Bleed the air and humidity through the refrigerant circuit. Take out the caps in the two-way and three-way valves and from the support port and hook up a vacuum pump hose into the services port. These types of units have distant controls to be able to conveniently switch them on https://zionxzxwt.rimmablog.com/26325323/an-unbiased-view-of-air-conditioning-installation