Thank You TwoFlower looks like found description of that fault
"e0 The input relay on the ELIN is faulty.
This error is displayed when it is attempted to close the relay by switching on a coil.
1- Switch off and on again to see if the fault is resolved.
2- Replace the ELIN that corresponds to the fault location.
This can be shown on the display if we supply power only to a specific burner.
Instruct the user to switch off and on again and to reset the mains supply."
Now need to find which relay that is.. and strange is that if turn on any hotplate it works.. only shows those when turn off all hotplates.. and it shows that fault for all 4 plates.. also i can hear relays clicking when turn plates off.. but maybe one of them are stuck.