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9. Troubleshooting
Fault Possible cause Remedy
The power tool
doesn’t run.
The battery is discharged or fitted
incorrectly.
Thebatteryneedstobechargedor,
respectively, it must be heard to engage
with a double click.
Electrical fault. Remove the battery from the power tool
and contact Hilti.
The battery is discharged/hot. Deep discharge prevention / the elec-
tronics switch off. Fit the battery into the
charger.
The on / off switch
can’t be pressed,
i.e. the switch is
locked.
Not a fault (safety function).
Press the switch-on interlock.
Running speed
suddenly drops
considerably.
The battery is discharged or excessive
working pressure is applied to the power
tool.
Change the battery and recharge the
discharged battery. Reduce the working
pressure applied to the power tool.
The battery runs
down more quickly
than usual.
Battery condition is not optimal.
Only NiCd batteries should be given a
conditioning charge. (Please refer to the
operating instructions for the charger.)
The power tool
doesn’t restart by
itself after the saw
blade has stalled.
The deep discharge prevention system
switches offafter theblade stallsa second
time.
Press the switch-on interlock and the
control switch again.
The battery doesn’t
engage with an
audible double
click.
The retaining lugson the battery aredirty.
Clean the retaining lugs and check that
the battery engages securely. Contact
Hilti Service if the problem persists.
The tool or the
battery become
very warm.
Electrical fault. Switch the power tool off immediately,
remove the battery and contact Hilti
Service.
The power tool has been overloaded
(application limits exceeded).
Use the right power tool for the job (don’t
use a low-powered tool for heavy work).
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.
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