material not suitable for machine.
4. Dust buildup or blockage of dust port.
5. Drive belt damaged and slipping.
6. Pulley/sprocket slipping on shaft.
7. Motor overheated.
1. Reduce pressure on workpiece while sanding.
2. Clean/replace sandpaper (
Pages 24 & 27); reduce
feed rate/sanding depth.
3. Only sand wood—ensure moisture is below 20%.
4. Clear blockages, seal leaks, use smooth-wall duct,
eliminate bends, close other branches.
5. Replace drive belt (
Page 30). Ensure belt is
properly tensioned.
6. Replace loose pulley/shaft.
7. Clean motor, let cool, and reduce workload.
Machine has
vibration or noisy
operation.
1. Machine incorrectly mounted to workbench.
2. Motor or other component loose.
3. Drive belt slapping cover/housing.
4. Sanding disc or drive roller out of balance,
damaged, or loose.
5. Motor bearings at fault.
1. Adjust feet, shim, or tighten mounting hardware.
2. Check for and tighten loose bolts, screws, nuts,
etc.
3. Properly tension drive belt.
4. Tighten, adjust, or replace affected component
(
Page 23).
5. Test by rotating shaft; rotational grinding noise or
loose shaft requires bearing replacement.
The following troubleshooting tables cover common problems that may occur with this machine. If you
need replacement parts or additional troubleshooting help, contact our Technical Support.
Note:
Before contacting Tech Support, find the machine serial number and manufacture date, and if
available, your original purchase receipt. This information is required to properly assist you.