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21 Troubleshooting Guide
21.1 Backpack Battery
Always disconnect the battery before carrying out any inspection, cleaning or maintenance.
Condition
LEDs and
Acoustic
Signals
Power tool does not
1 LED flashes
start when switched
green and six
on.
long beeps are
emitted.
1 LED glows
red.
4 LEDs flash
red and a rapid
succession of
short beeps is
emitted.
3 LEDs glow
red.
3 LEDs flash
red.
Power tool cuts out
1 LED glows
during operation.
red.
3 LEDs glow
red.
22
Cause
Remedy
Battery has low
► Charge the battery, @ 8.
charge.
Battery too hot / too
► Allow the battery to warm up or cool down gradually at
cold.
ambient temperatures of about 50 °F to 68 °F (10 °C to
20 °C).
Malfunction in
► Disconnect the battery from the power tool and reconnect it.
battery.
► Switch on the power tool.
► If the LEDs continue to flash, do not attempt to use the
battery.
The battery has a malfunction and must be replaced.
Power tool too hot.
► Allow the power tool to cool down.
Malfunction in power
► Disconnect the battery from the power tool and reconnect
tool.
the battery.
► Switch on the power tool.
► If the LEDs still flash, do not attempt to use the power tool.
The power tool has a malfunction and must be checked by
a servicing dealer.
Battery too hot / too
► Allow the power tool and battery to warm up/cool down
cold.
gradually at ambient temperatures of about 50 °F to 68 °F
(10 °C to 20 °C).
Power tool too hot.
No electrical contact
► Disconnect the battery from the power tool and reconnect it.
between power tool
► Switch on the power tool.
and battery.
► If the power tool still cuts out during operation, clean the
contact surfaces on the connecting cord, @ 19.2.
21 Troubleshooting Guide
0458-820-8621-A