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Old 04-14-2009, 08:44 PM   #16
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Can't get unit to turn on need electrical help please-wiring diagram included


This is a 115 volt system with a minimum ampacity requirement of 14 amps, and the overcurrent protection (circuit breaker) is required to be a maximum of 20 amps.

So, you need 14-2 wire from the panel to the condensing unit, and a single-pole 20 amp circuit breaker.

Without having read each post on this thread, the 4 wires going from the outside CU to the indoor air handler are for control wiring. They may, or may not be 115 volts.

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Old 04-14-2009, 09:32 PM   #17
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Can't get unit to turn on need electrical help please-wiring diagram included


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Originally Posted by Magnettica View Post
This is a 115 volt system with a minimum ampacity requirement of 14 amps, and the overcurrent protection (circuit breaker) is required to be a maximum of 20 amps.

So, you need 14-2 wire from the panel to the condensing unit, and a single-pole 20 amp circuit breaker.

Without having read each post on this thread, the 4 wires going from the outside CU to the indoor air handler are for control wiring. They may, or may not be 115 volts.
You want 12 g with 20A breaker.
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Old 04-14-2009, 10:33 PM   #18
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Can't get unit to turn on need electrical help please-wiring diagram included


You fried the unit if you hooked it up to 220volts. Its a 110volt system.... Sorry
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Old 04-14-2009, 10:44 PM   #19
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Can't get unit to turn on need electrical help please-wiring diagram included


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Originally Posted by Leah Frances View Post
You want 12 g with 20A breaker.
Minimum ampacity is 14A, so 14ga wire is appropriate. Max overcurrent protection is 20A, so 20A breaker is appropriate. HVAC units play by different rules.

To the OP.... can you return the unit as "defective out of the box"?
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Old 04-14-2009, 10:54 PM   #20
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Can't get unit to turn on need electrical help please-wiring diagram included


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Originally Posted by dSilanskas View Post
You fried the unit if you hooked it up to 220volts. Its a 110volt system.... Sorry
I tend agree.
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Old 04-14-2009, 11:22 PM   #21
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Can't get unit to turn on need electrical help please-wiring diagram included


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Originally Posted by HouseHelper View Post
Minimum ampacity is 14A, so 14ga wire is appropriate. Max overcurrent protection is 20A, so 20A breaker is appropriate. HVAC units play by different rules.

To the OP.... can you return the unit as "defective out of the box"?
I will see tomorrow about being able to return the item. How "fried" is "fried"? I have access to the circuit board on the indoor unit and the 6.3 fuse is blown from what I can see. Would replacing the fuse work?
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Old 04-14-2009, 11:25 PM   #22
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Can't get unit to turn on need electrical help please-wiring diagram included


It can't hurt to try and replace the fuse.
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Old 04-14-2009, 11:25 PM   #23
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Can't get unit to turn on need electrical help please-wiring diagram included


Possible you can try.
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Old 04-14-2009, 11:29 PM   #24
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Can't get unit to turn on need electrical help please-wiring diagram included


Will a AGC 2A work?
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Old 04-14-2009, 11:34 PM   #25
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Can't get unit to turn on need electrical help please-wiring diagram included


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Will a AGC 2A work?
Not long enough to see if it will run.
You need to replace the fuse with the same size and rating.
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Old 04-14-2009, 11:41 PM   #26
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Can't get unit to turn on need electrical help please-wiring diagram included


I will go to radio shack tomorrow and see if they have one. Anything else I should check out that could have possibly blown and could pick up at radio shack as well?

I really hope that this will fix it...
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Old 04-15-2009, 11:10 AM   #27
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Can't get unit to turn on need electrical help please-wiring diagram included


Ok, I went to the shack and bought a 6.3 fuse. Replaced the blown one in the indoor unit, turned breaker on, it beeps and blows at the same time.

Is there anything specifically that would cause this? Here is a link, both wiring diagrams are here for indoor and outdoor unit:http://www.ajmadison.com/ajmadison/i...lessManual.pdf

Is this thing shot? Am I just wasting my time? Or is this thing fixable?
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Old 04-15-2009, 12:40 PM   #28
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Can't get unit to turn on need electrical help please-wiring diagram included


Reading the diagram power enters the unit circuitry at the outdoor unit on the black wire connected to L. A brown jumper then connects L to L1 taking power to the indoor unit on the black wire. This gets power to the stepping motor, indoor unit fan motor and low voltage transformer.. When the unit powers up the NO switch at the indoor unit closes sending power over the red wire to power the outdoor unit compressor and condenser fan. The 6.3 amp fuse protects the stepping motor and indoor unit fan. The circuit breaker protects the outdoor unit along with the internal overload of the compressor. If the 6.3 amp fuse blows you have no low voltage control because the transformer cannot get power. Nor can the stepping motor and fan motor of the indoor unit run. Without control voltage I doubt the outdoor unit can operate on call for heat or cool because the NO switch probably closes on low voltage control.

So my guess is you likely need to see about what to do in returning the damaged unit. If you are responsible for overpowering the unit by connecting to 240 volts you are going to have to fess up the responsibility for damaging the unit IMO. This likely will require purchasing a new one. Live and learn. Connecting a 120 volt unit to 240 volts when it was obvious being wired to a double pole breaker would tell me that you should not have been attempting the electrical part of this install. I don't mean that in a insulting manner but it was a fundamental mistake. Just how I see things.
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Old 04-15-2009, 12:48 PM   #29
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Can't get unit to turn on need electrical help please-wiring diagram included


Stubbie, Well Said, Good Analysis
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Old 04-15-2009, 03:17 PM   #30
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Quote:
Originally Posted by Stubbie View Post
Reading the diagram power enters the unit circuitry at the outdoor unit on the black wire connected to L. A brown jumper then connects L to L1 taking power to the indoor unit on the black wire. This gets power to the stepping motor, indoor unit fan motor and low voltage transformer.. When the unit powers up the NO switch at the indoor unit closes sending power over the red wire to power the outdoor unit compressor and condenser fan. The 6.3 amp fuse protects the stepping motor and indoor unit fan. The circuit breaker protects the outdoor unit along with the internal overload of the compressor. If the 6.3 amp fuse blows you have no low voltage control because the transformer cannot get power. Nor can the stepping motor and fan motor of the indoor unit run. Without control voltage I doubt the outdoor unit can operate on call for heat or cool because the NO switch probably closes on low voltage control.

So my guess is you likely need to see about what to do in returning the damaged unit. If you are responsible for overpowering the unit by connecting to 240 volts you are going to have to fess up the responsibility for damaging the unit IMO. This likely will require purchasing a new one. Live and learn. Connecting a 120 volt unit to 240 volts when it was obvious being wired to a double pole breaker would tell me that you should not have been attempting the electrical part of this install. I don't mean that in a insulting manner but it was a fundamental mistake. Just how I see things.
Thanks for taking the time out to help me further understand whats going on with this unit. Also no affense taken, I assume all responsibility. I made the error of thinking that this compressor would easliy take the place of the one I was replacing.

Since hooking it up to the 240 volts blew the unit(s), does this mean that it just blew the circuit breaker (outdoor) as well as the 6.3 fuse (indoor)? Or does this mean that pretty much all electrical components on both units are shot? It seems to me that I should be able to just replace the circuit breaker and fuse, for that is what they are there for right?

I would hope that atleast one if not both, either outdoor or indoor unit is salvagable for the simple fact that this was an expensive purchase and hopefully I can save some money from the error I made.

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