When your POT keeps blinking and beeping it means that the beaker cannot connect to the connection pins in your POT, this can have several causes.
- There is dust or something similar in the opening of your POT. Check this and if necessary clean it with a dry cloth.
- The sleeve of the beaker has slipped down a bit. If you put the beaker in the dishwasher or cleaned it by hand, the sleeve may have slipped a bit.
Check that the sleeve fits completely on the flat lid or the lid of the filer. Make sure there is no space between the sleeve and the member.