Alarm on Spindle Start/Spindle Orentation

So I have recently bought a 1997 Partner VM16 with a Centurion 6 Controller as an addition to my backyard/part time shop. It has powered up and ran great, i've only had it a month but I have picked up on programming it and have ran several small parts successfully...until today. The machine turns on as normal it homes, jogs, hand wheels fine, you can edit and do anything on the controller. BUT I am getting ERROR 450 Emergency stop(and machine shuts down just like i hit the Estop) if I use M3,M19 or M6 in MDI or push CW or CCW spindle start on control panel. It will also do it if I start program on the tool change.
Anyone have Ideas????