This article applies to the following CoolMaster products: CoolMaster CoolMasterPro CoolMasterNet HVAC Communication TerminalsHVAC outdoor connection Connecting to the line plugSecure the cables in the L7 line plug. Plugging to the CoolMasterInsert the plug in to the CoolMaster L7 socket. Check DIP Switches are set correctlyDip switches setup for VRF HVAC system on L7.