Brother of The Benz, aeklo
I was of the opinion that in Norway you lowered a window for natural A/Cing.
Even though you only use the A/C a few times a season, this type of service is the worst on the system.
Running with a partial charge of refrigirant leaves a major portion of the compressor oil in the evaporator and damage can occur to the compressor.
Have the system recharged to optain operational condition; then have the leak isolated and repaired.
You in Norway and me on the Gulf of Mexico have oposite seasons yet the A/C is still desireable.
Happy Trails Beep Beep from The Spiderman in Houston, Texas USA!!!