Cata MC 25 GTC Manuel D'utilisation page 54

Trouble shooting
It is forbidden to run the unit without any food inside.
It is very dangerous.
According to Waste of Electrical and Electronic Equipment
(WEEE) directive, WEEE should be separately collected and
treated. If at any time in future you need to dispose of this
product please do NOT dispose of this product with household
waste. Please send this product to WEEE collecting points
where available.