Underfloor heating air-water heat pump. House too warm when the sun shines

Please only open and post the file from the last DTA. That makes it clearer, thanks

Are there already any information about the heating circuit lengths and laying distances? The hallway is still too warm, are the HKV located there? What flow does the heat pump control indicate and what do you simultaneously read off the flow tubes? According to the statistics, you have already had heating cycles over several hours, significantly better than before!

Just as a question, is there a difference in the length of the heating cycles depending on whether the heat source is air or geothermal energy? In the case of geothermal energy, in my opinion, it would recover faster with shorter heating cycles.

Could you please only open and post the file from the last DTA? Then it’s clearer, thanks

Sure, gladly, I’m attaching it.
Unfortunately, the company still hasn’t provided me with any documentation, I’ve asked three times already. He said he would do it as soon as he has time... well, I’m staying on it.
There is a HKV on the ground floor, the second one is in the utility room in the basement.
The tubes had a roughly 1059 l/h flow yesterday morning. The flow rate on the system shows: ----- l/h
so no value?!

Dec 21, 8:30 a.m., what do you think of the value? Much better, right?

Yes, better, but. It looks like the return temperature rises rapidly at the beginning of the heating cycle. For me, you can only see a rise after more than 10 minutes. You have a "short circuit" somewhere. The bathroom radiator runs without heating water from the heat pump, right? If so, you can see from the curve that plenty of heating water still flows past the underfloor heating via the bypass valve. This unnecessarily shortens the heating cycles and leads to cycling. You can enlarge the curve again from the beginning of a heating cycle.

Yes, better, but. It looks like the return temperature rises quickly at the start of the heating cycle. In my case, you only see an increase after more than 10 minutes. You have a "short circuit" somewhere. The bathroom radiator runs without heating water from the heat pump, right? If so, you can see from the curve that plenty of heating water still flows past the underfloor heating via the bypass valve. This unnecessarily shortens the heating cycles and leads to cycling. You can enlarge the curve from the start of a heating cycle again

Could it also be because I only have 1059 l/h flow instead of the 1600 that the LAD 9 requires? Exactly, the bathroom radiator runs on electricity, independent of the air-water heat pump.