Some electrical troubleshooting on a notoriously troublesome compressor. This particular one was for a company in Tewksbury, MA. The complaint was that the compressor entered an endless idling state and would not go into stand by mode. The only way they could turn the compressor off was to shut it off at the electrical disconnect. This issue was resolved in just a few hours!

Troubleshooting an Atlas Copco at a company in Tewksbury, MA