None of my searches for "EEP" code returned anything useful, in fact Google repeatedly changed my search term to EPP (lots of results but not really relevant).

I've tried the power off and on again technique but the error is firmly ensconced.

Replacement VFD is arriving by Amazon tomorrow and once the lathe is up and running I will have a look inside the faulty unit in case there is something obvious (like an eprom falling out of its socket), otherwise its WEE.

Ian

I tried "error code eep" as you suggested and it does return lots of hits, It seems "eep" is used by numerous manufacturers to indicate a memory or processor problem which usually requires the replacement of a PCB (not a realistic option on a Huanyang VFD).

Out of interest Michael, try putting 'eep code' in Google, The first result I get asks me if I meant 'epp code'

I posted originally after I had searched for 'huanyang eep error' and multiple other similar search strings to see if there was known solution. I eventually (actually fairly quickly) came to the conclusion that I was fighting a losing battle. I hate throwing things away and often waste a lot of time trying to resurrect low value items that are just not designed to be repairable. In this VFD the PCB containing the control (rather than the power electronics) has a very thick, epoxy like, conformal coating which makes even inspecting the components very difficult.

The replacement 2.2KW VFD (£64 next day from Amazon) is now up and running although the supplied documentation is really bad even taking the low price into account. I had to resort to trial and error, and some luck when it came to connecting the remote wiring.

Ian P