Circulation pump capacity and overflow valve

If I had to check tomorrow theoretically, I can query different values (compressor modulation, recorded electrical power, cooling capacity which should practically be the counterpart to the current heating capacity) in combination or based on each other to yield a value.

In general, regarding the internal HUP, I can only set the residual head and that from min. 250 mbar to max 900 mbar. According to Vaillant, the 900 mbar corresponds to 100% released pump power. But no matter what I set, 250 or 900 mbar, the UWP always shows between 55-65% power as if it were running.

I just don’t know how I can query or simulate 100% for the heat pump, except maybe by opening the heating curve from currently 0.20 to the max at 1.xx?

The internal UWP is probably a Grundfos UPM3 as an OEM version; there are dozens of different versions, mine should have one with PWM installed in the system, which automatically adjusts itself or the flow and the resulting changing pressure conditions due to the closing ERR. But I no longer have active EER, which means nothing changes because no actuators open or close anymore.

Damn time window closed for editing:

Snapshot:
Outside temperature -1°C
Air intake outdoor unit -3.7°C
Flow temperature 27.4 °C
Return temperature 24.2°C
Spread accordingly 3.2K
Building circuit volume flow 610 l/h
Power UWP 56%
Electrical power consumption 0.4 kW
Cooling capacity 1.5 kW

Accordingly 610 l/h x 3.2k x 1.16 = 2264 watts

Well, the current heating output and the volume flow result in a spread of 3.2K. The house is warm, the heat pump runs without errors, so everything is fine. Why do you want more volume flow in the heating circuit? That only lowers the spread, costs more pump electricity, and doesn't improve anything. Somewhere in the menu there should be an option to run the HUP at 100%, how else would you perform the hydraulic balancing?

Then I must have actually misunderstood, I thought the system practically always had to run the ~850 l/h design flow rate in the heating circuit and only adjusted the temperature difference depending on the outside temperature. Learned something new again.