Fanuc 414 Servo Alarm Z Axis Detect Error Repack May 2026

Coolant finds its way everywhere. If the connector on the back of the Z motor has oil or coolant inside, it shorts the 5V differential signals (PS, *PS).

The amplifier itself can fail. If the feedback input circuit on the amplifier is fried, it cannot read the encoder. fanuc 414 servo alarm z axis detect error repack

The following flowchart outlines the diagnostic process for a 414 alarm after a re-pack. Coolant finds its way everywhere