2 flashing errors I & U how to fix?

I have a Schott Ceran Neff T44T Induction Hob. Yesterday the left side 2 rings stopped working and on the centre control instead of 0 to 9 for induction heat settings for both rngs I get "I" flashing to "U" and both rings do not work. The other 3 rings work fine.

please help
Hob is 15 months old and like new and it cost over £1000 !!