Hi , I have a refine MH721,
The female plug socket housing cracked , and I was meaning to replace it.
Today I moved machine and realised that I do not know how to wire it up, as wires have become dislodged.
I am unfamiliar with the colour coding of the wires.
I have a a yellow wire that comes via the fuse and on/off switch.
There is a green wire.
There is a green / yellow wire.
If I had to GUESS I would go with-
green - earth,
yellow - active
yellow / green - negative
p.s. I don't know if its relevant , but im in Australia, mains electricity 240 volt