The cause of the high-pressure failure of the high-temperature chiller of the ultra-low temperature equipment

What is the main cause of high-pressure failure of high-temperature chillers in ultra-low temperature equipment? Refrigerant is overcharged.
this situation generally occurs after maintenance, the performance of suction exhaust pressure, balance pressure are high, compressor operating current is also high.
: Refrigerant should be released according to the suction and balancing pressure and operating current at rated operating conditions until normal.
cooling water temperature is high, the condensation effect is not good.
the refrigeration machine requires the rated operating conditions of 30 to 35 degrees C, high water temperature, poor heat dissipation, will inevitably lead to high condensation pressure, this phenomenon often occurs in the high temperature season.
Solution: The cause of high water temperature may be cooling tower failure, such as the fan does not open or even reverse, the water is not turned, the performance of cooling water temperature is very high, and rapidly rising;
the cooling water flow is insufficient to reach the rated water flow.
the main performance of the unit in and out of the water pressure difference becomes smaller, the temperature difference becomes large.
solution: pipe filter blocked or selected too fine, limited permeable capacity, should choose a suitable filter and regularly clean the filter;
condenser scales or clogs.
Condensate is generally used with tap water, in more than 30 degrees C is easy to scale, and because the cooling tower is open, directly exposed to air, dust foreign objects can easily enter the cooling water system, resulting in condenser dirty blocking, heat exchange area is small, low efficiency, but also affect water flow.
its performance is the unit in and out of the water pressure difference, temperature difference becomes erred, with the hand to touch the condenser up and down the temperature is very high, condenser out of the copper pipe hot hand.
: the unit should be re-flushed regularly and chemically cleaned and descaled if necessary.
false positives caused by an electrical fault.
the unit electronic board is moistureed or damaged due to moisture, poor contact or damage to the high-voltage protection relay, and communication failure causes false positives.
solution: This false fault, often the HP fault indicator on the electronic board is not on or off, the manual reset of the high-voltage protection relay is invalid, the compressor operating current is normal, the suction and exhaust pressure is normal.
these are some of the factors that can cause high-pressure failure of the freezer, I hope you can take care to avoid these problems in later use.