Red Blinking, Green Blinking (Single System) — PCB Failure

What does Red Blinking, Green Blinking mean?

Both the red and green LED lights on the indoor unit are blinking simultaneously. This typically indicates a failure of the main printed circuit board (PCB) within the indoor unit.

• Electrical surge or short circuit damaging the PCB.
• Component failure on the PCB.
• Age-related wear and tear of the circuit board.

Click steps to track your progress.

1. 1

   Turn off the air conditioner immediately at the main electrical breaker.

2. 2

   Wait for at least 5 minutes before attempting to restore power.

3. 3

   If the blinking persists, this confirms a PCB failure.

4. 4

   Contact a qualified HVAC technician for PCB replacement, as this is an internal component.