Operation LED blinks 3 times — Main relay error.

What does Operation 3 Times (No display) mean?

The outdoor unit is sending a signal even though the main relay is off, which indicates a problem with the main power relay.

• Defective main relay.
• The controller PCB is defective.

Click steps to track your progress.

1. 1

   Reset the power to the unit by turning it off at the circuit breaker, waiting 30 seconds, then turning it back on.

2. 2

   Listen for any unusual sounds or observe the unit's behavior after resetting.

3. 3

   If the error reappears, professional service is needed to check the main relay or controller PCB.