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ErrorLib — Industrial Fault Code Library

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Err.

Generic Error

Mitsubishi Electric · FR-A800 Troubleshooting Course

What does Err. mean?

This is a general error indication displayed by the FR-A800 inverter, signifying that a fault condition has occurred. The specific cause requires further diagnosis, typically by checking the fault history or other indicators on the operation panel, as this code is a placeholder for a more specific issue.

Common Causes

  • A variety of internal or external conditions can trigger a generic error, often followed by a more specific fault code in the fault history.
  • Communication error or unexpected state.
  • Incorrect parameter setting not covered by specific fault codes.
  • Temporary power disturbance or transient event.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the FR-A800 inverter's fault history log on the operation panel or via FR Configurator2 for a more specific fault code that occurred just before or concurrently with 'Err.'.

  2. 2

    Perform a power cycle of the FR-A800 inverter (turn off, wait, then turn on) to reset temporary states.

  3. 3

    Verify that all critical parameters are set correctly according to the application and motor nameplate data.

  4. 4

    Inspect all wiring connections (power, control, communication) to ensure they are secure and free from damage.

  5. 5

    Monitor the power supply for stability.

Browse all codes in this manual (16)
Verified technical data. Last updated: April 2026

Related Faults

E.CDOOutput Current Detection Value ExceededE.IPFInstantaneous Power FailureE.LFOutput Phase Loss
Source: Mitsubishi Electric FR-A800 Troubleshooting Course
Open Manual (Page 4)Search more codes in this manual