Question about Heating & Cooling
My air conditioner blow a fuse on the main board. I found on the external unit the the transformer that supply 24vac to the relay that operate the blower and the compressor was dead. The primary of the trx was open. I install a new trx and replace the fuse. After about 5 minutes the fuse burn again and the primary of the trx was burn. So i decided to change the relay that is activated by the trx that receivew the power from the main board and also change the capacitor at the exxternal unit. During the replacement of the relay one of the wires got loose on the old relay and when i connected everything to the new relay i didnt know were that white wire goes so i connected to one of the ac inputs to the relay. I install a new fuuse to the main board and tried to turn on the console with the remote but the console wont turn on. I check the fuse and the fuse is fine. I think that the white wire is wrong installed because is an ac input to the main board. So i ask for a diagram of the board. Also the model and seria of the outside unit is Model: SCU10A24A-4A sn:8498F21102 Help me, thanks
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Posted on Jan 02, 2017
SOURCE: Air Conditioner malfunction
Hi, Sounds like you have a short in the control circuit to me. Turn off all power going to the unit. Write down or otherwise mark the wires leaving the control board going to the thermostat. Remove them from the control board. Replace the fuse. Turn power back on and see if the fan still runs. If it does, check and or replace the heat limit switch that brings the fan on during the heat cycle. It may just need adjusted. If the fuse blows, I would think that the control board is probably bad. If it doesn't blow, Remove the thermostat. Leaving all thermostat wires open check them with an Ohm meter. There should be no continuity between them. Twist all the wires together at one end and ohm them again at the other end. You should have complete continuity on all wires. If the wiring checks out, down power the unit. Double check your wire colors and rewire the control board. With all wires open at the thermostat, turn the power back on. Touch the RED wire to the YELLOW wire. The Condensing unit should come on. Touch the RED wire to the GREEN wire. The fan should come on. Touch the RED wire to the WHITE wire. The heat should come on. Down power the unit. Replace the thermostat. Test unit. If the fuse has lasted ok but blows now it is either wired wrong at the Thermostat or the thermostat is bad. I hope I have helped. NOTE: If you can not understand these instructions. Call a licensed Heating / Air conditioning company. kstfas
Posted on Sep 23, 2007
SOURCE: Wiring compressor
The two terminal cap is only for the new fan motor. Connect the compressor wire back where you found it, on the 3 terminal cap. It's the terminal marked, "herm". The "common" terminal on the 3 terminal cap must still be connected to one side of the 220 power at the contactor. One side of the 220 goes to the common on the compressor. The other side of the 220 goes to the run winding on the compressor AND the common terminal on the 3 terminal capacitor.
Posted on Jul 22, 2008
Purple should be on "C".
The fan motor may be destroyed now. Switch the wire and see if it keeps running or not.
Posted on Apr 28, 2009
Are the wires going to capacitor correct. You have two sides to the capacitor one side is compressor or herm as stated on top the fan. should have one wire only on fan side then two wires to the common side and one wire to herm side. trace out the wires I'm sure it's electrical and make sure you can see that it does in fact have a dual capacitor. Turn off all electrical supply before even touching this as you are around some big voltage. I do this everyday and I won't even get close unless I pull the safety disconnect on the side of the house. Get back to me and can help further. Ken
Posted on Aug 22, 2009
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