Mitsubishi Electric · Wi-Fi Interfaces
On MAC-558/559 models, if LED 2 is solid ON and LED 3 flashes slowly (every 5 seconds) while LED 1 is off, it signifies that communication with the access point (your home Wi-Fi) has failed, but communication with the Heat Pump is still intact.
Click steps to track your progress.
Check your home Wi-Fi router to ensure it is powered on and broadcasting a signal.
Verify that the Wi-Fi password for your home network has not changed.
Attempt to re-pair the Wi-Fi interface to your home network using either WPS or Access Point mode.
Ensure the Wi-Fi interface is within range of your router.