< br >
Air conditioning compressor is very important to air conditioning, if there is a problem with the start capacitor then the air conditioning will not work normally, if the start capacitor has a problem, and can not find the master home repair, then we need to manually replace the start capacitor, so it is important to master the replacement method of the start capacitor of the air conditioning compressor.
Air conditioner compressor startup capacitor
Generally speaking, air conditioning has single-phase power and three-phase power, single-phase power has three capacitors, namely, the internal fan capacitor, the external fan capacitor and the compressor capacitor; The three-phase compressor does not use capacitors, so there are only two capacitors, that is, the internal fan capacitor and the external fan capacitor. So, how to detect the quality of air conditioning compressor starting capacitors?
< br >
The measurement of air conditioning capacitors must be judged accurately with a mechanical watch. The method is to hit the multimeter to 1K or 100 ohms, and the two pens are connected to the two electrodes of the capacitor under test. Observe the reaction of the watch hand, if the watch hand quickly approaches zero, and then slowly go back (to infinity), go to a place to stop, indicating that the capacitor is basically good. The closer the return residence is to infinity, the better the mass, and the farther away it is, the more leakage. If the multimeter hands quickly swing to zero or close to zero and do not move, it means that the capacitor poles have a short circuit fault and cannot be used. If the watch hand does not move at all when the pen and the two poles of the capacitor are connected, it indicates that the internal connection of the capacitor has been disconnected and cannot continue to be used.
< br >
Replacement method of starting capacitor of air conditioner compressor:
< br >
1. Power off first, be sure to power off first, to ensure that it is in a safe situation;
2, ready tools and new capacitors, go to the outdoor unit, open the top cover of the external machine, the top of the wire can be seen, open the screw fixing the capacitor, clamp the terminal with pliers to unplug the cable, remember the color position, so as not to install the wrong, afraid of wrong, unplug one directly installed on the new capacitor, the original capacitor if not completely failed may have excess electricity, pay attention to safety;
3, after the replacement, first power up and start to try, normal, and then fix the cover can be.
< br >
How to connect the air conditioner compressor starting capacitor?
< br >
(A) if the compressor line is red, yellow and black
1, that is, insert the red wire into the compressor capacitor and connect the first red wire to the male end insert;
2, the yellow line is connected to another section of the capacitor;
3. As for the black wire, it is directly connected to the second chip from the left on the terminal board (that is, the second blade you said is the same port as the fan motor connected to the black wire.
< br >
(2) If the compressor line is blue yellow brown
1, that is, insert the blue wire into the compressor capacitor and connect the first red wire to the male end of the plug;
2, the yellow line is connected to another section of the capacitor;
3. As for the brown wire, it is directly connected to the second insert from the left on the terminal board (that is, the second insert you said is the same port as the fan motor connected to the black wire.
< br >
(3) Other types
The air conditioner external machine is two capacitors, two motors, compressors and external fans of these two motors! There are three joints out of the motor, these three joints are the common winding, the main winding, the secondary winding, 220V mains connected to the common winding master winding above, the indirect capacitance of the main and secondary winding. How do these three windings differentiate. You can measure it with a multimeter on ohm. The resistance value is the largest between the main winding and the pay winding, so it can be judged that the other head is the common end; After determining the common end, it is easy to judge the main winding and the pay winding, and the resistance value of the common end resistance is small is the main winding, and the resistance value of the common end resistance is large is the secondary winding.
< br >
By the way, the air conditioning capacitor is a wearing part, the general compressor starting capacitance capacity and the capacity of the standard distribution capacity deviated by 15% will not lead to abnormal compressor operation, the actual process can be based on the specific operation of the air conditioning compressor necessary capacity adjustment
1. Before replacement, check the cause of damage to the original refrigeration compressor and replace the defective parts. The damage of other components will also directly affect the damage of the refrigeration compressor, remember!
2. After removing the damaged refrigeration compressor, the nitrogen purge system must be used before the new refrigeration compressor system can be connected.
3. When welding, in order not to generate an oxide film on the inner wall of the copper pipe, nitrogen should be introduced, and the time of nitrogen arrival should be sufficient.