Hilti NPU 100 IP-A22, Original Operating Instructions

Page: 13 / 48

*2321734*
2321734 English 9
▶ 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.
8 Troubleshooting
If the trouble you are experiencing is not listed in this table or you are unable to remedy the problem by
yourself, please contact
Hilti Service.
8.1 The punching tool is not in working order.
Malfunction Possible cause Action to be taken
The LEDs on the battery indi-
cate nothing. The battery is not correctly in-
serted. ▶ Push the battery in until it
engages with a double click.
Battery is discharged. ▶ Change the battery and charge
the empty battery.
The battery is too hot or too cold. ▶ Allow the battery to cool
down or to warm up to room
temperature.
1 LED on the battery blinks. Battery is discharged. ▶ Change the battery and charge
the empty battery.
The battery is too hot or too cold. ▶ Allow the battery to cool
down or to warm up to room
temperature.
4 LEDs on the battery blink. Product momentarily overloaded. ▶ Allow the product to cool down.
Red LED => lights continu-
ously and a warning tone is
emitted. Technical problem.
▶
Incorrect operation is possible!
Contact
Hilti Service.
Red LED => blinks at short
intervals and a warning tone
is emitted. The state of charge of the battery
is too low to allow a complete op-
erating cycle. ▶ Change the battery and charge
the empty battery.
Red LED => lights briefly and
no warning tone is emitted. Product overheated. ▶ Allow the product to cool down.
8.2 The punching tool is in working order.
Trouble or fault Possible cause Action to be taken
The battery runs down more
quickly than usual. Very low ambient temperature. ▶ Allow the battery to warm up
slowly to room temperature.
The battery does not engage
with an audible double click. The retaining lugs on the battery
are dirty. ▶ Clean the retaining lugs and refit
the battery.
Red LED => lights continu-
ously and a warning tone is
emitted. Technical problem. ▶ Incorrect operation is possible!
Contact
Hilti Service.