Beko Ceran Hob - Flashing H?

When for the first time I plugged in my Beko Ceran Touch Control Hob, I got two 'H' symbols flashing repeatedly on LEDs which correspond to top and bottom right zones. When I turn on the hob, I get zeros on left zones and static 'H' symbols on right zones. All zones seem to be working.

Is there some fault with the device? How can I make the 'H' symbols go away?

The model is BEKO HIC64403

Thanks