Infiniton SBS-440DAB Guide D'utilisation page 56

Refrigerator compartment settings
The default temperature of the refrigerator is 3°C. To change the
temperature press the "Fridge" button to cycle through the set
temperatures.
Unlock
(3s )
6°C→4°C→3°C→2°C→0°C→
Under the locking state, long press"Fridge"button
for 3 seconds to unlock. No operation within 20
seconds, the display will automatically go off.
Set temperature