How do you check the input of a compressor?

To check the input of a compressor, start by ensuring that the power supply is connected and operational. Use a multimeter to measure the voltage at the input terminals, confirming it matches the specified requirements. Additionally, inspect the input pipes for any blockages or leaks, and verify that the compressor is receiving the correct flow rate of the working fluid. Finally, listen for any unusual noises during operation, as they can indicate issues with the compressor's function.