F906

Intermediate CPU Error

Mitsubishi Electric · MELSEC Q-series MELSECNET/H

What does F906 mean?

An error has been detected within the intermediate CPU module of the system. This indicates a hardware or firmware issue with this specific CPU.

Common Causes

  • Fault or malfunction within the intermediate CPU

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the intermediate CPU for any diagnostic indicators, error messages, or signs of malfunction

Browse all codes in this manual (60)
Verified technical data. Last updated: March 2026

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F10CControl Station Duplication ErrorF108Baton Pass Error (Baton Duplicated)F114Send Failure (Recurring)
Source: Mitsubishi Electric MELSEC Q-series MELSECNET/H
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