Many thanks for the reply Eddy...you are a true gent.

I tried the settings, it spun for around 30 secs and cut out with a motor overload fault (OL1). Tried playing around with the current and rpm and it gave a few revs and then gave me either motor overload or inverter overload (OL2). Then I thought about what you said about my VFD settings being inadequate...from that I looked at the settings that didn't have a an exact equivalent and worked it out...

The huanyang has an arbitrary v/f curve which you define with the min, intermediate and max frequencies and voltages. The teco has 6 predefined curves (which appear to be for 50 or 60 hz motors). I had to set it to the magical 7th curve which i then defined. Instead of a frequency vs voltage curve, it was a frequency vs voltage percentage. So I put in values that should mimic the curve one ends up with huanyang. So i went for:

'minimum frequency' =1.2 hz minimum voltage percentage (8/220*100) = 3.6%

'medium frequency 1' = 2.5 hz medium voltage 1 (15/220*100) = 6.8%
(equivalent to huanyang's 'intermediate frequency)

'medium frequency 2' ((400-2.5)/2)= 198.8 hz medium voltage 2 ((220-15)/2)= 102.5 v
(huanyang settings didn't have this second point on curve so i just used midpoints between 'intermediate' and 'maximum').

hit play and it spun.

as for the lack of 'number of poles' and one of those 400hz's, i guess that gets taken care of with the motor rated speed (i.e. the vfd needs the product of two variables rather than them individually....). i've set motor rated speed to 24000 rpm. I need to calibrate the display (with the motor synchronous speed?) (think it will be the 3,000 same as on huanyang) and check what rpm count i get but i think it should be ok.

so once again...many thanks for the reply...it gave me the confidence to press 'run' and that was most of the battle. i will report back once i've had another play and got it running at full speed and reading out 24,000. I hope this was not a big no-no to just go for the midpoint between intermediate and max and use that as my 'medium 2' for frequency and voltage percentage but i'm sure i'll soon find out.

cheers