The refrigerator is beeping every. The refrigerator is beeping every 30 min. about 4 times and the

Question

The refrigerator is beeping every 30 min. about 4 times and the temperature indicator is running from the left to the right back and forth. It looks like this does not have an impact (so far) on the operation; the inside of the fridge as well as the freezer unit seems to be cold.