Troubleshooting - Hilti SF 8H-A22 Operating Instructions Manual

8.3 Care of the Li-ion battery
Avoid entrance of moisture.
Charge the battery fully before using it for the first time.
In order to achieve maximum battery life, stop discharging the
battery as soon as a significant drop in performance is noticed.
NOTE
If use of the power tool continues, battery discharge is stopped
automatically (indicated by LED 1 blinking) before the battery cells
suffer damage.
Charge the battery with the Hilti charger approved for use with
Li-ion batteries.
NOTE
– A conditioning charge (as is required with NiCd or NiMH
batteries) is not necessary.
– Interruption of the charging procedure has no negative effect
on battery life.
– Charging can be started at any time with no negative effect
on battery life. There is no memory effect (as with NiCd or
NiMH batteries).
– For best results, batteries should be stored fully charged in a
cool dry place. Avoid charging the battery in places subject
to high ambient temperatures (e.g. at a window) as this has
an adverse effect on battery life and increases the rate of
self-discharge.
– 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.
8.4 Maintenance
WARNING
Repairs to the electrical section of the power tool may be
carried out only by trained electrical specialists.
Check all external parts of the power tool for damage at regular
intervals and check that all controls operate faultlessly. Do not
operate the power tool if parts are damaged or when the controls
do not function faultlessly. If necessary, the power tool should be
repaired by Hilti Service.
8.5 Checking the power tool after care and maintenance
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.

9 Troubleshooting

Fault
The power tool
doesn't run.
The tool doesn't
work and all 4
LEDs blink.
The power tool
doesn't run and 1
LED blinks.
Printed: 14.11.2013 | Doc-Nr: PUB / 5161651 / 000 / 00
Possible cause
The battery is dis-
charged or fitted in-
correctly.
Electrical fault.
The power tool has
been overloaded.
The overheating pre-
vention cut-out has
been activated.
The battery is dis-
charged.
The battery is too hot
or too cold.
Remedy
The battery must be
heard to engage with
a double click or,
respectively, needs
to be charged.
Remove the battery
from the power tool
and contact Hilti Ser-
vice.
Release the control
switch and press it
again.
Allow the power tool
to cool down.
Clean the ventilation
slots.
Change the battery
and recharge the
discharged battery.
Bring the battery to
the recommended
working temperature.
en
29