TROUBLESHOOTING
SYMPTOM CAUSE
SOLUTION
Motor runs intermittently.
Loose wire.
Check all wire connections.
Broken or damaged cord.
Replace cord.
Bad handle switch.
Test continuity - replace.
Motor not running.
Loose wires.
Check all wire connections.
Broken or damaged cord.
Replace cord.
Bad handle switch.
Test continuity – replace.
Blown rectifier.
Replace rectifier.
Shorted armature.
Replace armature.
Motor slow speed only.
Worn carbon brushes.
Replace carbon brushes.
Shorted armature.
Replace armature.
Motor runs / pad does
Broken or loose belt.
Replace or tighten belt.
not turn.
Wall breaker blows.
Excessive load on circuit.
Check total load on circuit.
Pad / brush over loaded.
Change pad and/or procedures.
Under sized extension cord.
Replace / remove extension cord.
Improper use.
Consult distributor.
Machine wobbles
Warped / damaged pad
Replace pad driver / brush.
or bounces.
driver / brush.
Pad not centered.
Center pad.
Wheels
worn.
Replace
wheels.
Machine vibrates / buzzes.
Worn motor bearings.
Replace motor bearings.
Wheels loose on axle.
Shim wheels tight on axle or replace.
Handle Clamp slips
Clamp bolt out of adjustment
See Lock Lever Adjustment (page 5).
Authorized Repair Service
Repair service for this machine must be performed by an NSS authorized service center. Repairs performed by an
unauthorized company will void the machine warranty. If you require assistance finding an authorized service
center, contact NSS Enterprises.
https://harrissupplyind.com - To Order Parts Call 608-268-8080
