Troubleshooting - Hilti NPR 19-22 Manual

▶ Remove the battery/batteries.
▶ Never transport batteries loose and unprotected. During transport, batteries should be protected from
excessive shock and vibration and isolated from any conductive materials or other batteries that may
come in contact with the terminals and cause a short circuit. Comply with the locally applicable
regulations for transporting batteries.
▶ Do not send batteries through the mail. Consult your shipper for instructions on how to ship undamaged
batteries.
▶ Prior to each use and before and after prolonged transport, check the product and the batteries for
damage.
Storage
WARNING
Accidental damage caused by defective or leaking batteries !
▶ Always store your products with the batteries removed!
▶ Store the product and the batteries in a cool and dry place. Comply with the temperature limits stated in
the technical data.
▶ Do not store batteries on the charger. Always remove the battery from the charger when the charging
operation has completed.
▶ Never leave batteries in direct sunlight, on sources of heat, or behind glass.
▶ Store the product and batteries where they cannot be accessed by children or unauthorized persons.
▶ Prior to each use and before and after prolonged storage, check the product and the batteries for
damage.
9

Troubleshooting

If a problem occurs, always observe the status indicator of the battery. See the section headed Status
indicators of the Li­ion battery.
If the trouble you are experiencing is not listed in this table or you are unable to rectify the problem by
yourself, contact Hilti Service.
Trouble or fault
The battery runs down more
quickly than usual.
The battery does not engage
with an audible "click".
Red LED => flashes at long
intervals and a warning tone
is emitted.
Red LED => lights continu-
ously and a warning tone is
emitted.
Red LED => lights continu-
ously and no warning tone is
emitted.
Red LED => lights continu-
ously and a warning tone is
emitted.
Red LED => lights briefly and
no warning tone is emitted.
Red LED => flashes at short
intervals and a warning tone
is emitted.
LEDs of the battery show
nothing
*2321707*
Possible cause
Very low ambient temperature.
The retaining lugs on the battery
are dirty.
Pressing pressure not achieved
(tool was used incorrectly).
Technical problem.
Product maintenance necessary.
Technical problem.
Product overheated.
The state of charge of the battery
is too low to allow a complete op-
erating cycle.
Battery faulty.
2321707
Action to be taken
▶ Allow the battery to warm up
slowly to room temperature.
▶ Clean the retaining lugs and refit
the battery.
▶ Make sure that the tool is used
correctly and check the pressed
part if unsure.
▶ Contact Hilti Service.
▶ Contact Hilti Service.
▶ Contact Hilti Service.
▶ Allow the product to cool down.
▶ Change the battery and charge
the empty battery.
▶ Contact Hilti Service.
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