20 Troubleshooting
Fault
LEDs on the ope‐
rating unit
The lawn
AUTO-BOOST
mower loses
mode indicator
power in
flashes green.
AUTO-
BOOST
mode.
The lawn
1 LED on the
mower does
charge state indi‐
not start when
cator flashes
switched on.
green.
1 LED on the
charge state indi‐
cator illuminates
red.
Fault indicator fla‐
shes red.
Overheating indi‐
cator lights up
red.
3 LEDs on the
charge state indi‐
cator illuminate
red.
All LEDs on the
operating unit
flash.
0478-131-9676-A
LEDs on the
Cause
battery
The batteries are
too warm.
1 LED fla‐
The battery
shes green.
charge state is
too low.
1 LED illumi‐
The battery is too
nates red.
warm or too cold.
3 LEDs flash
There is a fault in
red.
the lawn mower.
3 LEDs illu‐
The lawn mower
minate red.
is too warm.
4 LEDs flash
There is a fault in
red.
the battery.
The electrical
connection bet‐
ween the lawn
mower and a bat‐
tery has been
interrupted.
Communication
with the operating
unit has been
interrupted.
The lawn mower
or one of the bat‐
teries is damp.
The resistance at
the blades is too
great.
The area around
the blade is
blocked.
Remedy
► The lawn mower automatically
switches to Standard mode.
Charge the battery.
► Remove the battery.
► Allow the battery to cool down
or warm up.
► Remove the batteries.
► Clean the electrical contacts in
battery compartment 1 and
battery compartment 2.
► Fit the batteries.
► Switch the lawn mower on.
► If 3 LEDs still flash red: do not
use the lawn mower and con‐
sult a STIHL specialist dealer.
► Remove the batteries.
► Allow the lawn mower to cool
down.
► 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.
► Remove the batteries.
► Clean the electrical contacts in
battery compartment 1 and
battery compartment 2.
► Fit the batteries.
► Remove the batteries.
► do not use the lawn mower
and consult a STIHL specialist
dealer.
► Remove the batteries.
► Clean the lawn mower.
► Allow the lawn mower or batte‐
ries to dry,
21.5.
► If working with self-propulsion
engaged: disengage self-pro‐
pulsion.
► If working with self-propulsion
disengaged: go forwards slo‐
wer.
► Set a higher cutting height.
► Switch the lawn mower on in
lower grass.
Clean the lawn mower.
English
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