> [EMAIL PROTECTED] writes: > A ten year old 6000 btu Amana Quiet Cool window A/c in the shop quit > running > after I had smelled hot electronics for a short while. The circuit > boards, > the fan motor, and the wiring don't look smoked; but the condenser is so > rusty I wonder if it might be the cause of the smell. > The circuit diagram is illegible from exposure to rain, etc. The fan > motor > has three leads so I suspected it is a typical three speed motor setup > and > it was confirmed on the label but the label gave no color codes for the > wires. The compressor also has three leads and a (common?) lead comes in > through a separate thermal switch . > > The part I find confusing is a big capacitor which has three leads and a > rating of both 7.5 mfd and 35 mfd. From looking at the label on the > blower > motor, it doesn't appear to be a capacitor start or capacitor run motor, > so > I would guess that both the blower motor and the compressor use the > capacitor simply to give them a little more amperage when they start up > since they both start at once on some settings of the dial; but that's > just > a wild guess.
> Gerry, > I believe you will find that this is a RUN capacitor, dual rated with > the > lower rating going to the condenser fan motor, and the higher for the > compressor. The cooling fan does not require a capacitor. Look carefully > for > swelling, especially on the ends, and of course, leakage. A 10 year old > cap is > your likely your culprit, with my guess being the condenser fan > motor will not > run and is overheating, causing the smell. The condenser fan should spin > freely and being outdoors, can start to seize up over time. Oil might be > all you > need. > Both Johnstones and Graingers have good prices on these and will take cash > sales from individuals. > I would not screw with the controls as there are a lot of safety devices > and > interlocks. You don't want to set fire to your window, and all that is > attached! > Regards, > Jim Friesen > Phoenix AZ > 79 300SD, 264 K miles > 98 ML 320, 152 K miles ---------------------------------------------- Thanks, Jim. After further disassembly and cleaning off some of the crud, I found that the fan motor which runs both the evaporator and condenser fan has a label on the motor showing that it does need a capacitor in it's circuit. The motor turns freely but it smells so much like burnt wiring, I doubt it will run very long if at all. Think I'll junk this A/C and get a new one since the dual 7.5-35 mfd capacitors are scarce and pretty expensive on the internet. Would like to use the compressor (with a 35 mfd cap?) as a vacuum pump if it's still good. I would guess that the capacitor would be wired between two of the three terminals on the compressor, or would I be wrong? Gerry _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
