OPERATION INDICATOR lamp 3-second ON then blinks at 0.5-second interval — Outdoor unit is abnormal

What does OPERATION INDICATOR lamp 3-second ON then blinks at 0.5-second interval mean?

The left lamp of the OPERATION INDICATOR on the indoor unit stays ON for 3 seconds (without a beep) before starting to blink at 0.5-second intervals. This specific pattern indicates an abnormality in the outdoor unit.

• Abnormality detected in the outdoor unit.
• An abnormal condition has occurred and is memorized in the system.

Click steps to track your progress.

1. 1

   Note the blinking pattern of the OPERATION INDICATOR lamp.

2. 2

   Refer to the outdoor unit failure mode recall function table (in the outdoor unit service manual) to identify the specific abnormal point.

3. 3

   Ensure to check at least 2 consecutive blinking cycles to accurately identify the pattern.