Common faults and solutions for chillers in use

　　In the pharmaceutical and other industrial fields, chillers play a key role With the continuous development of the pharmaceutical industry, the chiller market also has a good space for development Data show that China's chiller market capacity at an annual rate of 8% continue to increase, and the proportion of domestic chiller market share increased year by year, the import replacement process is expected to accelerate
At the same time, chillers are facing new requirements in terms of quality, stability and so on It is understood that the current cold water machine industry in China is moving towards intelligent, energy-saving, humanization and unit integration direction, the relevant chiller manufacturers are also constantly exploring and improving, updating equipment and technology, to help the pharmaceutical and other industries better development
The author also learned that in the process of using chiller equipment, it is inevitable to encounter some common failures, the user needs to grasp the cause of the failure may appear, timely to make the corresponding solutions, in order to make production operation more stable So what are the common failures of chillers?
In and out of the water temperature difference is small When the user uses cold water opportunity to in and out of the water temperature difference is small, the general reasons are the following First, the output of the chiller is small, such as the unit itself has a fault, or not fully loaded Industry recommendations, in these cases, users can observe the chiller operating current and other parameters to make a preliminary judgment; In addition, the user can check the sensor or the temperature gauge for accuracy after the above problems have been ruled out
Communication failure It is understood that the control of the computer controller on each module is achieved through the communication line and the main interface board, the main cause of communication failure is poor communication line contact or broken circuit, especially the interface by moisture oxidation caused by poor contact, in addition Unit electronic board or total interface board failure, address dial switch selection is not appropriate, power failure can cause communication failure
High-voltage fault When the exhaust pressure of the compressor is too high, it is easy to cause the action of the high-voltage protection relay If the long-term pressure is too high, will cause the compressor operating current is too large, easy to burn the motor, but also easy to cause damage to the compressor exhaust port valve
So, when does a high-voltage fault occur back? Mainly includes: high cooling water temperature, poor condensation effect, insufficient cooling water flow, not up to rated water flow, condenser fouling or blockage, excessive refrigerant filling, refrigerant mixed with air, nitrogen and other non-condensing gases, electrical fault caused by false positives
Low voltage failure When the compressor suction pressure is too low, it will cause the low pressure protection relay action It is understood that the causes of low-pressure failure are: insufficient refrigerant or leakage, insufficient refrigerant water flow, evaporator blockage, poor heat exchange, electrical failure caused by false positives, low outside temperature
In addition to this need to understand the above causeof failure, users usually after the use of chillers, but also pay attention to the maintenance and maintenance of equipment, in order to ensure that the life of the equipment extended, stable operation.