If you find the pressure of a refrigeration system containing a Class I or Class II refrigerant to be opened for the accomplishment of repairs is 0 psig, what must be done?

Correct Answer: Option C — do not attempt to recover any refrigerant and repair the leak before pulling a vacuum on the system

At 0 psig, no recoverable liquid or vapor remains in the system under atmospheric pressure equilibrium. EPA regulations and standard marine practice dictate proceeding directly to leak repair and deep vacuum dehydration before recharging.