Troubleshooting - Hilti TE 2-A22 Original Operating Instructions

6.3 Care of the lithium­ion batteries
Note
Battery discharge is stopped automatically before the battery cells suffer damage.
A conditioning charge of the battery is not necessary.
Interruption of the charging operation has no negative effect on battery life.
Charging can be started at any time with no negative effect on battery life.
If the battery no longer reaches full charge, it may have lost capacity due to aging or overstressing. It
is possible to continue working with a battery in this condition but it should be replaced in good time.
▶ Charge batteries fully before using them for the first time.
▶ Do not allow moisture to enter the interior.
6.4 Transport and storage of batteries
WARNING
Risk of fire! Risk of short circuiting.
▶ To avoid short circuits and associated heat generation, lithium-ion batteries should never be stored
or transported in loose, bulk form and without protective measures.
▶ Pull the battery out of its locked position and into the first engagement position.
▶ Observe the nationally and internationally applicable transport regulations when shipping batteries by
road, rail, sea or air.
Note
Ideally, the battery should be stored in a fully-charged state in a dry place that is as cool as
possible. Storing the battery in places subject to high ambient temperatures (e.g. by a window)
has an adverse effect on battery life and increases the rate of self-discharge.

7 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.
7.1 The rotary hammer is not in working order
Trouble or fault
The rotary hammer doesn't
start.
The LEDs indicate nothing.
1 LED blinks.
4 LEDs blink.
8
Possible cause
The rotary hammer has been over-
loaded.
The battery is not fully inserted.
The battery is discharged.
The battery is too hot or too cold.
The battery is discharged.
The battery is too hot or too cold.
The rotary hammer has been over-
loaded briefly.
The overheating prevention cut-out
has been activated.
Action to be taken
▶ Switch off the rotary hammer,
remove the battery and do
not continue to use the rotary
hammer.
▶ Push the battery in until it
engages with a double click.
▶ Change the battery and charge
the empty battery.
▶ Bring the battery to the recom-
mended working temperature.
▶ Change the battery and charge
the empty battery.
▶ Bring the battery to the recom-
mended working temperature.
▶ Release the control switch and
then press it again.
▶ Allow the rotary hammer to cool
down and clean the air vents.