Troubleshooting; Disposal - Hilti SF 144-A Mode D'emploi

- If the battery no longer reaches full charge, it may have
lost capacity due to aging or overstressing. It is possible
to continue working with a battery in this condition but it
should be replaced in good time.
8.4 Maintenance
en
WARNING
Repairs to the electrical section of the power tool may
be carried out only by trained electrical specialists.

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 click.
The power tool or the battery
gets 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.
10
Check all external parts of the power tool for damage
at regular intervals and check that all controls operate
faultlessly. Do not operate the power tool if parts are
damaged or when the controls do not function faultlessly.
If necessary, the power tool should be repaired by Hilti
Service.
8.5 Checking the power tool after care and
After carrying out care and maintenance work on the
power tool, check that all protective and safety devices
are fitted and that they function faultlessly.
Possible cause
The battery is discharged or fitted
incorrectly.
Electrical fault.
The torque and operating mode set-
ting ring are not set to the hammer
drilling symbol.
The forward / reverse switch is in the
middle position (transport lock en-
gaged).
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).
maintenance
Remedy
The battery must be heard to engage
with a 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 immedi-
ately, 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).