E221 - Outdoor temperature sensor error (Short or Open)

What does E221 mean?

The outdoor temperature sensor has a short or open circuit, leading to inaccurate readings and potential operational issues.

• Outdoor sensor Open/Short.
• Faulty temperature sensor connector.

Click steps to track your progress.

1. 1

   Turn off the unit's power.

2. 2

   Check the connection of the outdoor temperature sensor connector.

3. 3

   Verify the sensor's resistance value to ensure it's within the normal range (refer to manual's table).

4. 4

   Reconnect the temperature sensor connector securely and power on the unit.