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1. Replace the compressor lubricant based on the operating time of the screw chiller. The main functions of lubricant in a compressor are lubrication, cooling, and capacity control. It is recommended to check the cleanliness of the lubricant in screw-type chillers every 10,000 hours of operation. 2. Establish rules and regulations for the cleaning and maintenance of screw chillers, and keep records of each maintenance task performed. When cleaning the unit, it is not just a matter of cleaning its exterior; what’s more important is to clean the evaporator, condenser, pipes, filters, cooling tower, and fans of the screw-type chiller on an annual basis, so as to prevent impurities in the water from causing scaling and affecting the proper operation of the chiller. 3. When using a screw chiller, the operator should always pay attention to its operation. If the chiller emits abnormal noises or experiences any faults, it is essential to shut it down promptly to prevent further damage to the unit. Furthermore, troubleshoot the issues based on the error messages displayed on the control panel of the screw chiller; remember not to start the chiller until the faults have been resolved. 4. Operators of screw chillers should regularly record various data related to the unit’s operation, to facilitate future reference. After long-term use, it is necessary to inspect all components of the screw chiller to ensure they are functioning properly. When a screw chiller is not needed to operate for an extended period of time, the water inside the unit and in the pipes should be drained to prevent damage to the unit’s components.