Bleed the air and humidity through the refrigerant circuit. Take out the caps with the 2-way and 3-way valves and through the assistance port and connect a vacuum pump hose for the assistance port. Look at the electrical wiring from the outside unit. Take out the duvet within the condenser. https://air-conditioning-installa54308.tokka-blog.com/26755361/air-conditioning-installation-north-west-an-overview