Fanuc 0i Error Code 443

Fanuc CNC Major Servo Alarm

Model: FANUC Series 0i / 0i Mate | Code: 443

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

Symptoms

4th axis error register overflow detected.

Possible Causes

  • Position error register overflowed due to excessive deviation.
  • Servo system unable to track the commanded position.

Troubleshooting Steps

  1. Step 1: Check for mechanical obstruction.
    Obstruction identified.
  2. Step 2: Verify servo motor and encoder functionality.
    Functionality verified and alarm cleared.

How to Reset

Clear the overflow condition and reset to clear the alarm.

Related Fanuc Fault Codes

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

Category: CNC