Start: Alarm 414 on Z │ ▼ Check cables & connectors → Loose/bad? → Yes → Fix → Reset alarm │ No ▼ Swap motor with another axis (if possible) │ ▼ Alarm moves? → Yes → Motor encoder faulty → Go to Repack │ No ▼ Alarm stays on Z → Check servo amp & CNC feedback board │ ▼ Replace servo amp or cable → Still alarm? → Replace motor
If you have (like 414 + 424, or 414 + 434) – those suggest multiple axes → look at power supply or fiber optic cable (FANUC serial servo bus). fanuc 414 servo alarm z axis detect error repack