MAC-558/559 LED 1 flashes 0.5 sec, LED 2 solid ON — Server/AP comm failed, Heat Pump comm starting up

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

On MAC-558/559 models, a rapid flash of LED 1 (0.5 seconds) with LED 2 solid ON and LED 3 OFF indicates that communication with both the server and the access point has failed, while communication with the Heat Pump is still in the startup phase.

• No connection to the home Wi-Fi network (access point).
• No connection to the Mitsubishi Electric server.
• Initial setup failure or recent loss of internet connectivity.

Click steps to track your progress.

1. 1

   Restart your home router and the Wi-Fi interface.

2. 2

   Verify your home Wi-Fi network is active and broadcasting a 2.4GHz signal.

3. 3

   Attempt to re-pair the Wi-Fi interface to your home network using either WPS or Access Point mode.

4. 4

   Check for any temporary internet outages with your service provider.