Subject: Troubleshooting and Repack Procedure for Fanuc Servo Alarm 414 (Z-Axis) Alarm Code: SV0414 (Series 16i/18i/21i/0i) or APC 414 (Series 0/10/11/12/15) Symptom: Digital servo system error; Z-axis movement prevented. 1. Alarm Definition On a Fanuc control system, a 414 Alarm indicates a "Digital Servo System Error." Unlike generic alarms that simply state "Overtravel" or "Overload," the 414 alarm is a catch-all for internal servo processor faults. It means the CNC control has detected an abnormality in the servo loop regarding the Z-axis motor or amplifier. Poly Track Google Sites 📥
Because this alarm appears on the Z-axis (typically the vertical axis), it requires immediate attention to prevent the axis from dropping (falling) due to gravity, which can damage the tooling, the workpiece, or the ball screw. To properly repack or repair the machine, you must look beyond the "414" number. The control generates a detailed sub-code displayed on the diagnostics screen. You will typically see a format like this: 401 DGN 201 . Filmydhoomcom Teri Baaton Mein Aisa Uljha Ji Best