Hi,
The Mistral 2000 is very sensitive to electrical interference, when your remove the front panel you have probably noticed that the mains input is precariously close to the processor and the abundance of ferrite around the input signal connectors.
A taco error is a very common fault with this model and my advice initially would be to perform a software reset. This can be done by manually opening the lid via the emergency lid release (insert a long terminal screw driver into the small hole in the left panel of the centrifuge), switch on, push the CE button a few times, switch off, switch on and run a test.
9 times out of 10 this clears the error until the next generator test!!
I hope the above information is not to late as I only occasionally check this site, but if you do feel you require any more information please don't hesitate to contact me on the number below.
Best Regards
Colin Bradnam
DJB Labcare Ltd
www.djblabcare.co.uk Tel: 01908 612598