So after a lot of emails back and forth to the supplier, they finally agreed it was a faulty unit and sent a new VFD out last Thursday, it arrived yesterday and it worked instantly, exactly as I expected the 1st one to work... so all along I've been questioning if it's me... and for once at least it wasn't!! I so happy, I had planned to finish this whole build by now but this has set me back a number of months, so no doubt I'll be posting on here when I get stuck again so stay tuned.. thanks again for all the help so far