Troubleshooting - Hilti ST 1800-A22 Manual De Instrucciones

9 Troubleshooting

Fault
The power tool doesn't run.
en
The power tool switches itself
off and all 4 LEDs on the battery
blink.
The power tool doesn't run and
1 LED blinks.
The control switch can't be
pressed, i.e. the switch is
locked.
The screw cannot be driven, al-
though the drive spindle rotates.
Running speed suddenly drops
considerably.
Speed cannot be controlled by
the switch, it simply switches on
/ off.
The battery doesn't engage with
an audible double click.
The power tool or the battery
gets very warm.
The screw is pressed too tightly
against the surface.
The screw is not pressed tightly
enough against the surface.
The battery becomes too hot to
touch.
24
Possible cause
The battery is discharged or fitted
incorrectly.
Electrical fault.
The overload cut-out has been activ-
ated.
The battery is discharged.
The battery is too hot or too cold.
The forward / reverse switch is in the
middle position (safety lock engaged).
The forward / reverse switch is set to
the wrong direction of rotation.
An incorrect or worn bit / bit holder /
setter is used.
The battery is discharged.
The control switch is defective.
The retaining lugs on the battery are
dirty.
Electrical fault.
The tool has been overloaded.
The depth gauge is set incorrectly.
The depth gauge is set incorrectly.
The battery cells are defective.
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.
Release the control switch, reduce
the load on the power tool and then
press the switch again.
Change the battery and recharge the
discharged battery.
Bring the battery to the recommen-
ded working temperature.
Push the forward / reverse switch to
the left or right.
Set the forward / reverse switch to the
correct direction of rotation.
Check that the correct bit / bit holder
/ setter is used or fit a new one.
Change the battery and recharge the
discharged battery.
Contact Hilti Service.
Clean the retaining lugs and check
that the battery engages securely.
Contact Hilti Service if the problem
persists.
Switch the power tool off immedi-
ately, remove the battery and contact
Hilti Service.
Allow the power tool to cool down.
Turn the depth gauge to the right.
Turn the depth gauge to the left.
Place the tool in non-flammable sur-
roundings (at least 3 meters away
from flammable materials) where it
can be kept under observation and
allow it to cool down. If necessary,
extinguish flames with cold water or
allow it to burn under supervision.
Contact Hilti Service.