Dometic L-20 Guía Rápida página 10

EN
Charging status icon Description
Note In order to keep the battery from discharging, the display dims after 2 min. After 15 min, it will turn
off. To turn the display back on and resume normal use, tap on it.
General protection
The control unit protects the house battery against excessive discharging and overloads. However, it is recommend-
ed that the house battery voltage does not fall below 10.5 V and does not exceed 15 V. If the house battery voltage
falls below 11.5 V, charge the battery immediately.
Protection alarms (3L-100B, 3L-150-P only)
If the display shows the 0 V value for the house battery, it is probable that the internal battery management system
(BMS) intervened to avoid the excessive discharge.
The control unit will allow a deeper discharge than the internal battery management system (BMS) of the house bat-
tery:
Discharge current at 20 °C
100 A
125 A
150 A
175 A
200 A
Fig.  on page 2
When the battery is discharged the internal battery management system (BMS) triggers an alarm. There are two ways
to resolve the issue:
Connect an external battery charger.
Press the green icon inside the house battery icon
alternator shortly.
The control unit has an internal sensor that constantly monitors the ambient temperature. When the ambient temper-
ature is outside the 0 °C ... 45 °C range, the system triggers an alarm:
The alarm disappears when the ambient temperature returns to the normal range.
Charging
When charging the battery with an external charger, the following guidelines should be observed:
8
(Red) Alternator is charging the battery.
Maximum discharge time
3L-100B
55 min
25 min
5 min
2 min
30 s
. The control unit will connect the battery to the vehicle
3L-150-P
90 min
70 min
25 min
10 min
30 s
Fig.  on page 2