Hazardous situation which can result in moderate injury or death. Though the discharge process is demonstrated with a screwdriver, use an appropriately-rated capacitor discharge tool.

The terminals have stamps on the metal that indicate which terminal is which. One is labeled "C" for "common," the next is labeled "Fan," and the last one is labeled "Hum" for the compressor.

Use the capacitor discharge tool to bridge the gap between the terminals labeled "Hum" (Compressor) and "common" (ground). This will discharge any stored electricity in the capacitance meter to prevent any damage to you and your capacitor meter.

Repeat the process with the "fan" terminal and the "common" terminal.