Red Off, Green 2 Flashes (Single System) — Reverse Communication Failure at Startup

What does Red Off, Green 2 Flashes mean?

The green LED light on the indoor unit flashes two times while the red LED is off. This indicates that the reverse communication between the indoor and outdoor units failed when the system first started up.

• Issue with the interconnecting wiring between units.
• Electrical interference disrupting communication signals.
• Faulty communication board in either the indoor or outdoor unit.

Click steps to track your progress.

1. 1

   Turn off the air conditioner at the main power supply (circuit breaker).

2. 2

   Wait for at least 30 seconds, then restore power to the unit.

3. 3

   Visually inspect the interconnecting wiring for any loose connections or visible damage.

4. 4

   If the issue persists, contact a qualified HVAC technician for diagnosis.