Causes of low suction pressure of refrigeration unit and troubleshooting

The cause of low suction pressure of refrigeration unit and the troubleshooting method what is the cause of low suction pressure of refrigeration unit? How to solve this problem? In fact, there are many reasons for the low suction pressure of the refrigeration unit, so let's briefly talk about the causes of this failure and the solutions 1 The condenser refrigerant liquid outlet valve is not fully open The valve shall be fully opened 2 The refrigerant filter is blocked Clean or replace the filter regularly 3 The expansion valve is improperly adjusted or malfunctioning Correct adjustment or troubleshooting is required, and replace if necessary 4 Insufficient refrigerant charge It shall be supplemented to the specified quantity 5 The excessive lubricating oil circulates in the cooling system of the chiller The cause should be identified and reduced to the appropriate value 6 The water inlet temperature of evaporator is too low Increase the set value of water inlet temperature 7 The water flow through the evaporator is insufficient Check the water pump and water valve As the cooling water of the refrigeration unit is an open circulation circuit, the tap water commonly used is recycled by the cooling tower When the content of calcium salt and magnesium salt in water is large, it is easy to decompose and deposit on the cooling water pipe to form scale, which affects the heat transfer If the scale is too thick, the cooling water flow section will be reduced, the water volume will be reduced and the condensation pressure will be increased Therefore, when the quality of the cooling water used is poor, the cooling water pipe shall be cleaned at least once a year to remove the scale and other dirt in the pipe Prevent the blockage of the pipeline.