7 - ELECTRIC SYSTEM213
Bulk (LED 1 on)
The battery is discharged only when the rst LED Bulk/ON (Quick charge/
ON) is lit. Now the battery charger provides full power and the battery volt-
age increases slowly. After having reached the 27.6 V level, the battery is
about 25% charged and the second LED turns on.
(LEDs 1 and 2 on)
The battery has been charged to 25%. The battery charger still provides the
maximum output current and voltage increases up to the level of absorption
voltage. Phase A can last up to 6 hours max.
Absorption (LEDs 1, 2 and 3 on)
The battery has been charged to 50%. The battery charger limits the charg-
ing voltage to a safe level and the charging current decreases slowly.
(LEDs 1 to 4 on)
The battery has been charged to 75%. The charging voltage is limited to the
absorption level, because the battery is nearly full. Current consumption will
continue decreasing.
Maintenance (LEDs 1 to 5 on)
When all the LEDs are lit, the battery is fully charged. The slow mainte-
nance/charging programme provides a output voltage, high enough to keep
the batteries with a 100% charge, but low enough to prevent that the batter-
ies suffer unnecessary constraints. The battery charger can now deliver full
power to the connected uses/loads.
CAUTION
Disconnect the shore power supply connections when the system is not
in use.
LEDs on Meaning
Normal operation: the green light of LED no. 6 turns on
1 Battery charger On
1+2 U output > 27.6V
1+2+3 U output = absorption (28.5V)
1+2+3+4 3 hours after the max. bulk time has started or I < re-
turn amp
1+2+3+4+5 6 hours after the max. bulk time has started or I < re-
turn amp. for 15 min or more
9 Recharging current equal to 0-5% of total current
9+10 Recharging current equal to 5-25% of total current
9+10+11 Recharging current equal to 25-50% of total current
9+10+11+12 Recharging current equal to 50-75% of total current
9+10+11+12+13 Recharging current equal to 75-100% of total current
6 Green: normal operation, red: faulty, OFF: stand-by or
off
7 Green: communication of MasterBus in progress,
OFF: no communication of MasterBus
Failure condition: the red light of LED no. 6 turns on
6 red +1 Battery detection error
6 red +2 Too high temperature of the battery charger
6 red +3 Short-circuit warning: the battery charger will reduce
charging current to 25%
6 red +4 CC error: CC voltage is too low or too high
6 red +5 Temperature detection error
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