204

TagID Data Read Failed

Fronius · Perfect Charging

What does 204 mean?

The charger was unable to successfully read data from the TagID module, even if a basic communication link might be established. This indicates an issue with data integrity or access within the TagID.

Common Causes

  • Corrupted data within the TagID module's memory, making it unreadable.
  • Intermittent communication issues on the CAN bus, leading to incomplete or erroneous data transfers.
  • A faulty TagID module memory or processing unit.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Attempt to re-establish communication with the TagID module by power cycling the battery or charger.

  2. 2

    Inspect the CAN bus for signs of electrical noise or interference that could corrupt data.

  3. 3

    If the problem persists, the TagID module may be defective and require replacement.

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Verified technical data. Last updated: March 2026

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