Tips for troubleshooting the refrigeration system of low-temperature chillers

Tips for troubleshooting the refrigeration system of low-temperature chillers

Regular maintenance work for the low-temperature chiller, while troubleshooting the refrigeration system of the low-temperature chiller is also very important. Here is a brief introduction to some low-temperature chiller refrigeration system failure tips for your reference!

　　1. Exhaust at double pressure, heat dissipation may be problematic.

　　 When it is detected that the high and low pressure of the system are higher than normal, it is generally because there is air in the system or excessive refrigerant is added. At this time, it is necessary to re-evacuate and add proper amount of refrigerant to solve the problem. But there is another situation, that is, poor heat dissipation, especially when the ambient temperature is relatively high, which often results in worse heat dissipation. The cause of this failure is generally the blockage of the heat sink, dirt, and insufficient speed of the heat dissipation fan.

　　2, the pressure is double low loss refrigerant, otherwise the system will be shut down.

　　 When the high and low pressures are low, there are two possibilities: [low temperature freezer]

　　 (1) The system is blocked, the blocked part will produce throttling, and the throttling part will have a significant temperature difference, and the problem can be found by hand.

　　 (2) The leakage of refrigerant leads to insufficient refrigerant. This situation is relatively common. At this time, a low-temperature chiller detector must be used to find out the leaking location and perform replacement.

　　 3. Low pressure, high pressure, low pressure, replace the compressor.

　　 When the low pressure of the low temperature chiller system is higher than normal with the low temperature chiller pressure gauge, but the high pressure is lower than normal, the chiller refrigeration at this time absolutely cannot achieve the effect of the normal low temperature chiller. The reason is likely to be the wear and tear in the low-temperature chiller pump, resulting in a drop in power. At this time, it is often necessary to replace the compressor to solve the problem.

　　 4. There is water vapor in the meter shake system, so the evacuation must be more thorough.

　　 When the low-temperature chiller system is working, if the pressure gauge needle keeps shaking, it means that the system has moisture. To solve this problem, the vacuum must be re-evacuated, and the time must be no less than 15 minutes. If necessary, the drying bottle must be replaced to completely drain the water in the system.