How to determine the
pin configuration for fractional horsepower compressors and apply the
RP041 & RP081.
determine unknown terminal configuration for a compressor with terminals
X, Y, and Z, take a resistance reading between each terminal using the
RX1 scale and write down your readings.
reading will be between Start and Run. The other terminal has to
between Common and Start will be the middle value reading. The
reading between Common and Run will be the lowest reading.
You read 7.5
ohms between X and Y. You read 1.5 ohms between X and Z. The
last reading between Y and Z is 6.0 ohms. This makes X and Y the
Start and Run terminals and Z
you read the same resistance between all three terminals or read any
resistance to the body of the compressor at all, the compressor is
shorted and should not be hooked up to electricity