CTA Aeroheat heat pump settings for improvement

Volume flow 1900l/h is therefore suitable. Damn, is the sensor correct?

Volume flow 1900l/h fits then. Sensor, right?

Which sensor?

Flow and/or return sensors

What do they look like? The pipes are insulated, unfortunately I can't see much...

I have pulled the current DTA again. The last disturbances were:

16.10.20 06:58:07	Tempdiff. defrost (724)
15.10.20 20:21:09	Tempdiff. defrost (724)
15.10.20 08:34:10	Tempdiff. defrost (724)

Attached is the progression of TRLsoll, TVL, and TRL. The yellow marked areas are the disturbances. What could be the cause?

Hm, this only occurs during defrosting while heating the hot water. Is it a software problem? A control issue? I would get in touch with the manufacturer to see if this is known there.