Fanuc 414 Servo Alarm Z Axis Detect Error Repack ((hot))

If the brake disc fails to release fully when the CNC commands a VRDY (Drive Ready) signal, the servo motor will literally fight its own mechanical brake. This friction instantly trips the 414 alarm via overcurrent.

A "re-pack" generally refers to a major maintenance event where the servo motor, amplifier, or encoder is replaced or rebuilt. When a 414 alarm occurs in this context, it is rarely due to wear-and-tear; rather, it is almost exclusively the result of installation errors, compatibility mismatches, or initialization failures. This paper serves as a guide for technicians to resolve this fault efficiently. fanuc 414 servo alarm z axis detect error repack