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#1
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AC condensing unit problem
While replacing thermostat I have shorted out control transformer on
my AC system. I have split system and I already replaced the 24V transformer for the fan (the unit an the attic) and got it to work. However, the condensing unit is still not working. Here is a picture of the electric parts on the unit: http://e-pixel.net/AC_condensing_unit.jpg I have power 220V coming into the unit and I have 24V now coming to the unit from the attic fan. I was trying to follow the 24V on the condensing unit but it goes inside the coil to the bottom (labeled on the picture) and I can't find 24V anywhere on the unit. I checked every other wire with the brown 24V wire and I don't have 24V anywhere. Can someone help me out here. What's inside the unit where the blue 24V goes to? What else could be damaged here? Thanks in advanced for all your help, Jack |
#2
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AC condensing unit problem
JackpipE wrote:
While replacing thermostat I have shorted out control transformer on my AC system. I have split system and I already replaced the 24V transformer for the fan (the unit an the attic) and got it to work. However, the condensing unit is still not working. Here is a picture of the electric parts on the unit: http://e-pixel.net/AC_condensing_unit.jpg I have power 220V coming into the unit and I have 24V now coming to the unit from the attic fan. I was trying to follow the 24V on the condensing unit but it goes inside the coil to the bottom (labeled on the picture) and I can't find 24V anywhere on the unit. I checked every other wire with the brown 24V wire and I don't have 24V anywhere. Can someone help me out here. What's inside the unit where the blue 24V goes to? What else could be damaged here? Thanks in advanced for all your help, Jack You have a CARRIER 38ED high eff. from the 80's. The electronic board is a "anti short - cycle" timer. Remove it from the circuit. Your unit will light if you have 24 v from the two wires coming in. You'll have to 'by-pass' the c.b. Good luck. -- Zyp |
#3
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AC condensing unit problem
Be a good idea to replace the delay timer, of course.
-- Christopher A. Young Learn more about Jesus www.lds.org .. "Zyp" wrote in message ... JackpipE wrote: While replacing thermostat I have shorted out control transformer on my AC system. I have split system and I already replaced the 24V transformer for the fan (the unit an the attic) and got it to work. However, the condensing unit is still not working. Here is a picture of the electric parts on the unit: http://e-pixel.net/AC_condensing_unit.jpg I have power 220V coming into the unit and I have 24V now coming to the unit from the attic fan. I was trying to follow the 24V on the condensing unit but it goes inside the coil to the bottom (labeled on the picture) and I can't find 24V anywhere on the unit. I checked every other wire with the brown 24V wire and I don't have 24V anywhere. Can someone help me out here. What's inside the unit where the blue 24V goes to? What else could be damaged here? Thanks in advanced for all your help, Jack You have a CARRIER 38ED high eff. from the 80's. The electronic board is a "anti short - cycle" timer. Remove it from the circuit. Your unit will light if you have 24 v from the two wires coming in. You'll have to 'by-pass' the c.b. Good luck. -- Zyp |
#4
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AC condensing unit problem
Yes, it's a CARRIER high eff. from 85'.
So is it the delay timer (electronic board) that got shorted out ? I would rather replace whatever I damaged than try to remove it from the circuit and damaged something else. You have a CARRIER 38ED high eff. from the 80's. *The electronic board is a "anti short - cycle" timer. *Remove it from the circuit. * Your unit will light if you have 24 v from the two wires coming in. *You'll have to 'by-pass' the c.b. *Good luck. Be a good idea to replace the delay timer, of course. |
#5
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AC condensing unit problem
On Jun 17, 11:59*pm, JackpipE wrote:
Yes, it's a CARRIER high eff. from 85'. So is it the delay timer (electronic board) that got shorted out ? I would rather replace whatever I damaged than try to remove it from the circuit and damaged something else. You have a CARRIER 38ED high eff. from the 80's. *The electronic board is a "anti short - cycle" timer. *Remove it from the circuit. * Your unit will light if you have 24 v from the two wires coming in. *You'll have to 'by-pass' the c.b. *Good luck. Be a good idea to replace the delay timer, of course.- Hide quoted text - - Show quoted text - Do you have power coming back from your thermostat when the unit is calling for air? I would check for voltage at the stat and from the stat first. If you have an electronic stat you could have blown the stat board. Do you have heat? |
#6
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AC condensing unit problem
On Jun 17, 10:51*pm, "Zyp" wrote:
JackpipE wrote: While replacing thermostat I have shorted out control transformer on my AC system. I have split system and I already replaced the 24V transformer for the fan (the unit an the attic) and got it to work. However, the condensing unit is still not working. Here is a picture of the electric parts on the unit: http://e-pixel.net/AC_condensing_unit.jpgI have power 220V coming into the unit and I have 24V now coming to the unit from the attic fan. I was trying to follow the 24V on the condensing unit but it goes inside the coil to the bottom (labeled on the picture) and I can't find 24V anywhere on the unit. I checked every other wire with the brown 24V wire and I don't have 24V anywhere. Can someone help me out here. What's inside the unit where the blue 24V goes to? What else could be damaged here? Thanks in advanced for all your help, Jack You have a CARRIER 38ED high eff. from the 80's. *The electronic board is a "anti short - cycle" timer. *Remove it from the circuit. * Your unit will light if you have 24 v from the two wires coming in. *You'll have to 'by-pass' the c.b. *Good luck. -- Zyp- Hide quoted text - - Show quoted text - My thermostat has a built in "anti cycle" feature, in that it will not allow less than 5 minutes between compressor cycles. I don't know if that board does the same thing, but just figured I let you know in case the board is bad, you can use the T-stat as a substitute. |
#7
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AC condensing unit problem
Mikepier wrote:
On Jun 17, 10:51 pm, "Zyp" wrote: JackpipE wrote: While replacing thermostat I have shorted out control transformer on my AC system. I have split system and I already replaced the 24V transformer for the fan (the unit an the attic) and got it to work. However, the condensing unit is still not working. Here is a picture of the electric parts on the unit: http://e-pixel.net/AC_condensing_unit.jpgI have power 220V coming into the unit and I have 24V now coming to the unit from the attic fan. I was trying to follow the 24V on the condensing unit but it goes inside the coil to the bottom (labeled on the picture) and I can't find 24V anywhere on the unit. I checked every other wire with the brown 24V wire and I don't have 24V anywhere. Can someone help me out here. What's inside the unit where the blue 24V goes to? What else could be damaged here? Thanks in advanced for all your help, Jack You have a CARRIER 38ED high eff. from the 80's. The electronic board is a "anti short - cycle" timer. Remove it from the circuit. Your unit will light if you have 24 v from the two wires coming in. You'll have to 'by-pass' the c.b. Good luck. -- Zyp- Hide quoted text - - Show quoted text - My thermostat has a built in "anti cycle" feature, in that it will not allow less than 5 minutes between compressor cycles. I don't know if that board does the same thing, but just figured I let you know in case the board is bad, you can use the T-stat as a substitute. SOLID-STATE TIME GUARD II CIRCUIT, protects unit compressor by preventing short cycling. Time Guard II circuit provides a 5 ± 2minute delay before restarting compressor after shutdown for any reason. On normal start-up, the 5minute delay occurs before thermostat closes. After thermostat closes, the Time Guard II circuit then provides a 3-second delay to prevent contactor chattering. -- Moe Jones http://www.MoeJones.info |
#8
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AC condensing unit problem
Do you have power coming back from your thermostat when the unit is
calling for air? I would check for voltage at the stat and from the stat first. If you have an electronic stat you could have blown the stat board. Do you have heat? Yes I do have heat because I already replaced the transformer on the furnace that I also have blown. Yes, I do have voltage on the thermostat. From the attic unit (fan) there is 24V going to the thermostat. 3 wires white, red and green connecting to RC, G and Y on the thermostat. There are 24V on the thermostat. 2 wires 24V go to the condensing unit. I do have the 24V on the condensing unit at the end of the wire, but I can't find the voltage on the electronic board or any other wire on the condensing unit as I described in the first message opening this discussion. I appreciate all your help but most of what you say sounds Chinese to me. Is there an easy way I can test what's wrong with my condensing unit? Can someone say with high confidence that it's the electronic board could have blown ? Thanks, Jack |
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