[Ourindar]

ISSUE RESOLVED: See self-reply below for details.

Howdy everyone,

Having an issue with an Okuma LB-15 lathe with OSP5000L-G control unit. Was wondering if anyone had ever encountered similar.

The machine boots fine; however it displays alarm code 108. I understand that's commonly an emergency stop code, however I've confirmed that the emergency stop on the control panel is in working condition (by taking the front panel off and doing a continuity test on it). The emergency stop is not engaged and the alarm code does not go away on reset.
I figured it might be a bad relay in such an old machine, so I dug through the diagrams and found that relay CR3A switches the bit referred to by the alarm code book that sets the alarm. I tested the relay and can confirm that the coil and contacts are operating properly.

I've heard it's possible that a module that's no longer present had been e-stopped before being disconnected. Is it actually the case that such a thing would not be normally resettable? And if so, what's a possible solution?

Thanks!