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What are the ways to repair walk-in cooler
What are the ways to repair walk-in cooler
Five-step repair walk-in cooler includes five steps: try, listen, touch, watch, and test. After the test machine, listen to the walk-in cooler working sound and the venting sound of the refrigeration pipe, touch the walk-in cooler evaporator and the temperature of the exposed refrigeration pipe device, and check the appearance, the surface of the evaporator, the frosting of the compressor return pipe and the capillary. Voltage, resistance and refrigeration line pressure are the five necessary methods to judge the failure of the walk-in cooler.
1. Trying the machine is the premise of seeing, listening, touching and testing. The test machine time is determined by the failure phenomenon, the cooling differential test machine time is 30 minutes-60 minutes; to see if the refrigeration is normal, it takes 40 minutes-60 minutes to test the machine; the repair machine test machine 20 minutes-60 minutes for the indirect cooling walk- in cooler, you should also set the defrost timer to the forced defrost point.
2. Listen to
(1) There is no cooling and no running sound machine to hear whether there is click protection sound. If the compressor does not run but there are clicks and protection sounds, 90% is the compressor and accessories problems, 10% is the household electricity is too high or too low; if there is no compressor running sound, there is no clicks and other abnormal sounds , First consider whether the walk-in cooler can get AC 220V voltage, and secondly, whether there is any problem with the temperature controller and overload protector in the compressor and power supply circuit.
(2) No cooling or poor cooling. Normal operation. The sound machine turns on the system to bleed, and listen to the bleed sound to roughly understand the internal cooling capacity. If there is a large amount of refrigerant discharge sound, 90% of it is because the compressor does not discharge or the performance is poor; if there is a small amount of refrigerant discharge sound, it is because there is less refrigerant. The first failure is mostly because of the leakage of the refrigeration pipeline, and the second failure is mostly for refilling. There is little refrigerant; if there is no sound of gas discharge, there is no refrigerant in the refrigeration pipeline.
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