User's Manual

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12V battery
If a battery voltage of between 7.3 V and 10.5 V is measured, this indicates a critical
range as at the lower voltage end. It is not clear whether it is a fully charged 6 V battery
(which could have a voltage of 7.3 V) or a deep-discharged 12 V battery.
If you attempt to start charging by pressing the MODE key (7), the charger rst pauses
for 1.5 minutes, after which another control measurement is taken. During this time the
following is displayed:
Reactivation of deep-discharged 12 V batteries using pulse charging
If after 1.5 minutes, the measured voltage is between 7.5 V and 10.5 V the batte-
ry is identied as a 12 V battery and the charging process starts with a gentle pulse
charging in mode to reactivate the battery.
When pulse charging the voltage display ashes during the charging process.
Once the battery has reached a voltage of 10.5V, the charger switches to trickle
charging using the respective charging currents (depending on the selected 12 V
charging program) and the voltage display shows the voltage without ashing.
Depending on the battery connected or the prevailing ambient temperature you can
also use the Mode key (7) to change to or , even if the battery voltage is below
10.5 V:
The reactivation using pulse charging is the same for all 12 V programs.
If after the 1.5 minute pause the battery is still
within the critical range of 7.3 and 7.5 V, the battery
is defective and the charger switches to the stand-
by-mode for safety reasons.
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