You have left automatic mode temporarily during cooking.
Do not use the cooker hood for approx. 5 minutes after selecting a power level manually.
The manually selected fan power level corresponds to the automatic power level again.
The cooker hood fan and the hob have been switched off for at least 30 seconds. Automatic mode will resume the next time the hob is switched on.
If the cooker hood fan and the hob have been switched off for at least 30 seconds after cooking, automatic mode will resume the next time the hob is switched on.