Dometic RMT 7650 Operating Instructions Manual page 10

"AUTO"-operation ( AES only )
5.2.3
RM7XX5 L - models are equipped with an "AUTO"-MATIC function.
Explanations:
Upon switching on, the electronics automatically select one of the three
possible energy types: 230V - 12V - liquid gas. The control electronics
automatically ensure that the refrigerator is supplied with the optimum
source of energy in each respective case.
Priority:
The selected energy is displayed by the corresponding LED (i.e. 230V)
230 V - operation
If sufficient supply voltage is available (more than 200V), this power source is
selected as the first option ( no solar-system installed).
12 V - operation
12V operation should only be selected while the vehicle motor is running or there
is sufficient voltage available from the solar system. This can be detected from
the D+ connection of the alternator to the electronics, or from the respective
signal on the solar charge regulator.
Gas operation
Gas operation is selected in the following circumstances:
No supply voltage available.
The vehicle engine is not running.
Supply voltage less than 200V
In order to prevent unintended switching to gas operation during refuelling,
the electronic system starts gas operation of the refrigerator, after the
motor has been turned off for 15 mins. During this time the appliance is in
stand-by operation mode and only the "AUTO" LED lights up.
The use of naked flames is prohibited in petrol station environments.
If the refuelling stop lasts longer than 15 mins., the refrigerator should be
switched off at the main switch "A", or switched over to another energy
type.
1. Set energy selection switch "A" to position
"AUTO".
The LED "AUTO" lights "green".
1.) Solar (12V DC)
2.) 230V AC
3.) 12V DC
4.) Liquid gas
REFUELLING STOP
Manual operation is possible at any time.
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