How to solve the failure of the Dongguan vending machine pipeline?

How to solve the failure of the Dongguan vending machine pipeline? The Dongguan vending machine is not refrigerating. First, we have to turn on the electricity and listen to the sound, make sure the compressor is running, and open the door of the refrigerating room. The sound is crisp and gurgling, which means that there may be no refrigerant in it, it may be High pressure leak; how is the hissing sound, touch the capillary again to get the outlet, it is a bit cold, it means there is still a little refrigerant, it may be a low pressure leak. If the unmanned vending machine has a hissing noise and a little bit of cold at first, it will still be cooled in a few days or even a month, but eventually it will not be cooled, there will be a compressor running sound, it is very muffled, and there is no other sound, you can be sure that it is If the ice is blocked, it can be refrigerated after shutting down to melt the ice. When the unmanned vending machine confirms that the frozen tube is not leaking, it must be a refrigerated or variable temperature leak. The unmanned vending machine has a gurgling or beeping sound. You can check whether there is any trace of water flowing at the door of the unmanned vending machine. Whether the door cabinet is rusty, if there is a high-pressure leak, it can be concluded that the door tube can be found at this time, and the door tube can be directly thrown away. If the door tube is not found, the external condenser can be attached. The door frame is rusty and most of the refrigerated outlet pipe freezes. If there is an open back, the drain pipe should be treated. Lift it up to the back plate position. The foam should be dug out and the leak is glued. Scrape the door frame and apply glue on it. The negative pressure, combined with the beeping sound heard before, can confirm that it is a high-pressure leak. The positive pressure needs to be combined with the filter status. Zero pressure is more troublesome, and high and low pressure leakage may occur. It can be determined by combining the filter status. The positive pressure is too large to determine whether the compressor discharge is normal. Generally, you can’t hold it with your thumb and judge that the compressor is okay. Regardless of whether the Dongguan vending machine uses copper pipes, iron pipes, aluminum pipes or composite pipes, it will not leak in a dry environment without water. No matter how good the insulation material of the unmanned vending machine is, there will be some water in the position of the refrigerated pipeline for a few years. The water in the foam layer of the refrigerated room is between liquid and solid, and it is not used all the year round. The vending machine gets water in the foam of the freezing layer because it freezes. Iron pipes rust when exposed to water, and the same is true for copper pipes whose walls are thin. If there is more water, rust may wear out. The aluminum tube itself is not easy to be hydrolyzed, but now the aluminum tube is used in the unmanned vending machine or the capillary and the aluminum tube are connected in the cold room. The middle section of the capillary tube and the aluminum tube must be wrapped together for heat exchange. The capillary tube will have heat. Even if the heat exchange site is in the frozen layer, the water is still in a liquid state. The contact position of copper and aluminum will produce ionization reaction in an environment with liquid water, which will cause corrosion of the aluminum tube. Therefore, as long as there is a leak in the refrigeration or return air part of the pipeline, there must be water involved. When the leakage to the purple point is negative when the machine is turned on, the water will definitely be sucked into the system and stay in the filter. If there is water in the filter of Dongguan vending machine, you must open the back pipe or change the pipe, and there is no water in the filter when the pressure is zero. Generally, the door pipe is very rusty and the perforation is large. You only need to remove the door pipe or external hanger. The condenser will do. If you need to know more about Dongguan vending machines, please click to enter our company's official website, you can find more relevant information. Previous post: What functions does the fruit and vegetable vending machine have?