CoolMaster - HVAC Gree/GMV4 VRF installation guide

This article applies to the following CoolMaster products:

  • CoolMaster
  • CoolMasterPro 
  • CoolMasterNet


Please note that the article applies also to commissioning the following HVAC brands:
  • Lennox
  • Tica
  • Innovair 


  1. HVAC Communication Terminals
    HVAC outdoor connection

  2. Connecting to the line plug
    Secure the cables in the L7 line plug.

  3. Plugging to the CoolMaster
    Insert the plug in to the CoolMaster L7 socket.

  4. Check DIP Switches are set correctly
    Dip switches setup for VRF HVAC system on L7.

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