The Proper Startup Procedure for the GREE GMV6 ULTRA

In this HVAC tech tip video, Greg explains the proper startup procedure for the GREE GMV6 Ultra unit. Unlike its predecessor, the GMV5 Ultra, this unit requires a debug process. Greg walks through the system startup step-by-step, including checking power, ensuring proper D1 and D2 communication wiring, and confirming the debug start using the red buttons on the unit. He details the importance of compressor warm-up times based on ambient temperatures and explains how the machine self-addresses indoor units, highlighting the significance of identifying the master unit. Greg also covers additional steps such as adding charge during the debug process and final setup.