Troubleshooting - Dometic BUTTNER MT LB50 Montage- Und Bedienungsanleitung

Troubleshooting

Fault
The charging booster does
not work. The red "Power"
LED does not light up.
The charging booster does
not work. The yellow
"Main Charging" LED
flashes.
The charging booster does
not work. All LEDs are flash-
ing simultaneously.
Unusually long charging
time. The yellow "Batt. I"
LED flashes.
Unusually long charging
time. The yellow "Batt. I"
LED flashes slowly.
Unusually long charging
time. The yellow "Batt. II"
LED flashes.
Unusually long charging
time. The yellow "Batt. II"
LED flashes. The red
"Power" LED flashes
slowly.
Possible cause
Insulation faults, breaks or loose connec-
tions at the live cables.
Short circuit has been generated.
Over voltage protection of the house bat-
tery. Battery voltages too high (> 15.5 V).
Connection of defective charging sys-
tems.
Only LiFePO4 batteries: Temperature sen-
sor is not connected.
Charging program is not set correctly for
the battery used.
High temperature protection of the house
battery: The charging booster switches to
reduced charging voltage (12.8 V) and the
maximum charging current is halved when
the temperature of the battery exceeds the
cutoff value (> 50 °C).
Only LiFePO4 batteries: Low temperature
protection of the house battery. The
charging booster switches to reduced
charging current when the temperature of
the battery drops below the cutoff value
(< 0 °C).
Over voltage protection of the starting
battery. Battery voltage too high
(> 16.5 V).
Low voltage protection of the starting bat-
tery. Battery voltage too low (> set value
for "increase of charging power", see
chapter "Setting the operating mode" on
page 27). The charging booster switches
to reduced charging current (<30 %) to
protect the battery.
4445103618
Suggested remedy
➤ Check live cables for insulation faults,
breaks or loose connections.
➤ If you cannot find an error, contact an
authorized service agent.
The device fuse must be replaced by an
authorized service agent after it has been
triggered by excess current.
➤ Reduce the connected voltages.
The AC/DC charger combination restarts
automatically when the voltage drops to
the restart value (< 13.2 V).
➤ Check and remove defective
charging systems if necessary.
➤ Connect the temperature sensor.
➤ Check the setting of the charging
program (see chapter "Setting the
charging program" on page 26).
➤ Check that the air inlets and outlets
are not covered or obstructed.
➤ Allow the battery to cool down.
The charging booster returns automati-
cally to full charging voltage and current
when the temperature drops to the
restart value (< 48 °C).
➤ Move the battery to a warmer loca-
tion (> 0 °C).
The charging booster restarts automati-
cally when the temperature exceeds the
restart value (> 0 °C).
The charging booster restarts returns
automatically to full charging current
when the voltage drops to the restart
value (< 16.5 V).
The charging booster restarts returns
automatically to full charging current
when the voltage rises to the restart value
(set value for "reduction of charging
power", see chapter "Setting the operat-
ing mode" on page 27).
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