Generic Chinese VFD, no CE and no earth connection to exposed metal heatsink

[Jeff]

A quick update. I wired in the VFD (including bonding the heatsink to my star earth point), and it's a dud. Everything powers up fine but when attempting to run the spindle it just trips into current overload. Whilst proudly bearing the HY badge and looking near identical to a genuine HuanYang inverter on the outside, the internals bear no resemblance and there are only about 30 editable parameters, none of which relate to motor current.

To give credit to the vendor they have refunded me in full and told me I can keep the spindle, but looking at the prices for a decent 4HP inverter I've decided to run with a Kress 1050 for the time being.

Buying Chinese stuff really is a crapshoot.