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
Attempt to re-establish communication with the TagID module by power cycling the battery or charger.
- 2
Inspect the CAN bus for signs of electrical noise or interference that could corrupt data.
- 3
If the problem persists, the TagID module may be defective and require replacement.
Verified technical data. Last updated: March 2026
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Source: Fronius Perfect Charging