About the warranty, do you mean that factory warranty stop when I install it by my self ?
Yes. But if you are lucky the dealer may not know that you have installed it yourself and maby they dont ask. In that case you might be abel to use the warranty anyway. ;-)
I understand when I have a problem I need to fix it by my self and if I can not fix it I have to find someone who can fix it.
What I mean is that it might be more difficult to find anyone who want to

you since they haven´t installed it for you. But you can be lucky with this as well as with the warranty if needed.
What is the main difference between the on/off and the inverter ? I mean does the on/off have a thermostate to keep the temperature at 20° ?
Will they auto restart after power failure ?
Both types (OnOff & Inverter) have a temperature sensore used to measure and for regulating the temperature. So there will not be any major differense in the indoor temperature depending on which type you select.
Inverter is a thechnique for regulating a motor speed which makes it possible to set any rpm from 0 to maximum speed. And we are here talking about the compressor speed in the outdoor unit. While OnOff can´t set any other speed than 0 OR maximum speed.
This means that an OnOff pump only can deliver 0 watt OR maximum watt. The sensore are then used to switch the compressor on or off = the temperature variation indoor will be slighty bigger than with a inverter type of pump which can set ANY effect (watt) between 0 and maximum. Så if only 20% effect is required the inverter type set the speed to 20%.
Both type of pumps will restart automatically after power failiure. There´s no difference.
The FLSC-09HRDN1QC2 cost 7043kr and you write 8803kr + installation. Do you mean that 8803kr is including installation so installation cost 1760kr ? Is that after ROT ? If so then I have to pay ±3520kr for installation because I don´t have ROT and that is 50%.
Sorry, I was unclear.
In sweden you (I, everyone) have to pay tax. The tax for things such as a pump is 25%. And the prices on Refrico list is excluded this tax. If you have a swedisch company you do NOT pay this tax.
So 7043kr (excl tax) + 1760kr (25% tax) = 8803kr
I hope this helps you to understand what I ment!?
Regards!
// Niklas