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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

Er3

Calibration error

Mitsubishi Electric · Mitsubishi FR-E800 Variable Frequency Drive

What does Er3 mean?

This error indicates that the analog input bias and gain calibration values (specifically C3, C4, C6, and C7) have been set too close to each other. This can lead to inaccurate analog signal processing and incorrect inverter behavior.

Common Causes

  • Calibration data corrupted or lost.
  • Calibration routine interrupted by power loss or command error.
  • Sensor failure preventing successful calibration (e.g., P2-10 value out of range).
  • Incorrect calibration procedure followed.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check and adjust the settings of calibration parameters C3, C4, C6, and C7 to ensure they are appropriately separated and within valid ranges.

Browse all codes in this manual (55)
Verified technical data. Last updated: April 2026

Related Faults

CFContinuous operation during communication faultDIPDuplicate IP addressE.1Option Fault / Internal Contact Failure
Source: Mitsubishi FR-E800 Variable Frequency Drive
View Official PDFSearch more codes in this manual