Thank you for the concern I don't deny I know nothing in regards to electrics, I have now sat down and had a lengthly chat with a trained technician (took your advice) and went through a lot of questions about wiring and power usage whilst going through the wiring with a dvm.
My "daisy chain" term I used was actually a "series" connection.
And I was shown that the vfd is connected to the live and neutral connectors on the psu so was getting a DC from the mains and not through the psu.
What I will do is draw up a diagram of my wiring and get it double checked.