The dishwasher is still in the active phase, performing its main function, which is cleaning and drying dishes, and therefore is not considered as being 'standby'.
Disclaimer: Please note that the European Commission cannot provide a legally binding interpretation of the EU legislation, as this is the sole competence of the European Court of Justice. Any remarks from the European Commission services are without prejudice to the position the Commission might take should related cases arise in a procedure before the Court of Justice.