Air-water heat pump current consumption and data

EdiT: The heat pump has been running for 7 hours now, after 2 hours it starts running again??? Heating curve 25.5/20.5/0.
On the ground floor it is almost 24.8 degrees (exactly like the tile floor) and the stupid thing starts again now. That can’t be!!!

Can only be explained by a thermal short circuit that pumps cold water back.

How do I find Den?

The only thing I changed the day before yesterday was to increase the flow in a children's room from 1.75 to 2 on a radiator with 94m. So nothing wild

Can you measure the return flow to see if it is really 22 degrees? Then also measure the individual circuits to possibly find the short circuit.

However, I suspect that the cold return flow is coming from the basement which is now switched on.

With a flow temperature of 25.5, you cannot achieve 24.8 RT with the current AT. I’m telling you, something is not right at all. And as far as I can see, it is also an AIT or Novelan system.

In your photo, the flow temperature is almost 34 degrees!!!! No wonder, I have never had such a high flow temperature. Do you have a parallel shift applied? I would check that. With the flat heating curve, such a high flow temperature would not occur otherwise.

Everything very suspicious.

Measure and record the return pipes every 2-3 minutes with an IR thermometer. If one is conspicuous, reduce it.

The [je Thermometer für 15 Euro bei eBay] are sufficient.