F3 - Outdoor Ambient Temperature Sensor Error

What does F3 mean?

An F3 error indicates a problem with the outdoor ambient temperature sensor. The system cannot get a valid reading from this sensor, which is necessary for proper operation. The ODU main board LED will show this error.

• Poor contact between the ambient temperature sensor and the main board terminal
• Ambient temperature sensor is abnormal
• Detecting circuit is abnormal

Click steps to track your progress.

1. 1

   Check if the outdoor ambient temperature sensor is correctly inserted into the main board socket.

2. 2

   Inspect the terminal connection between the main board and the sensor for looseness or foreign objects. Tighten or clean if necessary.

3. 3

   Disconnect the sensor and measure its resistance (refer to Appendix 1 for temperature-resistance relation).

4. 4

   Replace the ambient temperature sensor if it is abnormal.

5. 5

   Inspect the detecting circuit for any issues.

6. 6

   Replace the outdoor main board if the error continues.