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Display panel
Indicator LEDs on display panel
8
Sense BORD
Input for sense cable to
measure and control the
charging voltage at the
house battery
9
Temp. Sensor
2 connections for tem-
perature sensor
Item in
Designation
1
On/Off button
2
Indicator LEDs
LED
Status
Description
Current
(red)
On
Charging current present;
brightness indicates the inten-
sity of the charging current
Off
Charging current < 0.2 A
Batt. I
(yellow)
On
House battery is charged
Flashing
• High temperature protec-
tion (> 50 °C)
• Only LiFePO4 batteries:
Low temperature protec-
tion (< –20 °C)
Flashing
slowly
Only LiFePO4 batteries: Low
temperature protection
(< 0 °C)
Off
House battery is discon-
nected from the charging
booster (safety switch)
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 %)
Off
Charging process in I phase
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
Off
Trickle charging (U2 phase)
Batt. II
(yellow)
Flashing
Low voltage protection of the
starting battery
Power
(red)
On
Voltage present; booster
charging activated
Flashing
• Safety shutdown (chapter
• Internal device failure
(overheating)
• Reversed polarity of the
house battery
LED
Status
Description
