Okuma Alarm-C 3711 Air pressure
None->The air source pressure has dropped.
1->The air source pressure of oil mist unit is low.
2->The pressure of air for checking that the chuck clamps and that the tailstock holds declined.
Probable Faulty Locations
Air source pressure dropped. (I/O check NO.24 INPUT bit 5 iARW/ (B-setting) has been turned OFF.)