Is the Trane 500 refrigeration ton CVHE or CVHG? It is a 3-stage centrifuge. Check the CH530 panel of your unit to see if there is an alarm display. If there is an alarm, it is recommended to contact Trane for repair. Trane's centrifugal unit uses unique patented technology. The entire unit is in a negative pressure state. Once surge occurs, there are several situations: 1. The unit is leaking. This situation can be observed by checking the exhaust device. There is a report about exhaust in the report section of the panel. It has a daily exhaust minute limit. If it exceeds, an alarm will be issued. If this situation occurs, it will be very serious. Unfortunately, your crew needs to pick up leaks, 2. The approach temperature of the refrigerant evaporator is high. The approach temperature is the temperature difference between the refrigerant and the refrigerated cooling water. If the temperature difference is too high, it means that the heat transfer effect of your unit becomes poor, which will also cause the Trane unit to wear out. , the approach temperature can also be seen in the condenser evaporator report in the report column. When it reaches 5 degrees Celsius, it needs to be cleaned. 3. Water enters the unit. It can be observed from the sight glass at the filter under the exhaust device that wet and dry are abbreviated in English and have corresponding colors, which is easy to see. This situation is the most troublesome. It is recommended that you find the Trane office in your city to solve the problem