High pressure faultof chiller
冷却器由四个主要组件组成：压缩机，蒸发器，冷凝器和膨胀阀，从而实现了装置的冷却和加热效果。
High pressure fault of chiller refers to the high exhaust pressure of compressor, which causes the high voltage protection relay to work.The exhaust pressure of the compressor reflects the condensation pressure. The normal value should be 1.4~1.8MPa, and the protection value should not exceed 2.0MPa.Because the long-term pressure is too high, will lead to compressor running current is too large, easy to burn the motor, resulting in compressor damage.
高压故障的主要原因是什么？
1.Excessive refrigerant charging.This situation generally occurs after maintenance, performance for suction and exhaust pressure, balance pressure are on the high side, the compressor running current is also on the high side.
解决方案：discharge refrigerant according to suction and exhaust pressure and balance pressure at rated working conditions until normal.
2.Cooling water temperature is too high, condensation effect is bad.The rated operating condition of cooling water required by the chiller is 30~35℃. High water temperature and poor heat dissipation inevitably lead to high condensation pressure. This phenomenon often happens in high temperature season.
解决方案：高水温的原因可能是冷却塔故障，如风扇不打开甚至相反，冷却水温的性能高，迅速上升;外部温度高，水道短，金额短，金额短，量短循环水很小。冷却水温度通常保持在更高的水平。可以采用额外的水库。
冷却水流量不足以达到额定水流。主要性能是，该单元的水压差异变小（与系统操作开始时的压力差相比）和温度差异变大。
解决方案：如果管道过滤器被堵塞或过于细，则渗透率受到限制，应选择合适的过滤器，应当定期清洁过滤器屏幕。选定的泵很小并且与系统不匹配。
4.The condenser scales or clogs.The condensed water is usually tap water, which is easy to scale when the temperature is above 30℃. In addition, as the cooling tower is open and directly exposed to the air, dust and foreign matter can easily enter the cooling water system, resulting in fouling and blocking of the condenser, small heat exchange area, low efficiency, and affecting the water flow.Its performance is the unit in and out of water pressure difference and temperature difference is large, the condenser temperature is very high, condenser liquid copper is very hot.
解决方案：the unit should be back flushed regularly, chemical cleaning and descaling when necessary.
5.电气故障引起的警报。为高压保护继电器受潮湿，接触或损坏，单位电子板潮湿或损坏，通信故障导致误报。
解决方案：this kind of false fault, often on the electronic board of the fault indicator light is not bright or slightly bright, high voltage protection relay manual reset invalid, measure the compressor running current is normal, suction and exhaust pressure is normal.
6.重新制剂与空气，氮和其他非冷凝气体混合。制冷系统中空气，多次有很多空气，高压计上的针将摇晃。
解决方案：this situation generally occurs after maintenance, vacuum not thoroughly.We could empty the condenser at its highest point or re-vacuum the condenser and add the refrigerant after shut down.
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Post time: Sep-01-2019