Which of the following is a recommended maintenance check for refrigeration compressors?

Analyzing suction and discharge pressures is a crucial maintenance check for refrigeration compressors because it provides vital information about the system's operational efficiency. By measuring these pressures, operators can assess whether the compressor is functioning within its specified range. If the suction pressure is too low or the discharge pressure is too high, it could indicate issues such as a refrigerant leak, compressor wear, or blockages in the system, all of which can lead to reduced performance and potential system failure.

Monitoring these pressures helps in diagnosing problems early, ensuring that the compressor operates efficiently, and maintaining the overall performance of the refrigeration system. Effective maintenance involves a comprehensive approach, not just focusing on refrigerant levels, fan blades, or electrical connections, which are all important but do not provide a complete picture of the compressor's operational health.