Thanks will have a look tomorrow downside is I do not understand electrics too well, here is the link PI8000&8100 series Frequency Inverter Manual.PDF_免费高速下载|百度云 网盘-分享*限制, looks like I got the name wrong reason you could not find it.

If you see anything that could direct me what to do to test & reset that would be great.

Another question should the shield of the motor cable be connected to the plug on the motor cable & to the other end say the heatsink on the VFD, when I first made the connection I did not connect the shield to the heatsink and I got noisy steppers after connecting the noise had gone, on inspecting the plug end I noticed the shield was not touching the metal plug could this have been the reason for error.
Thanks

Phill