Air-water heat pump current consumption and data

Does anyone of you know how I can reduce the compressor power on a Stiebel Eltron WPL A05? The heat pump is running continuously at 25Hz and consumes about 600W.

That's already really very little?!

Yes, it's already fine. My Lwz_5_s_plus runs minimally at 0.4kW at 20Hz. Once it has settled down.

I don't know yours, but since it's the same manufacturer:

[*]Integral part max.
[*]Possibly reduce proportional part
[*]"Heating design" as low as possible (e.g., 50%)
[*]Design temperature as low as possible (max NAT, or also try minimum sometimes)

Try and study ;)

permanently at 25Hz

Or does that mean something non-modulating?

Yes, it’s already fine. My Lwz_5_s_plus runs minimally at 0.4kW at 20Hz when it has settled down. I don’t know yours, but since it’s the same manufacturer:

[*]Maximum integral part [*]Possibly reduce proportional part [*]"Heating design" as low as possible (e.g. 50%) [*]Design temperature as low as possible (max. NAT, or sometimes try minimum)

Try and study ;)

The design is already set to -20. Unfortunately, I can’t adjust the other options.

Or does that mean something is not modulating?

It does modulate, but not below 25Hz. It could of course also be related to the outside temperatures, since the heat pump has only been operating since the end of October.