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Some matters needing attention in the maintenance of supermarket refrigerated showcase
author: supermarket refrigerated showcase category: commercial refrigeration Views: 513Time: 2016-08-22
Some matters needing attention in the maintenance of supermarket refrigerated showcase
Therefore, when installing or repairing the evaporator for gas welding, keep it away from the inner tank as much as possible, and it is best to place a heat shield on the inner tank.
Electrical system maintenance precautions During live maintenance, the human body cannot touch the electrical system device plugs, and the electrical system components are connected to AC 220V voltage. The method of measuring device resistance must be done with the power off. When disassembling the device, you must remember the location of each color wire. When replacing the device with three pins or more, it is best to remove and install it, that is, take the same type of device, and install it to the new one after unplugging a wire from the old device. The device is on the same terminal. The ground wire must not be inserted wrongly. Generally speaking, the yellow-green two-color wire is the ground wire, and the pin connected to the metal shell is the ground terminal.
refrigeration system maintenance precautions are introduced in the order of refrigeration system maintenance.
(1) When venting, ensure that the maintenance site is well ventilated so that there is an open flame. For models using R600a refrigerant, the ground exhaust fan must be turned on and it is strictly forbidden to vent in the user's home. In general supermarket
refrigerated showcase, open the compressor process tube to deflate. The ice block machine caused by improper maintenance process opens the capillary tube to deflate; when welding the blocked machine, cut open the capillary tube, the filter drier, and the compressor process tube in turn. (2) Be sure to confirm that all refrigerant in the system is discharged before gas welding. Generally, supermarket refrigerated showcase opens the compressor repair pipe to discharge all the refrigerant. For the secondary rework machine, if there is an ice block failure, you need to stop the machine for 24 hours and wait for the ice block to disappear, then open the capillary to vent, and make sure that the gas is exhausted at both nozzles; if there is a welding block, you need to cut the capillary first. Make sure that the two pipes are not sealed. Secondly, the filter drier is damaged and the air is released. Finally, the compressor process tube is cut to release the air.
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