Outdoor unit abnormal - Indoor lamp stays ON for 3 seconds without beep

What does Indoor lamp ON 3s (no beep) mean?

Before any blinking, the upper lamp on the indoor unit stays ON for 3 seconds without emitting a beep. This indicates an abnormality within the outdoor unit. Further steps are needed to determine the specific fault.

• General outdoor unit malfunction

Click steps to track your progress.

1. 1

   Turn off the power supply to the air conditioner from the main breaker.

2. 2

   Wait at least 30 seconds, then turn the power supply back on.

3. 3

   If the problem persists, set up the failure mode recall function on the remote controller to identify the specific error pattern.

4. 4

   Proceed to check the detailed outdoor unit failure mode recall function (refer to section 12-2.2 in the manual).

5. 5

   If the issue remains unresolved, contact a qualified service technician for further diagnosis and repair.