English
Fault
LEDs on the
battery
3 LEDs light
up red.
4 LEDs fla‐
shing red.
-
-
Hedge trimmer
3 LEDs light
cuts out during
up red.
operation.
-
Hedge trimmer's
-
running time is
too short.
-
Charging does
1 LED emits
not start when
red light.
the battery is
inserted into the
charger.
17.2
Troubleshooting the Charger
Fault
LED on Char‐
ger
Battery not being
The LED fla‐
charged.
shes red.
18 Specifications
18.1
STIHL HSA 50.0 Hedge Trim‐
mer
– Approved battery: STIHL AK
– Weight without battery: 2.9 kg
For runtime, see www.stihl.com/battery-life.
38
Cause
The cutting blades do
not run freely.
Hedge trimmer is too
hot.
There is a fault in the
battery.
No electrical contact
between the hedge
trimmer and battery.
Hedge trimmer or bat‐
tery is damp.
Hedge trimmer is too
hot.
There is an electrical
fault.
The battery is not fully
charged.
The battery life has
been exceeded.
The battery is too
warm or too cold.
Cause
No electrical contact
between charger and
battery.
There is a malfunction
in the charger.
18.2
– Tooth spacing: 30 mm
– Cutting length: 500 mm
– Sharpening angle: 35°
18.3
– Battery technology: Lithium-ion
Remedy
► Insert battery.
► Switch on the hedge trimmer.
► If 3 LEDs continue to flash red: Do not
use your hedge trimmer and contact your
STIHL servicing dealer for assistance.
► Spray both sides of cutting blades with
STIHL resin solvent.
► If 3 LEDs continue to flash red: Do not
use your hedge trimmer and contact your
STIHL servicing dealer for assistance.
► Remove the battery.
► Allow the hedge trimmer to cool down.
► Remove battery and reinsert it.
► Switch on the hedge trimmer.
► If 4 LEDs continue to flash red: Do not
use the battery; contact a STIHL authori‐
zed dealer.
► Remove the battery.
► Clean electrical contacts in the battery
compartment.
► Insert battery.
► Allow hedge trimmer or battery to dry.
► Remove the battery.
► Allow the hedge trimmer to cool down.
► Remove battery and reinsert it.
► Switch on the hedge trimmer.
► Fully charge the battery.
► Replace battery.
► Leave battery inserted in charger.
Charging starts automatically as soon as
the permitted temperature range is rea‐
ched.
Remedy
► Remove the battery.
► Clean contacts on charger.
► Insert battery.
► Do not use the charger and contact your
STIHL dealer for assistance.
Cutting blades
STIHL AK Battery
18 Specifications
0458-018-9801-A