Hey guys. Maybe anyone can help because the installers are clueless. Had a brand new Ecodan R290 8KW installed in november in Estonia. While making DHW 50c the compressor made really high pitched noise. The installer said it is not normal and eventually the factory replaced the outside unit couple of weeks ago. Well the new one makes the same sound . Its very quiet when making 35c water but DHW 50c it is noisy. The new ecodans dont have that compressor packaging the installers forget to remove so that cant be the problem.
Youtube video. That is brand new out of the factory in feb 26 ecodan r290. Outside temp is +7 degrees.
The second problem is when I turn on the ECO mode for the DHW. The noise turned down but the problem is it started using electric heater. For example today is -1 outside and when the DHW 300l tank came from 50c to 42c it heated it ONLY using electric heater. Again the installer is clueless why it happens because it is supposed to make COP better not worsen it.
That sounds horrible, I don’t have R290 but I cannot imagine that it should sounds like this. Do you have more detailed logging?
Eco mode DHW on my unit typically uses 60-70hz and it’s just the sound of air movement only. It should not trigger the electric heater (I disabled that for dhw, only legionella uses it). When the electric heater is used, it mostly means that the heatpump cannot deliver the request flow temp. But your unit should be able to handle it easily
I dont have any logging. The memory card was removed and sent to the distributor long time ago. I dont think there is any foam arount the compressor only some noise insulation coat.
normally that’s a ‘bad’ sign. The booster heater assist when the heatpump cannot get to the desired flow temp. But you should get some logging to see what is going on
jumping in late here, and i dont think i have anything to add to things already said.. its very weird the element comes on. noise just as odd
Re noise, One old method to diagnose noise is to get a long screwdriver or wooden dowl, put one end pressed onto your ear, the other end on something. The waterboard do this to listen for water leaks from underground pipes. You can listen to the rumble of a bike wheel bearing this way.
No idea if its a helpful tool, but could a surface mic be a useful tool for pin-pointing the location of noise? Possibly a waste of time… I dont know.
. Its very quiet when making 35c water but DHW 50c it is noisy. The new ecodans dont have that compressor packaging the installers forget to remove so that cant be the problem.
because it is supposed to make COP better not worsen it.
