Fanuc Os-144 System Error ((top)) ⟶

or following a software update that didn't complete correctly. Hardware Conflicts

A machining center would randomly alarm OS-144 only during tool changes. The sub-code was 0C03 (bus error). After verifying grounds and reloading parameters with no success, the technician replaced the main CPU board. Resolved. The bus chip had developed a hairline crack. fanuc os-144 system error