The Piranha is sold by Radecal in the UK if you get stuck. The 3 Phase will be for the Spindle VFD and the Single Phase will be for the controller and associated motors etc.
The DSP controller could be one of several, so a model number off the label would be good to get from your mate. The G-Code is generated on the workstation, the files are copied to a USB Thumb drive and placed into the USB Port on the DSP. After selecting the appropriate file and possibly setting a couple of parameters from the menu the job runs right from the DSP.
What is the fault description?
When it all goes wrong, own up and tell the boss it was someone else!