Safety first: Turn off the circuit breaker. Only qualified persons should open the terminal block cover.

Steps:

Verify supply: Check that the cooktop/range is connected to the correct voltage (e.g., 220–240 V single-phase or 400 V 2N/3N as per rating plate). Use a multimeter if you are trained.
Inspect terminal block: Remove the rear or bottom cover to access the mains terminal block. Look for loose screws, discoloration, or melted insulation. Tighten terminal screws to manufacturer torque specifications.
Check neutral and earth: Ensure neutral and earth connections are secure and correctly wired according to the SMEG wiring diagram.
Test again: Restore power and test at lower power settings first. If E3 only occurs during high power and supply voltage is stable, the power module may be oversensitive or failing.
Module replacement: If wiring and supply are correct, replace the induction power module.

Warning: Working on live mains wiring is hazardous. If you are not qualified, contact an electrician or SMEG service.

Induction cooktop shows E3 and shuts down when high power is selected

Possible Causes