Okuma Alarm-A 1771 Door open/close limit switch NG
An abnormality occurred in any of the limit switches used to confirm open/close state of the front door and ceiling door.
Code
None->For the door interlock type S spec, a front door open/close confirmation limit switch failed.
1->For the door interlock type S spec, a ceiling door open/close confirmation limit switch failed.
3->For the door of mechanical locking type, a front door open/close confirmation limit switch failed.
4->For the door interlock type S spec and the door interlock flat machine spec, tailstock maintenance door open/close confirmation limit switch failed.
5->For the door interlock type S spec and the door interlock flat machine spec, front door open/close confirmation limit switch failed.
6->For the door interlock type S spec, the APC door open/close confirmation limit switch failed.
7->For the door interlock type S spec, the operation door open/close confirmation limit switch failed.
Probable Faulty Locations
Without indication of code number, a front door open/close confirmation limit switch is out of position or faulty.
1)A ceiling door open/close confirmation limit switch is out of position or faulty.
2)For the door of mechanical locking type, a door open/close confirmation limit switch is faulty.
Measures to Take
1)Check the limit switch positions. Change the faulty switch.
2)Change the faulty limit switch for mechanical locking door open/close confirmation.