Electrical system
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2999828 - 05/18 - EHG-0012-00EN
8
Battery voltage
(values during
operation)
Mobile operation
(vehicle moving,
no mains connec-
tion)
Battery operation
(vehicle station-
ary, no mains con-
nection)
Power operation
(vehicle station-
ary, mains con-
nection)
12.3 V to 13.5 V
(red, yellow, and
green LED are
lit)
12 V power supply
overload
1)
Normal range 12 V power supply
overload
1)
The battery is not
charged by the al-
ternator
1)
The battery is not
charged by the
transformer/rectifier,
the transformer/rec-
tifier is defective
1)
13.5 V (all LEDs
are lit)
Battery being
charged
Occurs only briefly
after charging
Battery being
charged
1)
If the voltage does not exceed this range for several hours.
Measuring the off-load voltage is a simple method to check the condition of
the battery. The off-load voltage is the voltage of the battery in idle condition,
when current is neither supplied nor consumed.
The following table helps to correctly interpret the displayed battery off-load
voltage. The specified values are guide values for dryfill batteries.
LT 100 indicator Off-load voltage values Battery charge
Red LED flashes 11.6 V or less Battery is fully discharged
Red and yellow LED are lit 11.6 V to 12.0 V Battery is discharged to
totally discharged
Red and yellow LED are lit 12 V to 12.3 V
Battery is empty or
charged up to approx.
50 %
Red, yellow, and lower
green LED are lit
12.3 V to 13.5 V Battery is charged from
approx. 50 % to fully
charged
All LEDs light up Over 13.5 V (Only appears while
charging)
Total discharge causes irreparable damage to the battery.
When the battery alarm comes on, switch off the appliances and charge
the living area battery, either by mobile operation or by connection to a
230 V power supply.
8.5.3 LED array for tank fill level
The LED array (Fig. 50,6) displays the fill level of the fresh water tank or of
the waste water tank.
Press the button " " (Fig. 50,4): The fill level of the fresh water tank is dis-
played by lit LEDs.
Press the button " " (Fig. 50,5): The fill level of the waste water tank is dis-
played by lit LEDs.
Off-load volta
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