Always disconnect the battery from the power tool before performing any maintenance work.
Condition
Power tool shuts down during operation
AR 900
Cause
Battery or machine's electronics too
hot
Electrical or electromagnetic
malfunction
Malfunction in battery
(4 LEDs on battery flash red and a
rapid succession of beeps sound for
several seconds)
Remedy
Take the adapter out of the power tool; allow
the battery and power tool to cool down
Remove the adapter and refit it again
Disconnect battery from power tool, take it
off your back, observe battery and contact
your STIHL servicing dealer immediately.
If the battery emits fumes, heats up, smells,
makes noises or shows signs of deforma-
tion, disconnect it from the power tool, take
it off your back, put it down and immediately
move a safe distance away. Keep children
and animals away from the work area. Keep
battery away from combustible materials.
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