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Old 01-24-2010, 04:04 PM   #1
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Trane XE 1500 burnt wire and wiring questions


First time poster, and thanks for allowing me on.

I have a Trane XE 1500. The fan unit outside stopped working. Breaker would not reset. I left the door open and reset the breaker only to hear loud popping noise. I took the fan off and the velcro lined bag over the compressor and found this:



It sparks to hell and pops so I just left the breaker off and disconnected it outside. I can't tell why it burnt in half? (if it did) or where it belongs. It is a hot wire.

Here is what the wiring looks like on the compressor. I can't see where that dangling hot wire could go?



My fan fell and I assume this red wire got yanked out.. but I don't know where it goes?





Sorry the pics are so big.... And thank you all very much if you could help an ignorant person out.

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Old 01-24-2010, 04:42 PM   #2
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Trane XE 1500 burnt wire and wiring questions


The burnt wire is supposed to go to an internal crank case heater. Follow those wires up to the contactor and disconnect them for now. Can buy a wrap around crank case heater tomorrow.
The red wire is just an unused motor speed so don't worry about it.

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Old 01-24-2010, 08:31 PM   #3
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Trane XE 1500 burnt wire and wiring questions


Parkam,
you didn't find an electrocuted mouse in there did you? This happened to my mothers' ac unit two years in a row. The mouse got in and chewed on the wires. The first time it was able to be repaired and everything worked fine. Last summer, the mouse got back in and this time shorted out the wires and somehow fried the compressor. We had to replace the whole unit. You should have seen the look on the mouse's face. The new unit is sealed up much better in relation to mice intrusion.
Mike Hawkins
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Old 01-24-2010, 08:33 PM   #4
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Trane XE 1500 burnt wire and wiring questions


I am guessing that this mouse "look" was on a dead mouse firehawkmph?
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Old 01-24-2010, 09:32 PM   #5
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Trane XE 1500 burnt wire and wiring questions


Thanks for the replies everyone. Nope. Didn't see a mouse.

I'm just wondering what I'm supposed to do now? Crank case heater? Heat's not working at the moment, but tied the wire off and of course I can reset the breaker now. (although the fan won't come on)

Edit: I'm looking for what a crankcase heater looks like.. Does it almost look like the big capacitor? Here's what I found:
http://www.directindustry.com/prod/e...21-372198.html

I see.. you said internal heater.

Last edited by parkham; 01-24-2010 at 09:47 PM.
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Old 01-24-2010, 09:50 PM   #6
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Trane XE 1500 burnt wire and wiring questions


The top picture in your link is a crank case heater. The bottom picture is the heater wrapped around compressors.

The compressor and fan should work even without the CC heater so there's something more wrong. Is that black wire in the compressor burnt in half? Pic gets a little fuzzy right there and I can't tell.
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Old 01-24-2010, 09:59 PM   #7
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Trane XE 1500 burnt wire and wiring questions


That wire appeared burnt. It was just laying on the bottom of the housing when I opened it up. I'm still confused as to where it is 'supposed' to be connected.
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Old 01-24-2010, 09:59 PM   #8
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Trane XE 1500 burnt wire and wiring questions


Think I was wrong on the red wire being extra. What does the little red wire laying on top of the circuit board go to? If it's loose check the wiring diagram to be sure but it probably hooks up to the other red fan motor wire.
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Old 01-24-2010, 10:04 PM   #9
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Trane XE 1500 burnt wire and wiring questions


I'll need to go check again.. but I didn't see any wires disconnected that the red wire could be connected to...which led to my confusion. Thanks for looking into this thread..appreciate it.
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Old 01-25-2010, 09:37 AM   #10
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Trane XE 1500 burnt wire and wiring questions


My 1200 series Trane has the crankcase heater external to the compressor. It sits in a tube near the bottom of the compressor housing. Mine shorted out a few years ago and I was able to buy a replacement, slip it back in the sleeve and all was good. The CC heater is a bit difficult to see as it sits under that box near the bottom of the compressor. Check to see if your's is external as well.
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Old 01-25-2010, 08:01 PM   #11
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Trane XE 1500 burnt wire and wiring questions


All is good. Thanks for the help everyone. Marty: that red wire is indeed unused.


Last edited by parkham; 01-25-2010 at 08:26 PM.
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