► Sharpen each cutting edge of the upper cut‐
ting blade with a sharpening file. Always file
toward the cutting edge with a forward motion
matching the sharpening angle, 23.2.
Sharpen on the forward stroke. Lift off the
blade on the backstroke.
► Only sharpen the cutting edges. Do not file
blunt projecting parts of the cutting attach‐
ment, or the cutting blade guard. Make sure
your sharpening stroke matches the sharpen‐
ing angle,
23.2.
► Turn the hedge trimmer over and sharpen the
cutting edges of the lower cutting blade.
► Use a whetstone to remove any burrs from the
cutting edges. Remove as little material as
possible.
► After sharpening, wipe away filing or grinding
dust with a dry or slightly dampened cloth and
then spray the cutting blades with a resin sol‐
vent, such as STIHL Resin Remover and
Lubricant.
NOTICE
■ Operating the machine with dull or damaged
cutting blades may overload the motor. Keep‐
ing the cutting blades sharp helps maintain
cutting performance and the expected life of
the product.
22 Troubleshooting Guide
22.1 Hedge Trimmer and Battery
Always remove the battery before carrying out any inspection, cleaning or maintenance.
Condition LEDs on
Battery
Cause Remedy
Hedge trimmer
does not start
when switched
on.
No electrical
contact between
hedge trimmer
and battery.
►
Remove the battery, 13.2.
► Visually check the electrical contacts in the bat‐
tery compartment and on the battery.
►
Reinsert the battery, 13.1.
1 LED
flashes
green.
STIHL AR
Series: four
long beeps
are emitted
(AR L - six
beeps).
Battery has low
charge.
►
Charge the battery, 10.
1 LED glows
red.
Battery too hot /
too cold.
► Allow the battery to warm up or cool down grad‐
ually at ambient temperatures of about 50 °F to
68 °F (10 °C to 20 °C).
4 LEDs flash
red.
STIHL
AR Series:
Additionally,
a rapid suc‐
cession of
short beeps
is emitted.
Malfunction in
battery.
►
Remove the battery and reinsert it, 13.
►
Switch on the hedge trimmer, 14.1.
► If the LEDs continue to flash, do not attempt to
use.
The battery has a malfunction and must be
replaced.
3 LEDs glow
red.
Hedge trimmer
too hot.
► Allow the hedge trimmer to cool down.
3 LEDs flash
red.
Malfunction in
hedge trimmer.
►
Remove the battery and reinsert it, 13
►
Switch on the hedge trimmer, 14.1.
English 22 Troubleshooting Guide
24 0458-020-8601-A
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