App shows CP_a019; Wall Connector LEDs flash an error; the unit cannot connect to Wi-Fi or cloud services.

Safety: Network issues do not affect basic electrical safety, but do not open the unit unless power is off.

• Check signal strength: Use a phone at the Wall Connector location to verify Wi‑Fi signal quality. If weak, move the router or add a Wi‑Fi extender.
• Re‑enter credentials: Use the commissioning interface to forget and rejoin the desired Wi‑Fi network, ensuring the password is correct.
• Router settings: Ensure the router is not blocking the Wall Connector's MAC address and that standard outbound ports are allowed.
• Firmware update: If the unit briefly connects, allow time for firmware updates to complete.
• If CP_a019 persists with good Wi‑Fi: The internal Wi‑Fi module may be defective; the logic board or entire Wall Connector may require replacement.