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18 Troubleshooting
18.1 Troubleshooting Hedge Trimmer and Battery
18 Troubleshooting
Condition LEDs on Battery Cause Remedy
Hedge trimmer does 
not start when 
switched on.
1LED 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. ► Remove the battery.
► Allow battery to cool down / warm up.
3 LEDs flash red. There is a malfunction in 
the hedge trimmer.
► Remove the battery.
► Clean contacts in battery compartment.
► Fit the battery.
► Switch on the hedge trimmer.
► If 3 LEDs continue to flash red: Do not use the 
hedge trimmer and contact your STIHL dealer for 
assistance.
Cutting blades do not run 
freely.
► Spray both sides of blades with STIHL resin 
solvent.
► If 3 LEDs continue to flash red: Do not use the 
hedge trimmer and contact your STIHL dealer for 
assistance.
3 LEDs glow red. Hedge trimmer is too hot. ► Remove the battery.
► Allow the hedge trimmer to cool down.
4 LEDs flash red. There is a malfunction in 
the battery.
► Remove battery and insert it again.
► Switch on the hedge trimmer.
► If 4 LEDs continue to flash red: Do not use the 
battery and contact your STIHL dealer for 
assistance.
No electrical contact 
between hedge trimmer 
and battery.
► Remove the battery.
► Clean contacts in battery compartment.
► Fit the battery.
Hedge trimmer or battery 
damp.
► Allow hedge trimmer or battery to dry.
Hedge trimmer cuts 
out during operation.
3 LEDs glow red. Hedge trimmer is too hot. ► Remove the battery.
► Allow the hedge trimmer to cool down.