I find the whole story to be ... typical.
The installer did his job - the gear was working when he left. Now the responsibility is for you, your firm, the production as well as the maintenance folks, to learn the equipment and behave accordingly.
You're right in suspecting that this isn't a technical issue so much as a 'stress' issue. There's plenty of stress just in learning a new piece of equipment - let alone in re-doing the conduit runs, etc., once you've figured out that you put everything in the 'wrong' place.
So, what to do about stress? If only the matter were so simple. The first challenge is getting stress recognized in the first place, as a detrimental factor just as real as, say, the effect bad weather has on outdoor work.
Production schedules look nice on paper, but they usually ignore reality - and then everyone gets stressed out because "we're not meeting our goals." The problem isn't the people or the equipment ... the problem is the goals.
Sometimes you just have to be the 'bad' guy. As in ... if you're denied necessary training and maintenance time, you just have to let it all fall apart. Then, make clear that poor planning on their part does not constitute an emergency on yours! Risk your job? Perhaps - but then they still have to fix the machine. (FWIW, I know of one such place that has been crying for help for nearly a year - they still have not figured out that THEY are the problem).
Otherwise ... REST is needed. As in: go home, walk the Milford Track, there's NO WAY their 'emergencies' can interfere with your REST. 24/7 operation? Sure, lots of places attempt that; maybe they'll eventually learn that the idea of a 'sabbath' has some merit.
Now, it is possible that there's a role for certain medications, under appropriate supervision. Things like 'beta blockers,' that can help a man deal with the stress he generates all by himself. You'd see a doctor if you had overactive sweat glands, wouldn't you? Well, the parts of the body that control our emotions can get out of whack as well.
Ultimately, it may come to "voting with your feet." That is, telling them they have a choice: they can survive without you on weekends - or they can survive without you forever.
