So, the spindle isn't working now, after resetting anything that might need resetting? To be honest, a 9kw spindle probably could happily try to route wood with a collet nut without overloading...it's very powerful. The Z motor, in a well designed system (and Techno is chinese system with some western know-how added in), should have had a torque overload from trying to get into solid wood....that might have tripped a machine enable of some sort too. I've done this in plastic with a spindle half as powerful but never any permanent damage.
You've called techno?