E403 - Compressor stopped due to freeze protection

What does E403 mean?

The compressor has stopped operating to prevent freezing of the outdoor condenser, indicating a potential issue with refrigerant levels or airflow.

• Freeze protection control activation.
• Outdoor condenser issue.
• Fan and motor operation issues.
• Indoor unit heat exchanger sensor or inlet blockage.

Click steps to track your progress.

1. 1

   Check the outdoor condenser for ice buildup.

2. 2

   Verify whether the outdoor fan and motor operate normally.

3. 3

   Check the indoor unit heat exchanger temperature sensor and for inlet blockage.

4. 4

   Confirm the operation of the Electronic Expansion Valve (EEV).