Bleed the air and humidity from your refrigerant circuit. Clear away the caps in the 2-way and three-way valves and with the provider port and connect a vacuum pump hose to your services port. Installation for these methods can be more complex than others, so always refer to company Guidance https://air-conditioning-servicin65307.suomiblog.com/not-known-details-about-air-conditioning-installation-north-west-42017757