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Supermarket refrigerated showcase Defrosting device disassembly, diagnosis and maintenance
Supermarket refrigerated showcase Defrosting device disassembly, diagnosis and maintenance
The location of the defrosting device is installed behind the freezer air duct grid and in the refrigerator compartment component box. Among them, the defrosting thermostat, defrosting heater, and defrosting superheat fuse are installed in and near the evaporator behind the air duct grid of the freezer. The defrost timer is located in the supermarket refrigerated showcase. Therefore, when disassembling and diagnosing the defroster, it is necessary to open the air duct grid or component box first. [Note] When disassembling and assembling the air duct board and other components, the foam plastic should not be damaged, otherwise the refrigerating room will not get air-conditioning.
1. Disassembly and assembly of air duct grid and component box
1. Freezer air duct grid disassembly and assembly The air duct grid is an air duct groove formed by pressing plastic baffles and foam plastics, which is used for cold transmission of the freezer compartment Go to the refrigerator. Pry down the refrigeration shelf fixing card, take out the refrigeration shelf, grasp the protruding part of the tuyere, and pull out to take out the air duct grid. Installation is the reverse process of its removal.
2. Refrigerator component box removal is to remove the component box of the refrigerator compartment, remove the component box fixing screws or fixing clips, and remove the component box. Disassembly, diagnosis and maintenance of the device
2. Disassembly, diagnosis and maintenance of the defrost timer. After the supermarket refrigerated showcase works for a certain period of time, the defrost controller activates the defrost circuit. After the defrost is completed, the battery will automatically enter the brush Cold state. Generally speaking, the defrosting time is 30 minutes. The failure rate of the defrost timer is relatively low, and the defrost timer is checked only when there is no problem in checking other devices.
1. Defrost timer disassembly is the defrost timer disassembly. Unplug the supermarket refrigerated showcase power plug, remove the refrigerator compartment component box, remember the wiring color of each end of the defrost timer, remove the fixing screws of the defrost timer, unplug the wires, and take out the defrost timer. Installation is the reverse process of disassembly, and each color line is inserted in the original position and cannot be inserted incorrectly.
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