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The compressor is the \"heart\" of a chiller unit; even minor problems with it can lead to symptoms such as excessive exhaust temperature and oil leakage. Therefore, if its condition is not carefully monitored during long-term operation, its internal components will age and get damaged, resulting in a shortened lifespan. Therefore, we must carefully examine its symptoms and apply the appropriate treatment. If the exhaust temperature is too high, it is necessary to identify the cause. Common reasons include a high temperature of the cooling water, poor condensation efficiency, insufficient flow rate of the circulating water – failing to reach the specified flow rate – contamination or blockage of the condenser, insufficient amount of refrigerant or presence of gases within it. An increased gap at the exhaust end of the screw rotor or an enlarged gap inside the compressor can also lead to a high exhaust temperature. If these issues are not resolved promptly, the unit will not be able to start. If oil leakage occurs, the common causes are a low cooling water temperature, insufficient exhaust superheat, incomplete separation of oil from the refrigerant, and the mixture entering the heat exchanger, which results in low pressure in the unit. If this issue is not resolved promptly, it may cause the expansion valve to become clogged and prevent the unit from starting. This is when the importance of regular maintenance for compressors becomes apparent. As for why compressors need to undergo \"preventive maintenance,\" the answer is to prevent problems before they occur! Don’t let the compressor signal for help on its own – by that point it may already be severely damaged. For the sake of the compressor’s health, we have to carry out what are known as major repairs, which are time-consuming, labor-intensive, and costly; moreover, the shutdown of the compressor can result in significant losses. So why not carry out regular preventive maintenance on the compressor to avoid risks such as downtime, and to prevent issues like excessive exhaust temperature and oil leakage that can lead to a decline in its performance. When should regular “preventive refurbishment and maintenance” be carried out? Generally, in accordance with the manufacturer’s guidelines, the refrigerant is tested and analyzed annually, and replaced based on the results. The oil filter is inspected every 3 months, and a decision is made regarding whether to replace it based on the inspection results. The suction filter is cleaned once a year, the airtightness of the refrigeration system is checked annually, and the quality of the lubricating oil is analyzed annually; if its quality declines, replacement is recommended. Vibration is analyzed every six months, and if the vibration level increases, the frequency of monitoring needs to be increased. Open-type motors, including their bearings, are maintained every three years. Proper regular maintenance can keep the machine’s performance at its best, ensuring it displays its optimal qualities. Gonglenghui offers you \"preventive refurbishment and major maintenance services for compressors\", helping you save on the high costs associated with repairs and operational disruptions caused by compressor failures, and protecting your valuable assets from damage.