CPU Error

What does 930 mean?

This alarm indicates a critical error within the Central Processing Unit (CPU) of the Fanuc Series 20 CNC. This signifies a severe malfunction in the CNC's core processing unit, leading to system failure and preventing any machine operation.

• Faulty CPU chip or associated circuitry on the CNC main board.
• Overheating of the CPU due to inadequate cooling or fan failure.
• Severe power supply issue (e.g., unstable voltage, ripple) to the CNC main board.
• Corruption of firmware or operating system critical to CPU function.
• Physical damage to the CPU or main board.

Click steps to track your progress.

1. 1

   Power cycle the CNC completely to attempt a CPU reset.

2. 2

   Check all cooling fans on the CNC main unit and ensure clear airflow to the CPU heatsink. Verify ambient temperature.

3. 3

   Measure the input power supply voltages to the CNC main board for stability and correct levels.

4. 4

   Inspect the CNC main board for any visible damage, burn marks, or swollen capacitors.

5. 5

   If the alarm persists, the CPU or the entire CNC main board is likely faulty and requires replacement.