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Boost mode
If the battery voltage drops while power is being supplied externally because more power
is needed (e.g. because additional consumer loads are switched on), the device goes into
boost mode.
IMPORTANT! To maintain the battery voltage at a constant level, the charger can increase
the current in boost mode to the maximum charging current (see Technical Data).
To prevent the device overheating, the max. output current can be automatically limited if
the ambient temperature is high (power derating).
Stopping the ex-
ternal power sup-
ply and
disconnecting the
charging termi-
nals
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Connect (+) charging terminal to positive pole on battery
Connect (-) charging terminal to negative pole on the battery, or to vehicle body (e.g.
engine block) in the case of vehicle electrical systems
press start/stop button for approx. 5 secs
A query regarding correct polarity of the charging terminals is displayed:
Starting the external power supply confirms the correct polarity connection. If the ex-
ternal power supply is not started within 2.5 secs, the device reverts to menu mode.
Ensure charging terminals are connected to correct poles
Start external power supply by pressing the start/stop button
The charger starts the external power supply.
WARNING! Risk of explosion due to sparkinhg when disconnecting the charging
terminals.
Before disconnecting the charging terminals, stop external power supply by
pressing the start/stop button and possibly provide adequate ventilation.
Stop the external power supply by pressing the start/stop button
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