Dometic CK 40D DC Operating Manual page 8

Operation
6.3 Using the battery monitor
The device is equipped with a multi-level battery monitor that protects your vehicle
battery against excessive discharging when the device is connected to the on-board
DC supply.
If the cooler is operated when the vehicle ignition is switched off, the cooler switches
off automatically as soon as the supply voltage falls below a set level. The cooler will
switch back on once the battery has been recharged to the restart voltage level.
A
NOTICE! Danger of damage!
When switched off by the battery monitor, the battery will no longer be
fully charged. Avoid starting repeatedly or operating current consumers
without longer charging phases. Ensure that the battery is recharged.
In "HIGH" mode, the battery monitor responds faster than at the levels "LOW" and
"MED" (see the following table).
Battery monitor mode
Switch-off voltage at 12 V
Restart-voltage at 12 V
Switch-off voltage at 24 V
Restart voltage at 24 V
The battery monitor mode can be selected as follows:
➤ Switch on the cooler.
➤ Long press the "TEMP –" (fig. 2 3, page 2) button.
➤ Use the "TEMP –" (fig. 2 3, page 2) or "TEMP +" (fig. 2 4, page 2) buttons to
select the battery monitor mode.
✓ Display will be as follows:
Lo (LOW), ΠEd (MED), Hi (HIGH)
✓ The selected mode then appears in the display for a few seconds. The display
flashes several times before it returns to the current temperature.
I
NOTE
When the cooler is supplied by the starter battery, select the battery
monitor mode "HIGH". If the cooler is connected to a supply battery,
the battery monitor mode "LOW" will suffice.
8
LOW MED
10.1 V 11.4 V
11.1 V 12.2 V
21.5 V 24.1 V
23.0 V 25.3 V
CK40D DC
HIGH
11.8 V
12.6 V
24.6 V
26.2 V
EN