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The high voltage protection of the unit operation panel is often caused by many reasons, and it is often troublesome to find the problem quickly and accurately.
Common causes and analysis of high voltage alarms
Always check whether the voltage of the power supply meets the requirements. When the cold storage equipment is not used for a long time, the main power supply of the cold storage should be cut off, and the refrigeration unit should be protected from moisture, dust, and other substances.
There are several common reasons why the oil pressure difference controller alarms: 1.Insufficient refrigeration oil in the system causes insufficient oil level, causing the oil pump to be unable to absorb oil normally; 2.The oil in the system is too dirty, causing the filter of the oil pump to be clogged; 3.The relay of the oil pressure difference controller is not sensitive; 4.The oil pump itself fails and cannot absorb oil; 5.A large amount of refrigerant is mixed into the refrigeration oil, causing the oil pressure to be unable to be established; 6.The compressor has liquid return and there is too much liquid refrigerant in the crankcase; adjust the expansion valve and check the oil heating. 7.Crankcase oil temperature is too low
In addition to the drying and filtering work of the normal refrigeration system, the filter dryer also has an important function of cleaning the system after the compressor burns out.
If the diameter of the connecting pipe in the system is too large, the flow rate of the refrigerant in the pipe will become smaller under the same load and refrigerant amount, thereby reducing the oil-carrying capacity of the refrigerant and making it difficult to return oil.
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