How do I switch on the refrigerator for the first time?
Press the % button to switch on the appliance, and it will begin to cool. An audible warning signal and lit button alarm will indicate that the freezer compartment is still too warm. Press the alarm button to switch off the warning signal, then set the required temperature. Do not put in any food until the selected temperature has been reached, which may take several hours.
From the official Bosch Refrigerator manual, page 10
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