We installed this little WeatherKing in a rental double a few years ago. The landlord, like most, doesn't believe in maintenance. Greg was working on the adjoining unit when he heard this one come on, the scroll compressor "screaming in pain".  Upon inspection, he found the outdoor coil plugged shut with lint (in the picture, it has partially been cleaned, note the lint at the bottom of the coil). But look at the vine that had been growing UNDER the cabinet. After cleaning up the unit, the compressor was barely audible, the way a Copeland scroll should be.