The vending machine line fault judgment

The vending machine is not in the supermarket refrigeration, we first need to electrify listen to sounds, determine the compressor running, open the fridge door, hear the sound is ringing sound glug, glug, said it may have no refrigerant, may be high pressure leak; How is hiss, and then touch the capillary exports, there is a little cold, said there is a little refrigerants, may be a low pressure leakage. All these above are preliminary shut off in the vending machine, specific combination of pressure and filter condition to decide, even after hearing the voice down, 15 ~ 20 minutes to open the process tube, ice wall have to wait for the ice to melt, when open pipe cutter cut in half, not with a plastic cover the cutter and process pipe, with versatile down again, then you can know the system pressure situations: is the negative pressure? Zero pressure? A refrigerant or positive pressure positive pressure a refrigerant. If at first the vending machine has a hiss and a bit cold, even in a few days a month and refrigeration, but ultimately no refrigeration, there is a sound compressor operation, very boring, not any other voice, is ice blocking can be determined, the downtime deicing can refrigeration again? In the vending machine certain frozen Ming pipe leakage cases, not leak, it must be refrigerated or is warm a glug, glug, sound to the vending machine can have a look at the vending machine ever water marks, at the gate of the door cabinets have rust, basic can tell if there is high pressure to leak, then find the door pipe to jilt door directly, can't find the door plugin condenser tube. Frame has the rust is mostly freezes refrigeration outlet pipe, the drain to deal with if you have open back to back position filed, water bubbles to remove, glue leakage. Shave frame and glue can play? Negative pressure, combined with the voice heard to glug, is a high pressure leak can be determined. Positive pressure combine filter condition, zero pressure more trouble, high and low pressure leakage are likely, in combination with filter state can be determined. Is a lot to determine whether the compressor exhaust pressure is normal, generally use thumb hold, judge compressor is no problem. No matter the vending machine is with brass, iron pipe, aluminum pipe or pipe, won't leak in no water in dry environment. The vending machine with better thermal insulation materials, using a few years in the frozen pipeline position more or less have some water, water in the freezer part foam layer is between liquid and solid, perennial use the vending machine in the frozen layer in the bubble water is frozen. Iron pipe in water rust, brass tube wall thin, water more dress may also have rust. Aluminum pipe itself is not easy to hydrolysis, but now with aluminum tube to the vending machine or capillary palace and aluminum tube joints in the freezer, capillary to middle and aluminum do heat exchange tube bundle together, capillary will have heat so even heat exchange area in the frozen layer, water is still in a liquid. Copper and aluminum contact position in the liquid water environment will produce ionization reaction, the aluminium tube corrosion. So as long as it is cold or part gas pipeline has funnelled back there must be involved in water, when the leakage to purple dot in the boot of negative pressure, water intake system, will be to remain in the filter. The vending machine water filter is must open back fill tube or tube exchanger, zero pressure filters and no moisture is commonly pipe rust is very serious, perforation is very big, also just remove the tube or plugins condenser.