What problems will occur when the air-cooled chiller is in use, with solutions
In the process of using the chiller equipment, it is inevitable that they will encounter some common failures. Users need to understand the possible causes of the failures and make corresponding solutions in time to make the production operation more stable. So, what are the common failures of chillers?
Small temperature difference between inlet and outlet water
When the user encounters a small temperature difference between the inlet and outlet water when using the chiller, the general reasons are as follows.
First, the output of the chiller is small, for example, the unit itself is faulty, or it is not fully loaded, etc. The industry suggests that under these conditions, users can make preliminary judgments by observing the operating current of the chiller and other parameters.
Second, the heat transfer effect of the equipment is not good. For example, the heat transfer tube has serious scale and affects the heat transfer of the chiller. The user can judge by observing the heat transfer temperature difference between the water temperature and the evaporation temperature.
Third, if the water flow is too large, the user can make judgments by observing the pressure difference between the inlet and outlet water of the evaporator and the running current of the water pump. In addition, if the above problems are eliminated, the user can check whether the sensor or temperature gauge is accurate.
Communication failure
It is understood that the computer controller controls each module through the communication line and the main interface board. The main cause of communication failure is poor contact or open circuit of the communication line, especially the poor contact caused by the interface being damp and oxidized. Failure of the unit electronic board or the total interface board, improper selection of the address dial switch, and power failure can cause communication failures.
High voltage failure
When the discharge pressure of the compressor is too high, it is easy to cause the high-pressure protection relay to act. If the pressure is too high for a long time, it will cause the compressor to run too much current, easily burn the motor, and easily damage the compressor exhaust valve.
So, under what circumstances will a high-pressure fault occur? Mainly include: high cooling water temperature, poor condensation effect; insufficient cooling water flow, unable to reach the rated water flow; condenser scaling or clogging; excessive refrigerant charge; refrigeration Non-condensable gases such as air and nitrogen are mixed in the agent; false alarms caused by electrical faults.
Low voltage fault
When the compressor suction pressure is too low, it will cause the low-pressure protection relay to act. It is understood that the causes of low-pressure faults are: insufficient refrigerant or leakage; insufficient refrigerant water flow; clogged evaporator and poor heat exchange; electrical faults cause false alarms; low outside temperature.
In addition to understanding the causes of the above failures, users usually need to pay attention to the maintenance and maintenance of the equipment after using the chiller in order to ensure the extended life of the equipment and stable operation.
