Troubleshooting - Dometic Buttner MTBCB10 Installation And Operating Manual

Troubleshooting

Fault
The battery control booster
does not work. The green
"Power" LED does not light
up.
The battery control booster
does not work. The yellow
"Main Charging" LED
flashes.
Unusually long charging
time. The yellow "Batt. I" LED
flashes.
Unusually long charging
time. The yellow "Batt. I" LED
flashes slowly.
24
Possible cause
Insulation faults, breaks or loose con-
nections at the live cables.
Short circuit has been generated.
Over voltage protection of the house
battery. Battery voltages too high
(> 15.5 V).
Over voltage protection of the starting
battery. Battery voltages too high
(> 16.5 V).
Connection of defective charging sys-
tems.
Only LiFePO4 batteries: Temperature
sensor is not connected.
High temperature protection: The bat-
tery control booster switches to
reduced charging voltage (12.8 V)
when the temperature of the battery
exceeds the cutoff value (>50 °C).
Low temperature protection (only for
LiFePO4 batteries): The battery control
booster switches to reduced charging
voltage (12.8 V) when the temperature
of the battery drops below the cutoff
value (< 20 °C).
Low temperature protection (only for
LiFePO4 batteries): The battery control
booster switches to reduced charging
current when the temperature of the
battery drops below the cutoff value
(< 0 °C).
4445103620
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
(< 12.75 V).
➤ Reset the device by removing the con-
trol signal at D+/ terminal 15. Switch
off the motor and disconnect the
device from the mains.
➤ Reduce the connected voltages.
The battery control booster restarts auto-
matically when the voltage drops to the
restart value (< 16.5 V).
➤ Check and remove defective
charging systems if necessary.
➤ Connect the temperature sensor.
➤ Check that the air inlets and outlets are
not covered or obstructed.
➤ Allow the battery to cool down.
The battery control booster returns auto-
matically to full charging voltage when the
temperature drops to the restart value
(<48 °C).
➤ Move the battery to a warmer loca-
tion.
The battery control booster returns auto-
matically to full charging voltage when the
temperature exceeds the restart value
(>18 °C).
➤ Move the battery to a warmer location
(>0 °C).
The battery control booster restarts auto-
matically when the temperature exceeds
the restart value (>0 °C).