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What Should I Do If The Suction Pressure Of The Refrigeration Unit Is Too Low?

Aug 17, 2020

What should I do if the suction pressure of the refrigeration unit is too low?


It is understood that in the process of using refrigeration units, many users often find that one day the cooling effect is suddenly worse than before, or there is no cooling. What is going on? The industry said that the refrigeration unit is poorly cooled, which means that the equipment is bad. Inspiratory pressure is too low.


So, what is the reason for the low suction pressure of the refrigeration unit? How should the user solve it? In this regard, some factory technicians said that there are actually many reasons for the low suction pressure of the refrigeration unit, including the blockage of the refrigerant filter Valves, not fully opened, insufficient refrigerant charging, etc., here is a brief introduction to common faults and their solutions.


  Fault 1: The refrigerant filter is clogged. The refrigerant filter has an important filtering function and should be kept unblocked. If clogging occurs, the filter needs to be cleaned or replaced regularly.


   Fault 2: Improper adjustment of the expansion valve or failure. If this phenomenon occurs, it is recommended to adjust the correct or troubleshoot immediately, and replace it if necessary.


   Fault 3: The condenser refrigerant liquid outlet valve is not fully opened. It is reported that if the refrigerant liquid outlet valve of the condenser is not safely opened, the refrigeration unit will produce a situation where the suction pressure is too low. At this time, the valve should be fully opened.


  Fault 4: The amount of water passing through the evaporator is insufficient. In this case, the cooling capacity will also decrease and the cooling effect will be poor. The user should check the water pump and water valve in time.


  Fault 5: Excessive lubricating oil circulates in the chiller refrigeration system. If you find that there is a lot of lubricating oil in the refrigeration system, you should find out the reason at this time and reduce it to an appropriate value.


  Fault 6: When the inlet water temperature of the evaporator is too low, the cooling effect is not good. The set value of the inlet water temperature should be increased.


   Fault 7: The amount of water passing through the evaporator is insufficient. In this case, the cooling capacity will also decrease and the cooling effect will be poor. The user should check the water pump and water valve in time.


In addition, technicians said that since the cooling water of the refrigeration unit is an open circulation loop, the tap water generally used is recycled through the cooling tower. When the calcium salt and magnesium salt content in the water is large, it is easy to decompose and deposit on the cooling water pipe. The formation of scale, thereby affecting heat transfer. "If the scale is too thick, the flow cross-section of the cooling water will be reduced, the amount of water will decrease, and the condensation pressure will increase."


The technicians suggest that when users find that the water quality of the cooling water used by the refrigeration unit is poor, it is recommended to make a regular cleaning plan to clean the cooling water pipe at least once a year to remove the scale and other dirt in the pipe to prevent the pipe Blockage of the road.


   Eliminate the above seven kinds of faults. If the user still cannot find the cause, he can contact the manufacturer for maintenance service. This is also the important significance of the existence of a regular refrigeration unit equipment manufacturer.