My new heat pump is going OK but I am a bit disappointed in one aspect.
I just doesn’t want to run at times and I don’t understand why.
I have tried everything I learnt from my multitude of issues with the 9kW Daikin but it is hit and miss.
I just want a heat pump I can turn on and let it run, do DHW and then resume heating again.
I don’t really expect any answers but maybe somebody sees something I can’t.
I haven’t changed any settings but I just don’t understand the issue.
Here is the last couple of days, it runs for 44 hours with no issues.
All good until it tries to get going again after the DHW run, I just don’t get what is stopping it running.
I could run at lower flow temperatures if I could get it running in the first place.
The start up is quite aggressive with a high flow rate.
I have tried my old tricks of limiting the flow rate and I have run with a tighter dT. But limiting the flow rate didn’t really work and it applies all of the time so is of no help really.
My heating system is the same but this heat pump seems to struggle with a constant flow temperature and heat output.
When running at a dT of 3c it really seems to struggle with finding a flow rate to maintain the requested dT.
To me it looks like everything is based on the return temperature, you set a flow of 29c and it forgets this and just concentrates on a return of 26c.
None of it really works.
I have tried using the Madoka and a weather curve but the result is the same.
Maybe just leave it alone and let it sort itself out? The really short cycles bother me, not what I am used to but I see most of the others from this family of heat pumps doing the same.
I called Daikin today but they don’t even understand what I am talking about.
Also, the overshoot is fixed at only 1c, I cannot start at a higher flow temperature and turn it down unless I am really lucky and watch it at just the right time.
Turning it down when it is overshooting the requested flow temperature just results in it turning off and restarting with all the problems listed above.
I don’t understand why it starts with such a high flow rate, it produces too much heat at the low flow temperatures.
It could be really good but I can’t spend my whole life trying to coax a heat pump to heat my house every time it stops to do DHW.
I don’t understand why it is stopping after only three or four minutes?