14 English
8 789 929 560
LW20/30
BA
RR940503CR
Charging exhausted
batteries
In this mode, it is possible to charge
very cold batteries and batteries
which have an open-circuit voltage
of below 7.5 V or 15 V, i.e.
exhausted batteries.
Act with caution!
The overvoltage limit function
and the rated battery voltage
check are deactivated in this
mode.
Exhausted batteries must be
disconnected from the vehi-
cle supply system for char-
ging purposes.
Only one exhausted battery
must be charged in each
case.
1. Disconnect the battery from the
vehicle electrical system.
2. Set the voltage selector
switch (9) to the position
”0” (OFF).
3. Set the control knob (2) to the
left-hand limit position (mini-
mum charging current).
4. Connect the charging clips to
the battery with the correct pola-
rity:
– red clip to positive terminal
– black clip to negative terminal
Make sure that the charging
clips are attached securely.
Do not disconnect the char-
ging clips during charging.
5. While pressing the pushbut-
ton
set the voltage selector
switch to ”12 V” or ”24 V”.
The rated battery voltage and
selected charging voltage
must agree.
6. Set the charging current to the
value specified by the battery
manufacturer – insofar as possi-
ble – at the control knob (2).
Continuously monitor the
charging operation.
7. Correct the charging current at
the control knob (2) if necessary.
After the end of charging:
8. Set the voltage selector
switch (9) to ”0” (OFF).
9. Remove the charging clips from
the battery.
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