E5 on 1-plate Stoves   |   E7 on 2-plate Stoves

This error code normally indicates that the appliance has overheated, and for safety reasons, it switches off.
Give the unit about 5 min to cooldown (by removing the cookware), and then continue with your cooking.

The reason for the error is simple- under the glass-top, a small sensor monitors the temperature of the cooking surface.
Should the temp reach critical, the point where actual damage can be done to the appliance or your cookware,
the stove will go into error mode, and cooldown (you’ll note the fan remains working).

The simplest way to work-around this cautionary feature,would be to place your cookware on 3 coins.
The coins will lift the cookware from the surface (about 2mm), allowing the cooking surface to remain cooler for longer.
Caution is advised when trying this, as the coins will become extremely hot, and should not be touched until properly cooled.