The hot summer is also the season of high and low temperature test chamber failures, which is mainly manifested in the overpressure alarm of the equipment. Because the ambient temperature of the equipment installation is too high, we recommend the use of a temperature of +25 degrees or so. Of course, it is impossible. Each customer can guarantee that the use environment of the cryogenic chamber is so perfect, so the problem is not too large from +5 degrees to +35 degrees, but when the temperature is too high, it is very easy to cause the phenomenon of overpressure. .

How can we keep the ambient temperature of the high and low temperature chambers better? Conditional customers can use air conditioners to keep the high and low temperature chambers in air-conditioned rooms. However, regardless of the location, the air circulation around the high-low temperature test chamber must be maintained. The distance between the front, rear, left and right sides and other objects or walls should be greater than 60 cm so that it can have better heat dissipation function. , you need to install the exhaust pipe, direct the hot air directly to the outside, regular maintenance, ensure the trouble-free operation of the exhaust motor.

Second, the overpressure alarm caused by the condenser fan in the cooling system of the high and low temperature test chamber does not turn or the speed of the aging is slow or the temperature of the sensor is invalid. The refrigeration system is composed of compressors, condensers, evaporators, drying filters, expansion valves, storage bottles, and other refrigeration components. When the condenser fan fails or is damaged, the pressure in the compressor rises instantaneously, causing super Pressure alarm; if the temperature sensor stick of the compressor fails, it will cause an illusion of overpressure.

Third, the lack of refrigerant in the cascade refrigeration system or instantaneous damage to the compressor can cause overpressure in the refrigeration system.
When one of the refrigerants in the cascade refrigeration system leaks, an alarm phenomenon will occur at this time, but please do not blindly add the refrigerant. You should ask a competent qualified maintenance and repair organization like Dongguan Saisi. Check whether there are leaks in the pipeline, and then fill in the pressure after the pressure, vacuum and other steps before adding the right amount of the same type of refrigerant. An overpressure alarm may also occur when one of the compressors is momentarily damaged.

The above three phenomena are the common phenomenon of high temperature and low temperature test cases for overpressure alarms. In addition, there are more reasons such as circuit failures, control system failures, etc., all requiring on-site inspection by the engineering personnel.

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