USER MANUAL ~ DRYWALL SANDER MODEL No. BNR7231A
- Page 11-
• We recommend that you always clean the unit immediately after using it.
• Clean the unit regularly by rubbing it with a damp cloth and a little soft soap.
Do not use cleaners or solvents; these will attack the plastic parts in the unit.
You must also ensure that water cannot get into the inside of the
• unit.
Carbon brushes
• If excessive sparking occurs you must have the carbon brushes checked
by a qualified electrician.
• Attention! Only a qualified electrician is allowed to change the brushes.
9. CORRECTIVE ACTION IN CASE OF FAILURE
(1) The operating switch is switched on, but the motor is not working.
-- Wires in the mains plug or in the socket are loose.
Have socket and plug checked or repaired.
--The switch is faulty.
Have the switch replaced.
(2) The operating switch is switched on, but unusual noises can be heard, the
motor is not working or only very slowly.
-- Switch contact has failed.
Have the switch replaced.
-- Component jammed.
Have the electric tool checked or repaired.
--Too much thrust, as a result the motor is dragging.
Use less thrust during the task.
(3) Motor gets hot.
-- Foreign substances have got inside the motor.
Have the foreign substances removed.
--Lack of or contaminated lubrication grease.
Have lubricating grease applied or replaced.
-- Pressure too high
Use less thrust during the task
(4) Frequent or strong sparks on the commutator.
--Short circuit on the armature.
Have the armature replaced.
-- Carbon brushes worn out or jammed
Have the carbon brushes checked.
-- Rough running of the commutator.
Have the surface of the commutator cleaned or ground.
