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What are the experiences of electronic control commercial refrigeration maintenance
author: supermarket refrigerated showcase category: walk-in display coolers Views: 512Time: 2016-08-22
electronic control commercial refrigeration maintenance experience
First use the test and self-diagnosis function of electronic control commercial refrigeration to initially determine the scope of the fault, and then routinely check different types of electronic control commercial refrigeration, due to design procedures Different, the fault code is also different.
l. There is no indication that the compressor does not work. The fault is caused by the computer board not working, usually the transformer primary or fuse open circuit; a few are computer board problems, maintenance procedures.
2. The crash is not displayed or the display is disordered, the key operation is invalid, and the compressor does not work is called a crash. The main reason is caused by the abnormal power supply of the main control board, and some are caused by the abnormal main control board, the maintenance process.
3. Compressor non-stop failure causes of compressor non-stop failure include: ①The cooling difference or the compressor control relay cannot be disconnected after it is switched on; ②The temperature drift of the sensor; ③The compressor control signal line and the low-voltage DC power line are short-circuited; The main control board circuit is faulty.
4. Compressor not running The reasons for the failure of the compressor not running are: ①Compressor failure; ②Compressor controller control line failure; ③Compressor relay cannot be closed; ④Refrigeration and freezer compartment sensors have a lower temperature at the same time Large drift; ⑤The compressor control signal line is broken; ⑥commercial refrigeration main control board failure.
5. Low temperature in cold storage room maintenance process: The main reasons for low temperature in cold storage room are: ① solenoid valve is damaged; ② solenoid valve control relay malfunctions; ③ refrigerator temperature sensor temperature drifts down; ④ solenoid valve control signal line and low pressure The DC power cord is short-circuited; ⑤The main control board is faulty.
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