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Indirect walk-in cooler maintenance experience
author: supermarket refrigerated showcase category: commercial refrigeration Views: 503Time: 2016-08-22
Indirect walk-in cooler maintenance experience
Indirect walk-in cooler has no cooling or poor cooling, which is mostly caused by electrical abnormalities, such as failure to defrost or blocked air ducts Wait.
1. Refrigeration system maintenance experience. Because the structure and work of the refrigeration system are the same as the ordinary walk-in cooler, the maintenance experience is also the same. For models with rotary compressors, a lift valve is added to the system, which is extremely low due to the lift valve, and the maintenance experience used is roughly the same as that of the ordinary walk-in cooler, except that the check valve should be considered if the pipeline is blocked. Deadline is nowhere. The cooling difference should check whether the one-way valve is always unblocked.
2. Electrical system maintenance experience. The electrical system of the cold machine adds a defrosting circuit on the basis of the ordinary walk-in cooler, and the defrosting circuit directly affects the work of the compressor circuit. Therefore, firstly eliminate the failure of the refrigeration cycle (process) system during maintenance, and proceed by observing the frost on the back of the freezer compartment and whether the fan is running or not. Thick ice (frost) forms on the back of the freezer compartment, and the fault lies in the defrosting circuit. There is no icing (frost) on the back of the freezer. Press the fan motor switch and see if you can hear the fan rotating. If it does, it proves that the walk-in cooler thermostat is in the path and the defrost timer contacts The switch is in the refrigeration position, and vice versa: Then, measure the resistance of about 25 ohms at both ends of the power plug (actually, it is an indirect measurement of the compressor running coil). If this resistance is present, it proves that the compressor power supply path is basically normal. Further check whether the starter and compressor are normal.
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