Which item should be checked before use to prevent issues with recovered refrigerants?

• A. Oil level
• B. Power supply
• C. Ambient temperature
• D. Vacuum gauge

Answer: (A)

Oil level is crucial because the compressor must be properly lubricated when a system is charged with recovered refrigerant. If the oil level is low, the compressor can overheat, wear bearings, or even seize when the refrigerant is reintroduced, leading to equipment damage and poor performance. Checking and correcting the oil level before reuse helps ensure the compressor runs smoothly and that the recovered refrigerant remains properly circulated. The other options don’t relate as directly to safeguarding the compressor and refrigerant during reuse: power supply is about enabling operation, ambient temperature isn’t a direct factor for this step, and a vacuum gauge is used during evacuation to remove moisture, not to prevent issues with the recovered refrigerant itself.