Ceramic capacitor in air conditioner DPAC12010H
I received a not-working air conditioner model DPAC12010H from someone who didn't need it anymore, and I took it to a friend who works with refrigerators to see if we could find the problem.
We took it apart, and we found that a fuse mounted on the main PCB was shot. The fuse is 120V and 3.75A so I suppose it's only for the control circuit as the whole air conditioner runs at more than 9A on max capacity.
Anyway, we temporarily bypassed the fuse with a copper wire to continue testing. We plugged it in, and immediately a component on the PCB (which I now believe is a ceramic capacitor) spew sparks and melted it's insulation. However after this incident the air conditioner works perfectly, and it blows very cool air (its a 12000 BTU machine after all).
However I'm still concerned about that capacitor. I can not post a picture right now, maybe when I get back from work. It was brownish yellow, about 3/4" in diameter roughly same shape as a nickel. Does anyone have any idea what that capacitor might be for? Since the air conditioner is working now I'm guessing the sparks made it conductive, or maybe it's used for the dehumidifier which I have not tested.
I will buy a new fuse today and see what happens.
The air conditioner draws about 9 A at full operation.
Any help would be greatly appreciated.