Ämne: Invest Living New Basic - probleme to maintain the set temperature

[Nathangreem]

Hej,
First of all, sorry for the english. I moved 1 year ago in Sweden and I'm still learning.
I have recently owned an house where the luftluftvärmepump invest living scandinavia New Basic was installed as main heating source. My problem is that it is quite difficult to understand how the heat pump regulates the temperature. With a set temperature of 18°C I have different kind of regulation. Some time it is doing long cycle by increasing the inside temperature to 19,5 °C and by letting decrease to 17,4. Some times it is very shirt cycle where the heat pump run during few minutes (5/10 mins) stop 3/4 minutes and start again to heat. The main consequences of this is that the temperature can increase till 20,5/20,8 and that the heat pump restart even if the temperature is still arround 20,5.   Could that be due to the themperatur sensor? Is that something fixable or better to change for a new one?
Tack för hjelpen.

Nathan.

[Rickard]

Most heatpumps regulate the output guided by the outside temp sensor - the colder outside, the varmer water it produces.
If the outside temp sensor is affected by sunlight varming it up, this could be the issue.
If not, it probably is the controller thats poorly designed.
Invest Living heat pumps has not been a great succes as far as my understanding is.

[Nathangreem]

Tack Rickard.
Unfurtunatly, there is no sunlight on both outside/inside units. Outside unit is below the house when the inside one is far from any windows and now it's coming more and more difficult to see the sun in these times of darkness.
When you say "poorly disigned" you mean that it is the machine and nothing that I can change?
By looking arround, I saw that invest living is just resaling Chigo heat pumps from China. Then it is almost not possible to get any information on the product. I asked them to give me the curve scop/temperature. They sent me something that does not correspond to my heat pump. Also when you look at the product sheet, depending on which website you are looking you can't find the same information: scop 4,0 or 3,8 or... in an intermediate zone. Therefore I can understand why the success was poor but can't understand why this company still continue to install heat pumps.
Thanks for your anyway

[Rickard]

I have no deeper knowledge about this heatpumps, mostly due to the facts you are writing about, poor information, manuals, and support from the sellers makes it hard to assist, even if i really would like to be able to assist you.
Maybe someone else have made a larger effort then me, and they might assist you.