Red Off, Green 3 Flashes (Single System) — Reverse Communication Failure In Use

What does Red Off, Green 3 Flashes mean?

The green LED light on the indoor unit flashes three times while the red LED is off. This indicates a failure in the reverse communication between the indoor and outdoor units during normal operation.

• Intermittent fault in the interconnecting wiring.
• Temporary electrical interference.
• Communication error within the control boards.

Click steps to track your progress.

1. 1

   Power cycle the air conditioner by turning it off at the circuit breaker for 30 seconds, then turning it back on.

2. 2

   Ensure there are no new electronic devices or sources of interference near the unit.

3. 3

   Check for any loose connections on the communication wiring if accessible.

4. 4

   If the fault continues, professional technical assistance is required.