- #1
fourthindiana
- 162
- 25
Preface to thread: The multimeter is set to read resistance in all the scenarios I ask about in this message.
The word "COMP" in the ladder diagram stands for compressor motor.
The three letters underneath the capacitor are DRC, which stands for Dual Run Capacitor.
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In the ladder diagram that I attached in the above picture, the start winding of the condenser motor is shorted to ground. The word "COMP" in the ladder diagram stands for compressor motor. About a week ago, an acquaintance of mine named Billy told me about what would happen in the situation portrayed in this ladder diagram. On the same day that Billy told me about this, I wrote down what he said to the best of my recollection. I wrote the following: "In the diagram, the condenser motor is shorted to ground, and the fact that the condenser is shorted to ground causes there to be resistance to ground at the contactor to ground."
Now I'm not so sure what Billy meant by "resistance to ground at the contactor to ground."
Billy told me that in the situation portrayed in the ladder diagram, my multimeter (set to Ohms) would have a resistance reading greater than zero Ohms but not an OL ( OL= open line). Billy told me that my multimeter would have a far different resistance reading if there was no short on the condenser motor or anywhere else than I would get if there was a short in the condenser motor. I'm not able to get in touch with Billy to get him to clarify this. I was hoping that you people could help me understand this.
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In the ladder diagram in the attached photograph, is the multimeter going to measure the resistance from everything to the right of where the red lead attaches to the contactor all the way to the ground?
In the ladder diagram in the attached photograph, is the multimeter only going to measure the resistance from where the red lead attaches to the contactor to the wire going from the contactor to the condenser motor to the start winding of the condenser motor while not measuring the resistance of anything in the compressor motor?
The answer cannot be yes to both of the above questions.
In the ladder diagram in the attached photograph, would the resistance measured by the multimeter be higher if there was no short to ground in the condenser motor?
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