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Home > Archive > Electrical Engineering > May 2006 > Problems starting refrigerator compressor (again)
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Problems starting refrigerator compressor (again)
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| New problems with my frige compressor...
The problem is that the start relay I bought blowed my compressor. I
have another one to test, but I cannot fail this time.
The relay looks like this:
http://uploadjar.com/uploads/relay.jpg
The part at the left has a ceramic disc inside. I suppose an overload
protector. Two pins are connected to one side, and 2 to the other.
There is a spare hole connected to pin 1 of the relay expecting to be
jumpered to some side of the disc.
The other part (the relay I suppose) has 3 pins. It is a black plastic
sealed cilindric box. It has almost-0 ohm between every pair of pins.
This is what I tested:
Applied 220v to one side of the fuse, jumpered the other side to pin 1
of relay, wired pin 2 to "start" of compressor, and pin 3 to "run" of
compressor. Wired neutral from 220v to common of compressor. The
compressor started well, but the fuse heated after 1 minute and
stopped. So i bypassed the fuse, and sweeped run/start wires.
Compressor started again, but after 1 minute, the start winding blowed.
It blowed smoke through the oulet, and the resistance of the start pin
became infinite. The compressor is in the thrash now.
I have another one to check, it is the same model. But this time I
cannot fail.
Any idea to avoid risks?
Thanks in advance.
Eduardo
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| You might try the group >> alt.hvac << possibly more.
"Edu" <edugimeno@hotmail.com> wrote in message
news:1148656678.787363.79580@j73g2000cwa.googlegroups.com...
> New problems with my frige compressor...
>
> The problem is that the start relay I bought blowed my compressor. I
> have another one to test, but I cannot fail this time.
> The relay looks like this:
>
>
> http://uploadjar.com/uploads/relay.jpg
>
>
> The part at the left has a ceramic disc inside. I suppose an overload
> protector. Two pins are connected to one side, and 2 to the other.
> There is a spare hole connected to pin 1 of the relay expecting to be
> jumpered to some side of the disc.
> The other part (the relay I suppose) has 3 pins. It is a black plastic
> sealed cilindric box. It has almost-0 ohm between every pair of pins.
> This is what I tested:
>
>
> Applied 220v to one side of the fuse, jumpered the other side to pin 1
> of relay, wired pin 2 to "start" of compressor, and pin 3 to "run" of
> compressor. Wired neutral from 220v to common of compressor. The
> compressor started well, but the fuse heated after 1 minute and
> stopped. So i bypassed the fuse, and sweeped run/start wires.
> Compressor started again, but after 1 minute, the start winding blowed.
>
> It blowed smoke through the oulet, and the resistance of the start pin
> became infinite. The compressor is in the thrash now.
>
>
> I have another one to check, it is the same model. But this time I
> cannot fail.
>
>
> Any idea to avoid risks?
>
>
> Thanks in advance.
> Eduardo
>
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