My Siemens american integrated fridge freezer CI36BP01 is beeping and showing E11 but temperatures are fine. It has been like this for 3 days. Please could you advise what the issue could be and how to reset/stop this beeping? The electrician has checked the electrics and the appliance appears to be working fine. Thanks so much kindest regards

Question

My Siemens american integrated fridge freezer CI36BP01 started beeping 3 days ago, showing E11 on the display, but is still working fine and electrics have been checked by electrican and are fine. Please advise how to reset or stop the beeping please.