Issue with compressor unit
The fan of the compressor is always running, but the compressor never kicks in. By reading around, I figured the cap needs replacing so thats why the compressor never starts, but why is the fan always spinning?
So looking at the schematic, 3 wires head to the compressor. One is power, one is ground, and I assume the third one is the control signal. The spec sheet of the compressor doesn't say anything about the control, but looking at the specs for other compressors, I assume (or hope) that it is universally 24v? My line is always 3V/60hz, no matter if the AC is off or I turn it on.
So could it be a capacitor that needs replacing, or the signal being sent to the compressor that is off?
Thanks for any help.
If the fan is running you have more than 3 volts floating around there somewhere so I would be careful. If you have a capacitance tester then it should be checked but if you don't they are very cheap so you can just go to your local supply house and get one and put it on that may be the problem. If it isn't there are a couple of different thing to check. You need to make sure all the wires to the compressor from the terminal block to the capacitor to the contactor. If so then the windings on the compressor need to be checked for continuity. The windings my be burned open or one of the wires in the circuit could possibly be broken.
There is no 24 volt wire that goes to the compressor terminals. They are all line voltage. Non of them are a ground either. You have a common, run and start.
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