Sorry to answer in English, my German is poor .... there seems to be a bug in the UM2 firmware regarding this. Controlling Led's should work with @tinkergnome firmware.
Have a look here;
https://ultimaker.com/en/community/view/17756-control-ultimaker-2-leds-via-gcode
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Nicolinux 288
Nein leider nicht - aber wo hast du das her?
Und im Zweifel - ausprobieren
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