Outdoor Board LED1 (green) blinks twice and LED2 (red) blinks four times alternately - Miswiring of indoor/outdoor unit connecting wire, excessive number of indoor units

What does E9 mean?

During startup or operation, the outdoor unit's LED1 (green) blinks twice and LED2 (red) blinks four times alternately, indicating incorrect wiring of the indoor/outdoor unit connecting wire or too many indoor units connected (4 or more).

• Miswiring of indoor/outdoor unit connecting wire (converse wiring or disconnection).
• Excessive number of indoor units (4 units or more) connected to the outdoor unit.

Click steps to track your progress.

1. 1

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

2. 2

   Verify that the number of indoor units connected does not exceed the system's capacity.

3. 3

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