Troubleshooting - Hilti SF 2-A Operating Instructions Manual

– If the battery no longer reaches full charge, it may have lost capacity
due to aging or overstressing. It is still possible to work with this
battery. You should, however, soon replace the battery with a new one.
8.4 Maintenance
WARNING
Repairs to the electrical section of the power tool may be carried out
only by trained electrical specialists.
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 maintenance
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.

9 Troubleshooting

Fault
The power tool does-
n't run.
The on / off switch
can't be pressed, i.e.
the switch is locked.
The battery runs
down more quickly
than usual.
The battery does
not engage with an
audible click.
Printed: 24.03.2014 | Doc-Nr: PUB / 5174908 / 000 / 00
Possible cause
The battery is
discharged or fitted
incorrectly.
Electrical fault.
The forward / reverse
switch is in the middle
position (transport lock
engaged).
Battery condition is not
optimal.
The retaining lugs on the
battery are dirty.
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 con-
tact Hilti Service.
Push the forward / re-
verse switch to the left or
right.
Have battery condition
diagnosed by Hilti Ser-
vice or replace with a
new battery.
Clean the retaining lugs
and check that the bat-
tery engages securely.
Contact Hilti Service if
the problem persists.
en
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