DT 220 B control and switch panel instruction manual
17
Issued: 30.06.2006
830.588 BA / EN
5.5.2.2 Battery voltage
The following table shows how to interpret the displayed leisure battery vol-
tage correctly. These values apply to actual operation, not off-load voltage.
Battery voltage
Description
10.4 V or less
F
Risk of total discharge
F
The battery monitor switches off all
consumers immediately (apart from
the frost protection valve)
11 V or more
12 V power supply can be switched on
using the main switch
10.5 V to 12 V
F
The battery alarm will be triggered if
the voltage drops below 12 V
F
The battery capacity will be set to
“zero” if the voltage remains below
10.5--12 V
1)
for more than 1 minute
F
The system will be switched off if the
voltage remains below 10.5--12 V
1)
for more than 5 minutes
12 V to 13.2 V
Battery off-load
More than 13.2 V
Battery is being charged: Main charge
13.8 V constant
Trickle charge voltage
14.3 V
Final charge voltage (full load)
F
1 hour for lead-acid battery
F
8 hours for lead-gel battery
1) Depending on the current load
Measuring the off-load voltage is an additional way of assessing the condi-
tion of the battery. Off-load voltage is the voltage of the charged battery in a
passive state, with no current being supplied or drawn.
Take the measurement several hours after the last charging. In the mean-
time, no significant load should have been placed on the battery, which
means no current should have been drawn from it. If the off-load voltage of
the battery is less than 12.0 V, there is a risk of total discharge.
Y
It is best to make the check in the morning before the 12 V consumers
are switched on.
The battery voltage is too low if “CHARGE” is displayed and the battery
must be recharged (see Chapter 5.6.1 as well).
Y
When starting up the system again the battery voltage of the leisure bat-
tery should be tested before starting up the engine and before connecting
the vehicle to the network. If idle for max. 6 months (and if the battery
was previously fully loaded) the battery charge should be above 12.7 V. If
the voltage is below 12 V the battery is probably faulty.
Battery status
Off-load voltage
