Hello, can I write my issue in english? I have problem with Heizung (Vitocal 222), if I set the temperature for heizung (for example 50deg. - see in the picture), buffer tank heats up only for +-30deg and then the pump is switch off. I am completed check service menu with manual and I did not found the mistake, or wrong settings. Can someone help me? Regards, Ota, Czech. rep.
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