Care And Maintenance; Troubleshooting - Hilti AG 125-A22 Mode D'emploi

1. Push the safety lock (switch-on interlock) forward to
unlock the on / off switch and then press the switch
fully.

8 Care and maintenance

WARNING
Repairs to the electrical section of the power tool may
be carried out only by trained electrical specialists.
CAUTION
Before beginning cleaning, remove the battery in or-
der to prevent the electric tool starting unintentionally.
8.1 Care of the power tool
DANGER
Under extreme conditions, when used for working on
metal, conductive dust may accumulate inside the tool.
This may have an adverse effect on the tool's protective
insulation. In this case, use of a stationary dust extrac-
tion system and frequent cleaning of the ventilation
slots are recommended.
Never operate the power tool when the air vents are
blocked. Regularly clean the power tool's air vents care-
fully with a dry brush. Do not permit foreign objects to
enter the interior of the tool. The motor's fan will draw
dust into the casing and an excessive accumulation of
conductive dust (e.g. metal, carbon fiber) may cause
electrical hazards. 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 running
water for cleaning. This may negatively affect the elec-
trical safety of the tool. Always keep the grip surfaces

9 Troubleshooting

Fault
The battery runs down more
quickly than usual.
The battery doesn't engage with
an audible click.
LED 1 blinks.
The power tool doesn't run and
1 LED blinks.
The tool doesn't work and all 4
LEDs blink.
2.
of the tool free from oil and grease. Do not use cleaning
agents which contain silicone.
NOTE
Frequent work on conductive materials (e.g. metal, car-
bon fiber) may make shorter maintenance intervals ne-
cessary. Take your individual work place risk assessment
into account.
8.2 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
8.3 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
Very low ambient temperature.
The retaining lugs on the battery are
dirty.
The battery is discharged.
The tool is overloaded (application
limits exceeded).
The battery is discharged.
The battery is too hot or too cold.
The power tool has been overloaded
briefly.
The safety lock (switch-on interlock) returns auto-
matically to the locked position when the on / off
switch is released.
stopped automatically before the battery cells suffer
damage.
Hilti battery chargers for Li‑ion batteries.
maintenance
Remedy
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).
Change the battery and charge the
empty battery.
Bring the battery to the recommen-
ded working temperature.
Release the switch and press it again.
en
25