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.

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

Category: CNC