Mitsubishi Electric · Wi-Fi Interfaces
On MAC-558/559 models, if only LED 2 is solid ON and LED 1 and LED 3 are off, it indicates that communication with the access point (home Wi-Fi) has failed, and communication with the Heat Pump is currently in its startup phase.
Click steps to track your progress.
Check your home Wi-Fi router to ensure it is powered on and functioning.
Restart the Wi-Fi interface and allow time for it to attempt to connect.
Attempt to re-pair the Wi-Fi interface to your home network.
Ensure the Heat Pump unit is fully powered and ready.