MAC-558/559 LED 1 flashes 0.5 sec, LED 2 solid ON, LED 3 flashes 5 sec — Server comm failed, Heat Pump comm connected

What does MAC-558/559 LED 1 0.5 sec interval, LED 2 ON, LED 3 once every 5 sec mean?

On MAC-558/559 models, a rapid flash of LED 1 (0.5 seconds) with LED 2 solid ON and LED 3 flashing slowly (5 seconds) means that communication between the Wi-Fi interface and the server has failed, but communication with the Heat Pump is established.

• Issue with internet connectivity beyond the local network (e.g., router cannot reach Mitsubishi Electric server).
• Server-side issues with the Mitsubishi Electric Wi-Fi Control service.
• Firewall or network restrictions blocking communication to the server.

Click steps to track your progress.

1. 1

   Check your home internet connection to ensure it is working correctly.

2. 2

   Verify that the Mitsubishi Electric Wi-Fi Control service is not experiencing outages (check their website or support channels).

3. 3

   Restart your home router and Wi-Fi interface.

4. 4

   Check your router's firewall settings to ensure they are not blocking outbound connections to the Mitsubishi Electric server.