Air-water heat pump flow temperatures

exactly the same problem I had too. Then I adjusted the compressor. For me, you can set it like a heating curve. At AT=15C, for example, it only runs at 15%. I also have 8kW

I don't want to hijack the thread. I could probably adjust the hysteresis. But the fundamental problem of the machine being too large is not solvable.

If your system runs continuously for 8-9 hours during the current transition period, everything is generally still in the green zone.

Yes, consumptions are fine and it's nice and warm too. I'm currently not really in the mood to tackle it :). Never change a running system.

Currently, I no longer know who is meant with which questions here.

My system
Vaillant Arotherm-Split 3.5 kW heating capacity
Heating load of the house at -12°C approx. 2.5-2.8 kW
Currently, I have limited the output via the Füstermodus. However, it still goes above 60%, so the system is still pushing too much power into the system.

ERR are disconnected and the bypass valve is closed or set to the maximum opening pressure that must be present for the bypass to open.

Since the heating load at the current temperatures should hardly be 1-1.5 kW.
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but with 15-20 bars something still doesn’t fit.

do you perhaps have a buffer in the system? :p