E441 (Red ON, Green Blink, Yellow OFF) — Cooling operation unavailable due to low outdoor temperature

What does E441 mean?

The outdoor unit's PCB LED displays E441 when cooling operation is not available because the outdoor air temperature is lower than -5°C (23°F). This is a normal operational limit, not a fault.

• Outdoor ambient temperature falling below the system's operational limit for cooling mode

Click steps to track your progress.

1. 1

   No direct user action is required for the unit itself; this is an operational safeguard.

2. 2

   Wait for the outdoor temperature to rise above -5°C (23°F) to resume cooling operation.

3. 3

   Ensure the outdoor unit is not obstructed by snow or ice in cold weather conditions.