I don’t know what has happened and I have never seen it behave like this before. I haven’t changed anything. There is no back up or booster heater, I don’t even have feeds for them anymore and my Daikin doesn’t have a back up heat anyway. Ignore the room temperature as the sensor is on top of a radi…

My conclusion is that it’s a cheap and nasty pos. It kind of works but just frustrating. I ask it to increase the flow temperature and it is just ignored. It changes flow temperature at will, either up or down. Whatever I do, it’s never really stable and doing what is asked of it. And then it’s…

[image] Chris_Hill: Does it shut off completely ?? I think so, I am sure others will chime in if i am wrong.

another thought , octopus left my heating circuit at 1.5 bar and i have been making sure it stays around 1.5 bar , i have just been looking through the daikin stuff and 1.5 bar is the minimum pressure so i am going to increase mine to 1.8 bar and see if it makes any difference

My installer did say he like to leave it closer to but not more than 2 but didn’t say why and I didn’t question it at the time.

@matt-drummer with the significant radiator changes made to the system did you also look at the pipework calcs?

Hi Ben, No, I just fitted much larger radiators. Why do you ask?

[image] meatballs: @matt-drummer with the significant radiator changes made to the system did you also look at the pipework calcs? Hi @meatballs , is this what you are thinking? [image]

[image] tiger_cook: Like all trial-and-error methodology, make one change and see the result. The immediate result is now on the MMI screen I can see the LWT at 35 not 31, can your system get up-to 24 L/min on an air purge test (I think you also have limited the pump to 60%)? If not, could this…

Hi Neil, My flow rate is only affected at the start of a space heating cycle in reality. All my 60% limitation does is stop the amount of heat produced in the first 20 minutes or so and this is only of use when running low flow temperatures at higher outdoor temperatures. Otherwise I don’t need t…

Hi @alibloke , I was told the firmware was supposed to improve the responsiveness of the expansion valve. That’s all I know and I can’t say I noticed any before/after changes from my monitoring of it using ESPAltherma. I think the big improvement for my system was getting the tape heaters disabled. …

[image] Chris_Hill: This is a long shot , I did see some strange behaviour once , after a change I made to the weather curve . This continued for a few hours and after that I removed the mmi causing it to shutdown ( pull just at the top ) after the reboot things went back to normal , might be w…

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Something has gone quite wrong with my 8kW Daikin today!

Hardware Heatpump