So i was doing annual cleaning on my Midea U 12kbtu window AC and decided to take it apart a bit more to see inverter/controller board and to try running it from DC power. I tried to power it from 120v 100ma benchtop supply and i got it to spin the indoor fan followed by power error displayed on temperature LED screen. I see there is power relay next to bulk capacitors. I have to figure out what its used for to make sure it does not break current under load which would fry it under DC supply. Nice to see passive 3mH PFC inductor inside but active PFC would have been ideal. My 800w inverter still hates this thing but will start it. EDIT: It works!




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