Massive Heat Wave, AC not working. - HELP
I have a Duo Therm roof AC unit. Yesterday morning it was blowing cold air, but sounded like the fan was laboring. Ultimately, fan stopped working altogether. Even with AC off and just switching fa...
Forum Discussion
I can see that White is Common to both Fan and Compressor.
Blue powers the Compressor on command of the control box.
For the Fan:
Black should the High Speed
Yellow is probably Medium Speed
Red is probably Low Speed and
Brown must be connected to the FAN capacitor or FAN terminal of a Dual Capacitor
The Common terminal of a Dual Run Cap has to be connected to White
If you have two Run Capacitors, THEN the the Common terminal of a Dual with one side (either Fan or Herm) unused MUST BE JUMPERED to the second terminal of the single replacement capacitor
For Compressor/HERM, that Capacitor lead (corresponding to Brown for the Fan) is RED. You'll see two Red leads on the HERM terminal and the second Red is for your Start Assist. Start Assist requires that PTCR, either built in or another Jumper, then back to Common, making (EDIT) FOUR wires on COM in the diagram. (EDIT) FIVE if you're jumpering to a single replacement capacitor. Since a Capacitor Terminal has but Four Lugs, you can use the terminal you jumpered to as a Common terminal for the extra wires. That'd be Four (with one of them a Jumper) on the Common terminal of the Dual Capacitor, and Two on one terminal of the new single capacitor. Both WHITE. Then Brown for FAN on the other.
Hopefully Doug or Chris can verify that I sent you the correct diagram. Your Model Number IS on the top page.
Red
Blue powers the Compressor on command of the control box.
For the Fan:
Black should the High Speed
Yellow is probably Medium Speed
Red is probably Low Speed and
Brown must be connected to the FAN capacitor or FAN terminal of a Dual Capacitor
The Common terminal of a Dual Run Cap has to be connected to White
If you have two Run Capacitors, THEN the the Common terminal of a Dual with one side (either Fan or Herm) unused MUST BE JUMPERED to the second terminal of the single replacement capacitor
For Compressor/HERM, that Capacitor lead (corresponding to Brown for the Fan) is RED. You'll see two Red leads on the HERM terminal and the second Red is for your Start Assist. Start Assist requires that PTCR, either built in or another Jumper, then back to Common, making (EDIT) FOUR wires on COM in the diagram. (EDIT) FIVE if you're jumpering to a single replacement capacitor. Since a Capacitor Terminal has but Four Lugs, you can use the terminal you jumpered to as a Common terminal for the extra wires. That'd be Four (with one of them a Jumper) on the Common terminal of the Dual Capacitor, and Two on one terminal of the new single capacitor. Both WHITE. Then Brown for FAN on the other.
Hopefully Doug or Chris can verify that I sent you the correct diagram. Your Model Number IS on the top page.
Red
