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20 Troubleshooting
20.1 Remedying Lawn Mower or Battery Faults
20 Troubleshooting
Fault LEDs on the
battery
Cause Remedy
The lawn mower
does not start when
switched on.
1 LED flashes
green.
The battery charge state is
too low.
► Charge the battery.
1 LED illuminates
red.
The battery is too warm or
too cold.
► Pull out the activation key.
► Remove the battery.
► Allow the battery to cool down or warm up.
3 LEDs flash red. There is a fault in the lawn
mower.
► Pull out the activation key.
► Remove the battery.
► Clean the electric contacts in the battery
compartment.
► Fit the battery.
► Switch the lawn mower on.
► If 3 LEDs still flash red: do not use the lawn mower
and consult a STIHL specialist dealer.
3 LEDs illuminate
red.
The lawn mower is too
warm.
► Pull out the activation key.
► Remove the battery.
► Allow the lawn mower to cool down.
4 LEDs flash red. There is a fault in the
battery.
► Remove the battery and fit it again.
► Switch the lawn mower on.
► If 4 LEDs still flash red: do not use the battery and
consult a STIHL specialist dealer.
The electrical connection
between the lawn mower
and battery has been
interrupted.
► Pull out the activation key.
► Remove the battery.
► Clean the electric contacts in the battery
compartment.
► Insert the activation key.
► Fit the battery.
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