Troubleshooting; Disposal - Hilti SF151-A Operating Instructions Manual

9. Troubleshooting

Fault
The power tool doesn't run.
No hammering action.
The on / off switch can't be
pressed, i.e. the switch is
locked.
Running speed suddenly
drops considerably.
The battery runs down more
quickly than usual.
The battery doesn't engage
with an audible double click.
The power tool or the battery
become very warm.

10. Disposal

CAUTION
Improper disposal of the equipment may have serious consequences: The burning of plastic components
generates toxic fumes which may present a health hazard. Batteries may explode if damaged or exposed to
very high temperatures, causing poisoning, burns, acid burns or environmental pollution. Careless disposal
may permit unauthorized and improper use of the equipment. This may result in serious personal injury, injury
to third parties and pollution of the environment.
CAUTION
Dispose of defective batteries without delay. Keep them out of reach of children. Do not attempt to open or
dismantle batteries and do not dispose of them by incineration.
CAUTION
Dispose of the batteries in accordance with national regulations or return them to Hilti.
Printed: 07.07.2013 | Doc-Nr: PUB / 5070659 / 000 / 00
Possible cause
The battery is discharged or fitted
incorrectly.
Electrical fault.
Check the position of the torque and
operating mode setting ring.
The forward / reverse switch is in
the middle position (transport lock
engaged).
The battery is discharged.
Battery condition is not optimal.
The retaining lugs on the battery are
dirty.
Electrical fault.
The power tool has been overloaded
(application limits exceeded).
Remedy
The battery must be heard to engage
with a double click or, respectively,
needs to be charged.
Remove the battery from the power
tool and contact Hilti Service.
Turn the torque and operating mode
setting ring to the hammer drilling
symbol.
Push the forward / reverse switch
to the left or right.
Change the battery and recharge the
discharged battery.
Have battery condition diagnosed
by Hilti Service or replace with a
new battery.
Clean the retaining lugs and check
that the battery engages securely.
Contact Hilti Service if the problem
persists.
Switch the power tool off imme-
diately, remove the battery and
contact Hilti Service.
Use the right power tool for the job
(don't use a low-powered tool for
heavy work).
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