CONTINENTAL EDISON CETI3BFLEX Guide D'utilisation page 63

or
or
Make sure the display shows "0" and "H" .
3. Turn off the hob completely by pressing the ON / OFF
switch.
Beware of hot surfaces
Residual heat indicator
"H" indicates which cooking zone is hot to touch.
The indicator will disappear when the surface is cooled to a
safe temperature.
If you want to heat other pans, use the zone is still hot for
energy savings.
Energy saving : To keep a dish warm, you can use the hot surface indicator ( "H").
or
or
and
EN-22