Final answer:
System-dependent recovery equipment cannot be used when the appliance contains over 15 pounds of refrigerant, even if other conditions such as leaks, temperature, or compressor functionality are within permissible limits.
Step-by-step explanation:
System-dependent recovery equipment cannot be used when the appliance contains over 15 pounds of refrigerant. Such equipment is designed to work with the compressor of the appliance to recover refrigerant. However, if the appliance is leaking, the ambient temperature is over 115 degrees Fahrenheit, or the appliance has a functional compressor, system-dependent recovery equipment can typically still be used, provided other conditions meet the requirements for safe and effective operation. It's important to note that using this equipment when the appliance contains more than 15 pounds of refrigerant would not adhere to regulations and best practices.