Red 5 Pulses, Green Blinks, Yellow Off (AUY, ABY & AWY) — Communication Error

What does Communication Error (AUY, ABY & AWY) mean?

The red LED shows 5 pulses, the green LED blinks, and the yellow LED is off. This indicates a general communication error between the indoor and outdoor units.

• Loose or damaged interconnecting wiring.
• Electrical interference disrupting signals.
• Communication board fault in either indoor or outdoor unit.

Click steps to track your progress.

1. 1

   Turn off the air conditioner at the main power supply.

2. 2

   Wait at least 30 seconds for a full system reset, then restore power.

3. 3

   Check interconnecting wiring for secure connections and signs of damage.

4. 4

   If the error persists, professional diagnostic help from an HVAC technician is recommended.