I am hoping someone can help me. I was setting up a students project yesterday, facing the front of the billet to zet the Z offset. I was running it manually with a M04 S500 code in the MDI screen.
When we finished I pushed the pause button to shut off the spindle and I got the following error code.

7901 initialize door

error 6903 plausibility of main spindle ,


At this point I cannot open door to initialize it,

I have shut off the machine and the PC and when it comes back the error is still present and cannot be cleared with the reset button.

The machine is brand new and I am wondering if there is a failure of some sort.

Is there a way to master reset everything?


Many thanks


Rodney