Hi, sorry to answer in English. I have a similar problem: I have a heater managed by a vitotronic 200 KW1 that has always worked well. I connected recently a Vitotrol 200a via the included 145 connector. (new retail part) Once connected, the vitotrol is displaying information (in and out temperatures) and the different options are responding. But since the time I first plugged the connector, the Vitotronic doesnt end loading. It displays the loading bar on a full length and half of a second one, then the backlight stops, the bar stops progressing and nothing happens anymore. Meanwhile, the error led will go from green to red **bleep** a few seconds, but the different parts (burner, pumps) are driven. The burner seems to be working while the progress bar is blocked. If I press a button, the progress bar restarts and stops always the same way. In addition, this behavior now happens even when I remove the connector and restart it as it was before. Which means I do not have access to the heater settings and status at all, with or wothout Vitotrol connected. The voltage on the connector is OK, and data displayed by the vitotrol seem right. I cannot find any clue on official documentation or internet, does anyone here have an idea? Thanks!
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