Dometic BUTTNER MT LB30 Instructions De Montage Et De Service page 22

• The charging booster starts charging the house
battery as soon as the value for "Increase of
charging power" is reached on the starting bat-
tery. The charging booster continuously
increases the charging power from 3 % of the
charging power until the required (maximum)
charging power is reached.
• If the voltage value falls below the "switch-off
threshold" value for 30 seconds, the charging
booster switches off automatically.
• If the voltage value falls below the value for
"Reduction of charging power" (e.g. due to
high loads), the charging booster reduces the
charging power to relieve the starter circuit. The
charging power is always at least 3 % of the pos-
sible charging power.
DIP
switch
Description
position
(gray)
Function selection for control via the
S1S2
charging voltage at the starting battery.
• Increase of charging power at
"START+" terminal > 13.6 V
• Reduction of charging power at
"START+" terminal < 13.2 V
• Switch-off threshold: 12.6 V (30 s)
Note: High voltage thresholds. Use only with sepa-
rately routed "Sense START" cable, sufficiently dimen-
sioned cable cross-sections and powerful alternator.
Connect "D+/ Kl. 15" to "Sense START" via a wire
jumper.
Function selection for control via D+ sig-
S1S2
nal of the alternator or the ignition lock
signal (terminal 15).
• Increase of charging power at
"START+" terminal > 13.2 V
• Reduction of charging power at
"START+" terminal < 12.8 V
• Switch-off threshold: 12.2 V (30 s)
Note: High voltage thresholds. Use only with sepa-
rately routed "Sense START" cable, sufficiently dimen-
sioned cable cross-sections and powerful alternator.
22
DIP
switch
position
(gray)
S1S2
Note: Lower voltage thresholds. A separately routed
"Sense START" cable is not required if the cable cross-
sections are sufficiently dimensioned. Connect "D+/
Kl. 15" to "Sense START" via a wire jumper.
S1S2
Note: Lower voltage thresholds. A separately routed
"Sense START" cable is not required if the cable cross-
sections are sufficiently dimensioned. Connect "D+/
Kl. 15" to "Sense START" via a wire jumper.
Adapting the charging current (only
MT LB 30)
➤Slide the DIP switch (fig. 1 2, page 3) to the
position shown in the table below to adapt the
charging current to the capacity of the house
battery.
DIP switch
position (gray)
4445103799
Description
Function selection for control via the D+
signal of the alternator or the ignition lock
signal (terminal 15).
• Increase of charging power at
"START+" terminal > 12.5 V
• Reduction of charging power at
"START+" terminal < 12.2 V
• Switch-off threshold: 12.0 V (30 s)
Function selection for control via the D+
signal of the alternator or the ignition lock
signal (terminal 15), suitable for vehicles
complying with Euro 6, 6+ standards
with highly fluctuating alternator and
starting battery voltages.
• Increase of charging power at
"START+" terminal > 11.7 V
• Reduction of charging power at
"START+" terminal < 11.4 V
• Switch-off threshold: 11.2 V (30 s)
Charging current
0 – 25 A (factory setting)
0 – 30 A