Machine:Mazak VQC 20/40B with Mazatrol Cam M-2 controler.

Alarm Nr256.
Head lubrication alarm.
The spindle lubricant level dropped,or an alarm signal was given by direction control unit.This is the alarm and the description off it.
Can anybody add some usefol information to these,and whot to do becuse the Mazak manual give very little solutions.
Is it posible macine can be overheated.