4-time blink 2.5 seconds OFF — Fin/P.C. board temperature overheat protection

What does 4-time blink 2.5 seconds OFF mean?

The outdoor unit LED blinks 4 times with a 2.5-second pause. This means the fin temperature thermistor on the heat sink or the P.C. board temperature thermistor on the inverter P.C. board has exceeded its safe operating temperature (e.g., 75-86°C).

• Outdoor unit airflow obstruction
• Poor air circulation around the outdoor unit
• Outdoor fan motor malfunction

Click steps to track your progress.

1. 1

   Clear any obstructions around the outdoor unit (leaves, dirt, plants, etc.) to ensure proper airflow.

2. 2

   Check that the outdoor unit's air passage is clear and not restricted.

3. 3

   Power cycle the unit by turning off the breaker for a few minutes before restarting.

4. 4

   If the problem persists, a qualified technician should check the outdoor fan motor for proper operation.