Ice formation brine pipe heat pump

So you can already feel that the floor is slightly warm, in the bathroom you notice it the most because a higher temperature was set here.

The outdoor temperature sensor currently says 18°, but it is corrected to -1.5°. The flow and return temperature of the heating are currently 24°. However, the system has not been running for a longer time since I turned off the cooling circuit....

maybe a stupid question: what are the target temperature values for the return flow in heating mode, and how are they in cooling mode?

That's a good question to which I unfortunately can't find an answer, I can't find any return setpoint in the menu.

The system ran briefly for a few minutes now after more than 2 hours of pause, I took some pictures, maybe it helps...

Observe the heating and its behavior after you have turned off the cooling. Before, you had a cycle of the heating approximately every 20 minutes. How is it now? Could it be that cooling and heating interfered with each other ß When I look at your operation log and see that in one week it both heated and cooled, then something is wrong. I mean, if you raise your screed to 25°C and then immediately cool it down again so that the heating has to raise it again, then I also know why the compressor runs so much and where your heat has gone - namely into the cooling.

I have uploaded a few more pictures. The week with heating and cooling might be because at the beginning of the week we still had 28° and sun and at the end of the week only 10° and rain. Maybe that's why?

I have posted a few more pictures. The week with heating and cooling could be because at the beginning of the week we still had 28° and sun and at the end of the week only 10° and rain. Maybe that's why?

the new photos look better already. I assume you only take photos while the compressor is running, right? Temperature readings during the heating system's downtime are meaningless.

Yes, only when it is running. It ran a maximum of 5 minutes, but as I said, since the cooling is off, the compressor has not been on for over 2 hours now...