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

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

On MAC-558/559 models, a slow flash of LED 1 (every 5 seconds) combined with a rapid flash of LED 2 (every 0.5 seconds) means the Wi-Fi interface is successfully connected to the server and access point, but it cannot communicate with the Heat Pump unit.

• Issue with the physical connection between the Wi-Fi interface and the Heat Pump.
• Heat Pump is powered off or in a fault state.
• Incorrect wiring or installation of the Wi-Fi interface to the Heat Pump.

Click steps to track your progress.

1. 1

   Check the physical connection of the Wi-Fi interface to the indoor Heat Pump unit.

2. 2

   Ensure the Heat Pump unit is powered on and functioning correctly.

3. 3

   Verify the installation of the Wi-Fi interface according to the installation guide.

4. 4

   If the issue persists, contact an authorized service technician for inspection.