When using a passive system-dependent recovery method on an appliance with an operating compressor, what action should be taken?

• A. Run the appliance's compressor and recover the refrigerant from the low side.
• B. Run the appliance's compressor and recover the refrigerant from the high side.
• C. Stop the compressor and recover the refrigerant from the low side.
• D. Run the compressor but do not recover refrigerant.

Answer: (B)

Passive system-dependent recovery relies on the appliance’s own compressor to move refrigerant out of the system. Since the high-pressure side is where the refrigerant is pressurized and pushed toward the condenser, the correct approach is to keep the compressor running and connect to the high side so the refrigerant is driven into the recovery cylinder. Recovering from the low side wouldn’t have the same driving pressure and could complicate the process, stopping the compressor would remove the moving force, and simply running without recovering would not fulfill the method. So, run the appliance’s compressor and recover from the high side.