【 Weak current College 】 compressor common faults and maintenance methods

Compressor air conditioner refrigeration system is the most important part, as a result of compressor is different from the condenser, evaporator, the non-movement part, the system work to high-speed rotation, it is a kind of mechanical and electrical integration of high-precision equipment, so in actual use often fail.
Trouble phenomenon:
1, winding, circuit breakers and winding touch enclosure earthing: such a failure by the compressor motor parts, its symptoms are normal for the power circuit, the compressor does not work; when a short circuit and touch shell after powerup protector actions, or burning fuse; it should be noted that if the windings of minor short circuit, the compressor can work, but the operating current is large, the compressor is very hot, it won't be long before, the thermal protector it will behavior. Winding and winding touch shell grounding can check for general use multimeter; winding particularly mild short circuit, due to the winding resistance is very small, so it is not easy to determine, according to the judgment for current measurement.
2. compressor cylinder axle, card: compressor if missing oil or impurities into the often causing axle or card cylinder, its symptoms, powerup compressor does not spin, protector of the action.
3. compressor suction and discharge valve closes strictly: If the compressor suction and exhaust valve damage, even if the refrigerant adequate system cannot establish a high-voltage or difficult to establish a qualified high-voltage, the system no refrigeration or cooling effect is very poor.
4. compressor vibration and noise: this type of problem in maintenance work, most often occur in the performance of refrigeration has little impact, but will make users feel it is not, the cause is often caused by the pipeline and the enclosure colliding, compressors of fixed bolt and damping block off, etc.
5, thermal protector damage: Thermal Protector is the compressor accessories, fault typically circuit breaker or action temperature points smaller. Circuit breaker will cause the compressor does not work; action temperature point size will cause the compressor to work for a period of time after the downtime and repeatedly so that the problems are often easily and winding slightly confused with short circuit, thermal protector is corrupted when the operating current is normal, when the current bias winding.
Maintenance method:
Compressor motor part of the problem, turn off the compressor suction and discharge valve are not strict and thermal protectors should be replaced.
Compressor cylinder axle, card failure can first try to repair, specific methods for the following:
(1) percussion method:
Powered by wooden hammer compressor, the compressor in the lower section of the internal parts were shocked by the card.
(2) capacitor start method:
You can use an electrical capacity larger than the original access circuits start capacitor.
(3) high pressure start method:
You can use the power supply voltage regulator will increase after startup.
(4) the relief method:
The system starts after all venting refrigerant.
If the above methods are ineffective, just replace it.
Compressor vibration and noise problems, you should check and separate the parts of mutual impact; check and anchor bolts fastening the compressor, the compressor of anchor bolts are not completely screwed in the end, this design requirement must maintain a gap of about 1mm, maintenance procedure in the dead bolt screw compressor from compressor violent vibration case; whether you want to check the shock block, paste does jail *, or you can try to increase shock absorption block, specific location using heuristics, note where the effect is good to post there.