The product is perfectly fine. Only, I thought, screw on, cap down, old part removed and installed new, cover it and screwed up again. Unfortunately, there is another way: on screws, cover down, as even fall out parts where I do not know where they belong. I also Flege equal under which, since the supply cable is free, so that nothing's going on. Among again unscrew screws, cover from a plate on electronics, remove the upper part, until I get to the bottom, defective part. Can also be properly reinsert. Dazugeholt for further assembling electrician and forsake this assembling. The dropped out parts he had to assign to try. Very tricky, everything back together to build. Had I not manage alone.
