Outdoor Board LED1 (green) blinks twice and LED2 (red) blinks six times alternately - Indoor/outdoor unit communication error (transmitting error detected by indoor unit)

What does E0, E3 mean?

During startup or operation, the outdoor unit's LED1 (green) blinks twice and LED2 (red) blinks six times alternately, indicating an indoor/outdoor unit communication error, specifically a transmitting error detected by the indoor unit.

• Indoor/outdoor unit communication error (transmitting error).
• Noise entering into indoor/outdoor connecting wire or power supply.
• Faulty communication module.

Click steps to track your progress.

1. 1

   Check if the indoor/outdoor connecting wire is connected correctly.

2. 2

   Check if noise is entering into the indoor/outdoor connecting wire or power supply.

3. 3

   Re-check the error by turning off the main power, waiting, and turning it back on.