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HVAC: Shorted compressor
Posted on 9/14/21 at 1:57 pm
Posted on 9/14/21 at 1:57 pm
Do we have any hvac experts? I seem to have a shorted compressor on an older unit.
On two of the three terminals, I appear to have continuity to ground, and the system throws the breaker immediately upon turning on.
The compressor is a copeland zr45kc-pfv-135.
Also, the a-coil was updated years ago to accept the new refrigerant, so I'm guessing i can go with old or new.
What do I need to do?
***I'm not good with electrical, but I was confused about getting continuity between the two hot wires running to the compressor. The small wire going to the capacitor was fine, but the other two wires that came from the contactor showed continuity between each other.
On two of the three terminals, I appear to have continuity to ground, and the system throws the breaker immediately upon turning on.
The compressor is a copeland zr45kc-pfv-135.
Also, the a-coil was updated years ago to accept the new refrigerant, so I'm guessing i can go with old or new.
What do I need to do?
***I'm not good with electrical, but I was confused about getting continuity between the two hot wires running to the compressor. The small wire going to the capacitor was fine, but the other two wires that came from the contactor showed continuity between each other.
This post was edited on 9/14/21 at 1:58 pm
5
Posted on 9/14/21 at 2:08 pm to TSLG
You'll get much better answers on the Home and Garden board. There's some very helpful people over there.
Posted on 9/14/21 at 2:16 pm to TSLG
Call an AC company. You won’t be able to fix this on your own.
Posted on 9/14/21 at 2:18 pm to TSLG
Same thing happened to me last week. Just spend the $200 to have it done right.
This post was edited on 9/14/21 at 2:18 pm
Posted on 9/14/21 at 2:26 pm to TSLG
Your compressor is grounded. Call a repair shop to have it replaced.
Posted on 9/14/21 at 2:29 pm to TSLG
By your description you seem to have a short to ground in the compressor.
Regardless of your diagnosis, I doubt you have the tools to braze in a new compressor with a nitrogen purge, pressure test with n2, pull vacuum on the system, and weigh back in the refrigerant for the proper charge.
Unless you have the tools and experience to do all of the above you’re going to need a pro.
If you were satisfied with the company that changed out the a coil previously, call them.
Regardless of your diagnosis, I doubt you have the tools to braze in a new compressor with a nitrogen purge, pressure test with n2, pull vacuum on the system, and weigh back in the refrigerant for the proper charge.
Unless you have the tools and experience to do all of the above you’re going to need a pro.
If you were satisfied with the company that changed out the a coil previously, call them.
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