Hi, thanks for the reply!

I'm not completly sure the relay is the white box. I disassembled it
and there was only a ceramic disc, what I assume to be an overload
protection. There are only two real contacts inside, one at each side
of the ceramic disc. But each contact goes out by two pins each. So, I
have 4 pins, 2 of them wired to one side of the disc, and the other 2
wired to the other side of the disc.

The black box is sealed. Pin 1 is wired to, but not connected to, an
empty hole in the white box, as expecting to be jumpered to one of the
4 pins in it. Pin 2 and 3 are ready to connect to "something", but pin
3 is different, smaller than the other.

I have electronics and electric knowledge. I have tested both, and I
get almost 0-ohm between every pair of pins in the black box, and 0 ohm
between both sides of the white box.

Any idea??? Im completly lost!

Regards!
Eduardo

lsmartino ha escrito:

Edu ha escrito:

Hello.

I am trying to start a refrigerator compressor with a burnt relay, with
a new one, but the one I bought is a generic relay, and the pinout is
not the same as the original one.

The new one is this:

http://ww1.pureupload.com/public/pvi...5/IMG_0011.JPG

As you can see, the are two boxes. The white one has an overload
protector inside. The are two "real" pins. The black box (relay) has 3
pins, and pin 1 comes tied to a spare hole in the overload protector, I
think that expecting me to wire it to a real pin.

I don't know how to feed it. I tried powering one of the pins in the
protector with 220v, the other pin of the protector to pin 1 of relay,
and then pins 2 & 3 of the relay to run & start in the compressor, but
the compressor start winding burnt. I have another compressor the test,
but no more...

Any help would be appreciatted.

Thanks in advance!
Eduardo

You are completely wrong. The white box IS the relay, and the black
circular piece is the overload protector. You have to connect one of
the two incoming wires to the remaining terminal of the overload (the
black circular piece), and the remaining wire to the relay, which is
the white box. The relay must be plugged in the compressor. The
compressor has three pins and the RELAY (remember, the white box)
should have three holes to plug it directly to the compressor.

One the 4 external contacts of the relay should be marked as common.
That´s the one you will use to connect the remaining power wire. The
other three contacts are provided in case you need to use a run
capacitor, a start capacitor or both. If your compressor doesn´t need
a cap, you just leave these contacts unused. If the common terminal
isn´t marked, or the relay kit didn´t came with an electrical
schematic, you should determine which one is common with a DMM.

Again: the relay is the white box, and the circular black piece is the
overload protector.

If all this sounds like japanese to you, or you don´t know how to use
a DMM, look for a refrigeration technician.

The other pins of the relay are provided to connect an startup
capacitor, a run cap, or both, in case the compressor needs them.