the invention relates to a control unit (100) for a sick or shortterm with a loading area, and the control unit (100) includes a detektionsmittel that is trained to generate a detektionssignal when a force acting on the loading area of a threshold unterschr eitet, characterised by the fact that the control unit (100) includes a lamp (105)the trained, to prevent defects in the sick - or shortterm to light, and the control unit (100) that is trained on the lamp (105) when the detektionssignal is generated.
