Okuma Alarm-B 2791 M spindle head cooling unit
The overload relay for the spindlehead lubricant cooling motor became activated.
Code
1->The combination unit lubrication pump operation signal remained OFF for more than 3[s] while the hydraulic unit signal was ON and the M spindle was running.
2->The combination unit lubricant level normal signal remained OFF for more than 3[s] while the hydraulic unit signal was ON.
3->The combination unit lubrication pump operation signal remained OFF for more than 3[s] while the hydraulic unit signal was ON and the spindle was running.
Probable Faulty Locations
The lubricant cooling unit within the combined hydraulic unit is faulty.