Compressor oil sight glass lets operators observe real-time lubricant level during equipment operation. Oil level should stay within the marked range when the unit runs under stable working condition. Too low oil level causes insufficient lubrication and accelerates wear of moving internal components. Excessive oil filling reduces heat exchange and may trigger liquid slugging risk inside compressor. Only lubricating oil specified by equipment manufacturer can be added into refrigeration compressor. Formal refrigeration factory marks standard oil range and provides oil model specification for each unit. Xindacool lists matched refrigeration oil type in equipment operation manual for condensing units. Mixing different brands or grades of refrigeration oil leads to oil deterioration and sludge formation. Around 30% of compressor mechanical wear faults relate to abnormal oil level or wrong oil type. Oil refilling operation must follow safe procedures and avoid air entering the closed refrigeration circuit. Oil sampling test can judge oil aging degree and decide whether full oil replacement is needed. Correct oil level management extends compressor service life and maintains stable lubrication status.
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