Air conditioning units have a built-in system to detect errors in their functioning. Whenever a problem arises, the system generates an error code, which is displayed on the unit’s digital display or through flashing lights. The error code indicates the type of problem that the system is facing and helps the technician to diagnose and fix it. https://airconpros.com.sg/what-is-the-aircon-error-code-how-to-fix-it/