Alfen Weak RFID Reader Performance

RFID cards are sometimes not detected unless held very close or at a specific angle.

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Possible Causes

RF interference from nearby equipment, Metal objects behind or around the charger affecting the antenna, Aging or damaged RFID antenna, Loose RFID module connection.

How to Fix / Troubleshooting

Safety first: Turn off power before accessing the RFID module.

  • Step 1 – Remove interference sources: Keep high-power RF devices (e.g., Wi-Fi routers, DECT phones) and large metal objects away from the immediate vicinity of the charger front.
  • Step 2 – Test multiple cards: Some cards have weaker antennas; test with another known-good card.
  • Step 3 – Reseat RFID module: With power OFF, reseat the RFID module and ensure it is correctly positioned behind the front panel.
  • Step 4 – Check mounting height: Ensure the charger is mounted at the recommended height so users can present cards flat to the reader.
  • Step 5 – Replace module if needed: Persistent weak reading suggests a failing RFID antenna or module.
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Repair Difficulty

Easy 2/5

Required Part

RFID Reader Module
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