29
Emergency Situations (for the user)
Faults
Causes
Solutions
FAULTS
CAUSES
SOLUTIONS
The drum doesn’t come off
enough from the floor
Wheels joint, between the two parts of the
drum lifting rod, not properly adjusted
Adjust it
The abrasive doesn’t sand
enough or its speed is not
enough or it doesn’t keep the
right place
Unsuitable or worn-out abrasive
Replace the abrasive
Insufficient drum pressure
Adjust the drum pressure at the maximum level
Dust prevents adjusting the drum pressure
Remove the dust
Belt tension at a wrong value
Set it at a right value
Worn-out driving belt or pulleys or bearings
Replace the driving belt or contact an authorized Bona
dealer for pulleys and bearings replacement
The floor surface is not regu-
larly sanded
Faulty abrasive
Replace the abrasive
Incorrect wheel adjustment
Correct the wheel position
Bearings, pulleys or shafts dirty or faulty
Clean them or contact an authorized Bona dealer for re-
placement
Driving belt and wheels dirty, badly adjusted
or faulty
Clean, adjust or replace them.
Drum surface dirty or faulty
Clean, correct or replace the rubber-coated drum
Drum surface out of roundness
Replace the rubber-coated drum and remember never to
let the drum laying on the floor while the machine is not
working in order to avoid ovality
Scorching on work surface
Worn-out abrasive
Replace the abrasive
Excessive pressure on drum
Decrease sanding pressure
Insufficient dust collection
Dust bag more than 1/3 full
Replace it
Filter cloth guard dirty
Shake out the dirt and wash or change the filter guard
Vacuum ducts and/or obstructed pipes
Clean air ducts
