Fanuc 0i Error Code 444

Fanuc CNC Critical Servo Alarm

Model: FANUC Series 0i / 0i Mate | Code: 444

Applicable Systems
Series 0i Series 16/18/21 Alpha Beta

Symptoms

4th axis digital servo system error detected.

Possible Causes

  • Digital servo system detected an internal error.
  • Servo amplifier or encoder hardware fault.

Troubleshooting Steps

  1. Step 1: Check servo amplifier status and connections.
    Amplifier status verified.
  2. Step 2: Replace the servo amplifier if faulty.
    Digital servo error cleared after replacement.

How to Reset

Fix the servo system error and reset to clear the alarm.

Related Fanuc Fault Codes

Source: Fanuc 0i/0iMate Alarm Code List, FANUC Corporation

Category: CNC