During a controlled refrigeration pressure test, pressure falls after temperature effects have been accounted for. No leak location has yet been identified. What is the next diagnostic task?
- ADeclare that the compressor is certainly the leak source.
- BDeclare every joint sound because none is visibly wet.
- Use an appropriate leak-location method on the circuit.
- DChoose a leak detector solely by a universal sensitivity ranking.
Where to look it up
Explicit exercise assumptions; not a universal code requirement.
Why C is correct
The test indicates a loss that requires localization. It does not locate the fault or establish one detector technology as best for every refrigerant and environment.