Left OPERATION INDICATOR lamp stays ON for 3 seconds without a beep, then blinks — Outdoor unit abnormality

What does 3s ON then blink (no beep) mean?

The indoor unit's left OPERATION INDICATOR lamp stays continuously lit for 3 seconds, without any accompanying beep, before it starts blinking. This specific pattern indicates an abnormality originating from the outdoor unit.

• An internal malfunction in the outdoor unit.

Click steps to track your progress.

1. 1

   Observe the lamp's behavior carefully: verify it stays ON for 3 seconds, then blinks, and no beep is heard.

2. 2

   Check for at least two complete cycles of the blinking pattern.

3. 3

   Refer to the outdoor unit service manual for the outdoor unit failure mode table to identify the specific fault.

4. 4

   Use the 'Failure Mode Recall Function' to retrieve memorized fault details for the outdoor unit.