The belt winder shows no function? Y. Beenen March 11, 2021 14:07 Updated Check the power supply incl. connection cable and connection plug. Related articles The roller shutter stops in the low position, what can be the cause? Overview of the different electronic belt winders The roller shutter no longer goes all the way up, why? The motor does not stop, end points cannot be set. Automatic functions cannot be activated, why? Comments 0 comments Please sign in to leave a comment.