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Electronic control commercial refrigeration case analysis
electronic control commercial refrigeration case analysis
1. refrigerated showcase commercial refrigeration BCD-218W refrigerated temperature is high, indicating H failure phenomenon: the refrigerating room temperature is too high, the display temperature is H . Failure analysis: the return air outlet of the refrigerating room is blocked by ice, and the cooling capacity circulation is not. Failure analysis: the return air outlet of the refrigerating room is blocked by ice, and the cooling capacity is not smoothly circulated. Larger will also block the exit of the return air channel. Troubleshooting: Change the outlet of the return air channel, use a blade to cut a slot on the lower heat insulation seat, and at the same time enlarge the outlet of the upper heat insulation seat, try to move the evaporator to the right and inward to make the return pipe on the evaporator as far as possible Keep away from the outlet of the return air duct, paste a sealing tape on the sealing groove of the lower heat insulation seat, or use a thin sponge sealing strip with glue for heat insulation sealing, so that the cold capacity of the evaporator does not flow back into the return air duct.
2. refrigerated showcase commercial refrigeration BCD-218W poor cooling, display H failure phenomenon: poor cooling, display H , the condenser is not very hot, frost on the evaporator, press the door switch during operation, and no cold air blows from each outlet . Failure analysis: After disassembling in order, confirm it. Troubleshooting: First force defrost twice, check the connection reliability of the main and auxiliary heaters, and measure whether the resistance of the defrost heater is normal from the main control board, that is, after unplugging the power supply, measure the 1, 5 of the CON3 plug Foot resistance: Check that the thread in the wiring cap in the foam isolation seat is ancient. Check: Check the water outlet of the isolation seat and whether the PE gasket is leaking: Check whether the water outlet of the isolation seat and the drain groove are deformed.
3. refrigerated showcase commercial refrigeration BCD-226A refrigeration is gradually worsening, helps flicker Failure phenomenon: The compressor runs regularly, but the refrigeration is getting worse, the display screen appears EO and flickers. Failure analysis: There is a problem with the defrosting sensing part. Troubleshooting: Measure the resistance between the CON3 pin of the main control board to determine whether the fault lies in the defrost sensor or the plug.
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