3 red flashes — Communication error between indoor and outdoor units

What does 3 red flashes mean?

The indoor unit's operation indicator lamp flashes red three times, indicating a communication error. This means the indoor unit cannot communicate with the outdoor unit.

• Wiring issue between units
• Signal interruption
• Faulty communication board

Click steps to track your progress.

1. 1

   Turn off the power supply to the unit, wait for 30 seconds, then turn it back on.

2. 2

   Check all wiring connections between the indoor and outdoor units.

3. 3

   Consult the service manual for detailed troubleshooting steps for communication errors.