E30
Atlantic Communication Module Fault

Atlantic water heater with Wi-Fi or smart control shows E30; remote control via app fails.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Defective Wi-Fi / RF module, loose communication connector, incompatible module firmware, control board communication port failure

How to Fix / Troubleshooting

Safety: Disconnect power before accessing internal modules.

  • Locate the communication module (Wi-Fi or RF) usually plugged into the main control board.
  • Unplug and reinsert the module to ensure a good connection.
  • Check the module's antenna cable (if external) for damage.
  • Update the app and verify router settings; ensure the heater is within Wi-Fi range.
  • If E30 remains and local control works normally, replace the communication module with the correct Atlantic accessory.
  • If a new module does not resolve the error, the control board communication port may be defective and the board should be replaced.
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Repair Difficulty

Medium 3/5

Required Part

Wi-Fi / Communication Module
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