Help on fault finding on a C3-31 Hammer combination machine

[magicniner]

No desire to be pedantic about this but,
That's not what I meant about 'rule no1' , I meant if there was nothing there when you pressed "start". In other words, "check there is the required voltage at the machine".
The quality of the supply comes later after pressing "start" does it's job.

If I'd been referring to your suggestions I'd have quoted you.
When looking for the source of a fault in a 3 phase electrical system where components such relays and actuators are commonly run from one phase with different components running from different phases then if you don't check what you have before applying any load at all then you can make things harder for yourself.
Just saying ;-)