Compressor failure of central air conditioning maintenance

Compressor failure of central air conditioning maintenance The compressor as the core component of the air conditioner is similar to the "heart". Its failure will affect the operation of the entire system. Let's take a look at the compressor failure of the central air conditioning maintenance: 1. Winding short circuit, open circuit and winding touching the chassis ground: this type of fault is caused by the motor part of the compressor. The fault phenomenon is that the power supply is normal when the circuit is open. The compressor does not work; the protector is energized when short circuit and touch the shell Action, or burn the fuse; it should be noted that if there is a slight short circuit between the turns of the winding, the compressor can still work, but the working current is large, the temperature of the compressor is very high, and the thermal protector will act shortly. The short circuit of the winding and the contact of the winding with the chassis ground can generally be checked with a multimeter; the short circuit of the winding, especially the slight short circuit, is not easy to determine because the resistance of the winding itself is small, and it should be determined based on the measured current. 2.Compressor stuck cylinder and holding shaft: The phenomenon that the compressor stuck cylinder and holding shaft is that the compressor cannot start up, and the sound always shows a "buzzing" sound, mainly due to the return air caused by too much refrigerant in the refrigeration system When the liquid refrigerant cannot be completely vaporized, the compressor sucks a part of the liquid, causing the upper and lower casings of the cylinder to collide with heat and cold, thereby blocking and holding the shaft; there are also some indoor units that are seriously clogged and the gas and liquid exchange cannot be completed in the refrigeration system . 3.Compressor fault repair method for central air conditioning repair: 4. (1) Percussion method: knock the lower part of the compressor with a wooden hammer after starting up, so that the internal parts of the compressor are vibrated and operated. (2) Capacitance start method: a capacitor with a larger capacitance than the original can be used to start the circuit. 5.3. Judgment that the machine has lost its ability to work. 6.It means that the compressor can run normally, but has lost the functions of suction and exhaust. First, cut the compressor filling process pipe with scissors. If a large amount of R22 is ejected, it can be judged that R22 does not cool due to leakage. At this time, the suction and exhaust pipes of the compressor can be melted off with a welding torch, the compressor can be removed, and the compressor can be started separately. After the compressor is operated, the suction and discharge pressure of the compressor can be tested by hand. 7.You should first test whether the suction port is inhaled. Then, test whether the exhaust port is exhausted. Block the exhaust port with your hand. If you feel that the pressure is not very large, or even there is no exhaust, you can think that the compressor has lost its working capacity . Because during normal operation, the compressor exhaust can not be blocked with fingers.

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Compressor failure of central air conditioning maintenance

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