E15
Walli Internal Wi‑Fi / Communication Module Fault

Walli charger displays E15; app shows 'Wi‑Fi module error' or 'Network module fault'.

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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

Failed Walli Wi‑Fi module, Loose internal communication ribbon cable, Corrupted firmware on communication module, Excessive EMI from nearby devices

How to Fix / Troubleshooting

Safety first: Network faults do not usually affect electrical safety, but always power down before opening the unit.

Steps:

  • Reboot the charger: Turn off the breaker for 2–3 minutes, then restore power and wait for the Wi‑Fi LED to stabilize.
  • Check signal strength: Ensure the Walli charger is within range of the router and that the router is functioning normally.
  • Firmware update/reset: Using the Walli app (if still reachable) or service interface, attempt a network module reset or firmware update.
  • Internal check: With power off, open the housing and locate the Wi‑Fi/communication module (often a small daughterboard). Verify its connector or ribbon cable is fully seated.
  • Replace module: If the module does not power up or is not detected after checks, replace the Walli Wi‑Fi/communication module with an approved spare.
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Repair Difficulty

Medium 3/5

Required Part

Walli Wi‑Fi module
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