Outdoor Board LED green (once) and red (twice) blink alternately after startup - Outdoor unit's protection device connector is open

What does F3, F5, F9 mean?

After the initial 'startup' sequence, if the outdoor unit's LED1 (green) blinks once and LED2 (red) blinks twice alternately, it indicates that a protection device connector on the outdoor unit is open.

• Outdoor unit's protection device connector is open.

Click steps to track your progress.

1. 1

   Turn off the main power supply to the unit.

2. 2

   Inspect the outdoor unit's protection device connectors and ensure they are securely connected.

3. 3

   Restore power and re-check the display.