19 Troubleshooting
Fault
LEDs on the
operating unit
All LEDs on the
operating unit flash.
Self-propulsion is
not working.
The lawn mower
Warning triangle
stops during
illuminates red.
operation.
0478-131-9938-B
LEDs on the
Cause
battery
Communication with
the operating unit has
been interrupted.
The lawn mower or
battery are damp.
The resistance at the
blade is too great.
There is a fault in the
self-propulsion
mechanism.
3 LEDs
The lawn mower is
illuminate red.
too warm.
The blade is blocked. ► Pull out the activation key.
Remedy
► Pull out the activation key.
► Remove the battery.
► Do not use the lawn mower and
consult a STIHL specialist dealer.
► Pull out the activation key.
► Remove the battery.
► Clean the lawn mower.
► Allow the lawn mower or battery to dry.
► Set a higher cutting height.
► Switch the lawn mower on in lower
grass.
► Remove the battery and fit it again.
► Engage self-propulsion.
► If the self-propulsion fault persists:
consult a STIHL specialist dealer.
► Pull out the activation key.
► Remove the battery.
► Allow the lawn mower to cool down.
► Clean the lawn mower.
► Do not switch the lawn mower on too
frequently within a short time.
► If working with self-propulsion
engaged: set a lower speed.
► If working with self-propulsion
disengaged: go forwards slower.
► Set a higher cutting height.
► Mow shorter grass.
► Remove the battery.
► Clean the lawn mower.
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