Troubleshooting - Hilti TE 4-A22 Operating Instructions Manual

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

9 Troubleshooting

Fault
The power tool doesn't run.
The power tool doesn't run and
1 LED blinks.
The tool doesn't work and all 4
LEDs blink.
No hammering action.
The control switch can't be
pressed, i.e. the switch is
locked.
The drive spindle doesn't rotate.
8.5 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.
8.6 Checking the power tool after care and
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.
Possible cause
The battery is discharged or fitted
incorrectly.
Electrical fault.
The battery is too hot or too cold.
The battery is discharged.
The battery is too hot or too cold.
The power tool has been overloaded.
The overheating prevention cut-out
has been activated.
The power tool is too cold.
The function selector switch is set to
"Drilling without hammering".
The forward/reverse switch is set to
reverse rotation.
The forward / reverse switch is in the
middle position (transport lock en-
gaged).
The permissible operating temper-
ature of the power tool's electronics
has been exceeded.
The permissible battery operating
temperature has been exceeded.
The battery is discharged.
is possible to continue working with a battery in this
condition but it should be replaced in good time.
maintenance
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 Service.
Bring the battery to the recommen-
ded working temperature.
Change the battery and recharge the
discharged battery.
Bring the battery to the recommen-
ded working temperature.
Release the control switch and press
it again.
Allow the power tool to cool down.
Clean the ventilation slots.
Allow the power tool to warm up to
the minimum operating temperature.
See section: 7.2.1 Working at low
temperatures
Set the function selector switch to
"Hammer drilling".
Set the forward/reverse switch to for-
ward rotation.
Push the forward / reverse switch to
the left or right.
Allow the power tool to cool down.
Bring the battery to the recommen-
ded working temperature.
Change the battery and recharge the
discharged battery.
en
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