![]() ![]() ![]() Your compressor is still cooling, but not cooling to its rated capacity. When your compressor has both a low head pressure and a high suction pressure your refrigeration equipment is still running, but the temperature is dangerously low. What Causes Your Suction Pressure to Rise? One or more compressor disc valves leaking.Hot gas bypass/capacity regulator defective.Some reasons you are having high suction pressure include: If your temperature and pressure outlet of the evaporator or suction pressure keeps going up it means you are having a problem with your EXV. Your remote bulb should react and move the electric expansion valve, or EXC, to the opening direction to allow more refrigerant to flow in the evaporator to handle the cooling load. You can perform an analysis by checking the outlet of the evaporator, which is leaving the refrigerant at a high temperature. If your compressor piping and amperage appear fine, then you need to perform another analysis. ![]() One way to determine if the problem is fixable is by examining your compressor. High suction pressure is a problem that can be quickly determined and fixed. Suction and Discharging Pressure Problems Explained Without a needed refrigerant, it produces a higher temperature and pressure at the outlet of the evaporator, which causes a high suction pressure. ![]() This indicates that your compressor cannot provide the needed refrigerant to the evaporator to handle the cooling load. Meaning your refrigeration has a leaking discharge valve. There are both high and low settings for each pressure line.įor a high-pressure suction to occur you could have an insufficient compressor. The two systems are suction pressure and discharging pressure. A basic understanding of your refrigeration system is learning about the two operating systems. The refrigeration cycle should be examined. If you do not have an understanding then you will spend more time guessing what the problem is instead of solving the problem. One issue that is commonly faced by HVAC systems is high suction pressure. But what causes high suction pressure? You need to have a good understanding of your refrigeration cycle to see what is happening in each process. ![]()
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