08410000 hex

Overvoltage Error

Omron · NJ/NX-series Machine Automation Controller

What does 08410000 hex mean?

The main circuit power supply voltage (P-N voltage) exceeded the operation guarantee range. This indicates an unsafe voltage level in the main power circuit, which can damage components.

Common Causes

  • The P-N voltage exceeded the specified value
  • The input voltage increased
  • The Regeneration Resistor wiring is broken
  • The External Regeneration Resistor is set or selected inappropriately
  • Servo Drive failure

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Measure the incoming AC supply voltage at the main circuit power terminals of the Omron controller and compare it to the specified nominal voltage range.

  2. 2

    Inspect all main circuit power wiring and connections for looseness, corrosion, or damage that could lead to voltage instability.

  3. 3

    Verify the proper operation of upstream surge protection devices (SPDs) and line filters to mitigate potential transient overvoltage events.

  4. 4

    Check the Omron controller's configured power supply monitoring parameters and input voltage thresholds to ensure they align with the actual installation and manufacturer specifications.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Omron NJ/NX-series Machine Automation Controller