Haas CNC Error Code 121

Haas CNC Major Current

Model: CNC | Code: 121

Applicable Systems
Haas CNC Mill (VF/VM Series)

Symptoms

Excessive current detected in the motor.

Possible Causes

  • Short circuit in the motor or wiring.
  • Excessive load causing overcurrent.

Troubleshooting Steps

  1. Step 1: Check the motor and wiring for short circuits.
    Short circuit or overload identified.
  2. Step 2: Repair the short or reduce the load.
    Motor current returns to normal.

How to Reset

Fix the excessive current and reset to clear the alarm.

Source: Haas Alarm Codes, Haas Automation

Category: CNC