Daikin Altherma data

Hi Jim,

Yes this does look like typical behaviour for the Daikin Altherma EDLA units (which I’m presuming you have). However, this is not good heat pump behaviour, your unit is constantly short-cycling, which is where it is starting and stopping short heating cycles multiple times per hour. Ideally for heat pumps you want them to run with low flow temperatures for a significant amount of time, whilst maintaining the desired temperature for the house. This can prove to be tricky to achieve with the Daikin Altherma units.

I suspect this is because you have your flow temperatures too low for the heat pump to maintain (< 30C). There’s a number of us here on this forum who have the Daikin installed and we’ve shared our knowledge and experience with this unit. I’d suggest searching for terms like ‘Daikin’, ‘Altherma’ and ‘EDLA’ on this forum and read through some of the threads (some of them are very long I’m afraid!).

One useful thread (that isn’t too long) is this one: Daikin 8kW family which contains a number of useful nuggest of information you could incorporate into your system settings, especially if it is one of the EDLA 8kW family members (that means either a 4kW, 6kW or 8kW unit).

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