Dometic Buttner MT LB50 - Page 20

20 4445103618
Display panel
Indicator LEDs on display panel
9DIP switches
battery
capacity and
functional
settings
Setting of the charging
current (see chapter
“Adapting the charging
current” on page 26) and
other functions
10 START+ Connection to positive
pole of 12 V starting
battery
11 COM– Connection to negative
pole of the house bat-
tery/chassis
12 BORD+ Connection to positive
pole of 12 V house battery
No in
fig. 3,
page 4
Designation
1 On/Off button
2Indicator LEDs
LED Status Description
Current
(red)
On Charging current present;
brightness indicates the
intensity of the charging
current
Batt. I
(yellow)
On House battery is charged
Flashing High temperature protec-
tion (> 50 °C)
Flashing
slowly
Only LiFePO4 batteries:
Low temperature protec-
tion (< 0 °C)
Item in
fig. 2,
page 3
Designation Description
Battery full
(green)
On House battery fully charged
(100 %); U2 phase
Flashing Charging process in
U1 phase (lead batteries:
> 75 %, LiFePO4 batteries:
>90%)
Flashing
slowly
State of charge 75 – 100 %
(lead batteries: < 75 %,
LiFePO4 batteries: < 90 %)
Main
Charging
(yellow)
On Charging process in
I/U1 phase
Flashing • Over voltage protection
of the house battery
(> 15.5 V)
• Only LiFePO4 batteries:
Temperature sensor is not
connected
Batt. II
(yellow)
On Starting battery charges the
house battery
Flashing Low voltage protection/
over voltage protection of
the starting battery
Flashing in
2s interval
Auxiliary charging terminal
for the starting battery acti-
vated
Power
(red)
On Voltage present; booster
charging activated
Flashing
slowly
Low voltage protection of
the starting battery
Flashing • Safety shutdown (chapter
“Troubleshooting” on
page 29)
• Internal device failure
(overheating)
LED Status Description