Wiring method of air conditioner compressor capacitor

There are three wires connected to the compressor. If the compressor is running or not, you can touch the two copper pipe nuts of the outdoor unit. If the small pipe is cold, it will start.

If it is red, yellow and black

1. Insert the plug of the red line into the capacitor of the compressor and connect it with the front red wire to the public plug

2. The yellow wire is connected to the other end of the capacitor

3. As for the black wire, it is directly connected to the second plug from the left on the terminal board (that is, the fan motor connected to the second and black wires you mentioned is the same port)

If the compressor wire is blue and tan

1. Insert the plug of the blue line into the capacitor of the compressor and connect it with the front red wire to the public plug

2. The yellow wire is connected to the other end of the capacitor

3. As for the brown wire, it is directly connected to the second plug from the left on the terminal board (that is, the fan motor connected to the second and black wires you mentioned is the same port)

This problem is very simple, no need to look at the circuit diagram.

The external unit of the air conditioner is two capacitors and two motors, the two motors of the compressor and the outdoor fan!

There are three connectors coming out of the motor. These three connectors are the common winding, the main winding, and the auxiliary winding.

The 220V mains is connected to the public winding and the main winding.

Connect a capacitor between the primary and secondary windings.

How to distinguish these three windings

You can measure it with a multimeter in the ohm range.

The one with the largest resistance value is between the main winding and the secondary winding, so it can be judged that the other end is the common end;After the common terminal is determined, it is easy to judge the main winding and the secondary winding. The main winding has a small resistance to the common terminal, and the secondary winding has a large resistance to the common terminal.

Also talk about the measurement method of large capacitance

1. A few seconds after the AC power is connected,short the two legs of the capacitor, is there any spark generated?

2. Digital multimeter measurement, switch to the ohm range (K ohm level), you can see that the reading jumps from 1 to a reading instantly, and then returns to 1 immediately

3. Using a digital multimeter, see the pointer swing from left to right and then return to the original position immediately