Fanuc 0i Error Code 402

Fanuc CNC Major Servo Alarm

Model: FANUC Series 0i / 0i Mate | Code: 402

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

Symptoms

Servo overload detected on the fourth axis.

Possible Causes

  • Excessive mechanical load on the fourth axis servo motor.
  • Fourth axis servo motor or amplifier overheating.

Troubleshooting Steps

  1. Step 1: Check for mechanical binding or excessive load on the fourth axis.
    Load condition identified.
  2. Step 2: Reduce the load or allow the motor to cool down.
    Overload condition resolved.

How to Reset

Resolve the overload condition and reset to clear the alarm.

Related Fanuc Fault Codes

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

Category: CNC