Liebherr cnesf 5013 superfrost always beeping

Maybe it is only in the settings, I don't know the details of your ref but I would like to suggest to consult it in the technical experts.... because you said, it is turning on and off but it is working, maybe you only mistakenly click some button but if not, the refrigerator is the problem ( if it is new one, you can return it and replace a new refrigerator but in this case, you need to check it before replacing another one)