Mariana was the lead technician on the night shift at a medium-sized auto parts plant. At 2:00 AM, the main air compressor—an Ingersoll Rand with an Intellisys controller—shut down with a flashing red alarm:

The first result was a legitimate PDF from an industrial equipment support site. She downloaded it, scrolled to the alarm codes section, and found the answer in under two minutes.

The backup compressor was undersized. Within 15 minutes, pneumatic tools slowed to a crawl. Production stopped.