Care And Maintenance; Troubleshooting - Hilti SFC 22 A Operating Instructions Manual

2. Set the forward / reverse switch to the desired
direction of rotation.

7 Care and maintenance

en
WARNING
Repairs to the electrical section of the power tool may
be carried out only by trained electrical specialists.
7.1 Care of the power tool
CAUTION
Keep the power tool, especially its grip surfaces,
clean and free from oil and grease. Do not use clean-
ing agents which contain silicone.
Never operate the power tool when the ventilation slots
are blocked. Clean the ventilation slots carefully using
a dry brush. Do not permit foreign objects to enter the
interior of the power tool. Clean the outside of the power
tool at regular intervals with a slightly damp cloth. Do
not use a spray, steam pressure cleaning equipment or

8 Troubleshooting

Fault
The power tool doesn't run.
The power tool doesn't run and
1 LED blinks.
The on / off switch can't be
pressed, i.e. the switch is
locked.
The battery runs down more
quickly than usual.
The battery doesn't engage with
an audible double click.
LED 1 blinks.
18
6.7.3 Removing the bit / bit holder
1.
2.
3.
running water for cleaning. This may negatively affect the
electrical safety of the power tool.
7.2 Care of the Li‑ion battery
NOTE
Battery performance drops at low temperatures.
NOTE
Store the battery in a cool and dry place.
In order to achieve maximum battery life, stop using the
battery as soon as a significant drop in battery perform-
ance is noticed.
NOTE
- If use continues, further battery discharge will be
- Charge the batteries using the specified and approved
Possible cause
The battery is discharged or is not
pushed all the way in.
Electrical fault.
The battery is discharged.
The battery is too hot or too cold.
The forward / reverse switch is in the
middle position (transport lock en-
gaged).
Very low ambient temperature.
The retaining lugs on the battery are
dirty.
The battery is discharged.
The tool is overloaded (application
limits exceeded).
Remove the bit from the bit holder.
Open the keyless chuck.
Remove the bit adapter.
stopped automatically before the battery cells suffer
damage.
Hilti battery chargers for Li‑ion batteries.
Remedy
The battery must be heard to engage
with a double click or, respectively,
needs to be charged.
Remove the battery from the tool and
contact Hilti Service.
Change the battery and charge the
empty battery.
Bring the battery to the recommen-
ded working temperature.
Push the forward / reverse switch to
the left or right.
Allow the battery to warm up slowly
to room temperature.
Clean the retaining lugs and push the
battery in until it engages. Contact
Hilti Service if the problem persists.
Charge the battery.
Use the right power tool for the job
(don't use a low-powered tool for
heavy work).