ER0

SD Memory Card Access Error (OS Installation)

Mitsubishi Electric · MELSEC iQ-R Motion Controller

What does ER0 mean?

This error occurs during operating system software installation from an SD memory card, indicating an access failure to the card. The system cannot read the installation files, halting the process.

Common Causes

  • Faulty SD memory card used for OS installation
  • Incompatible or corrupted SD memory card

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Exchange the SD memory card.

  2. 2

    Reinstall the operating system software with the new SD memory card.

Browse all codes in this manual (19)
Verified technical data. Last updated: March 2026

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Source: Mitsubishi Electric MELSEC iQ-R Motion Controller