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18 Troubleshooting
18.1 Troubleshooting Trimmer or Battery
18 Troubleshooting
Condition LEDs on Battery Cause Remedy
Trimmer does not
start when switched
on.
1 LED flashes
green
Battery has low charge ► Recharge the battery fully as described in the
instruction manual for the STIHL AL 101, 300, 500
chargers.
1 LED glows red. Battery too hot or too cold. ► Pull the connecting cable plug out of the socket.
► Allow battery to cool down / warm up.
3 LEDs flash red. There is a malfunction in
the trimmer.
► Pull connecting cable plug out of the socket and
then refit it.
► Switch on the trimmer.
► If 3 LEDs continue to flash red: Do not use your
trimmer and contact your STIHL servicing dealer.
3 LEDs glow red Trimmer is too hot. ► Pull the connecting cable plug out of the socket.
► Allow trimmer to cool down.
4 LEDs flash red There is a malfunction in
the battery.
► Pull connecting cable plug out of the socket and
then refit it.
► Switch on the trimmer.
► If 4 LEDs continue to flash red: Do not use the
battery and contact your STIHL servicing dealer.
No electrical contact
between trimmer and
battery.
► Pull connecting cable plug out of the socket and
then refit.
Trimmer or battery damp. ► Allow trimmer or battery to dry.
Trimmer cuts out
during operation.
3 LEDs glow red Trimmer is too hot. ► Pull the connecting cable plug out of the socket.
► Allow trimmer to cool down.
There is a electrical
malfunction.
► Pull connecting cable plug out of the socket and
contact your STIHL servicing dealer.
► Switch on the trimmer:
Trimmer runtime is
too short.
Battery not fully charged ► Recharge the battery fully as described in the
instruction manual for the STIHL AL 101, 300, 500
charger.
Normal battery life has
been exceeded.
► Replace the battery.