Well, there must be a softkey "change language" available. This softkey you might see after pressing "Inbetriebnahme". This is the german word for start-up or settings. By pressing the Softkey "change language" in this menu the controller will automatically switch to english language. If there are only 2 language packets installed. If there are more than 2 language packets installed the softkey is called "language selection" In this case you press this softkey and then select the desired language.