So new complete enclosure arrived. Wired it in.

Guess what - no better than before. Still chattering contacts before they stay in and machine runs.

Have talked to Felder, they have no answers.

Talked to Transwave after checking I have 400V+ on all pin to pin connections at plug and in machine.
They are of the opinion that there is no problem with the Transwave unit. It would have to be returned to
them if there was. Especially as other two machines I have work fine.

Have returned the machine to a usable condition, just with chattering contacts before it runs.

Any more help suggestions gratefully received, to solve this annoying mystery.