Checking should include
- using electronic tools and visual inspection
- verifying contamination of the HVAC system
- determining any needed action.
ASE 2: VI. Heating, Ventilation, and Air Conditioning: E. Refrigerant Recovery, Recycling, and Handling
Process/Skill Questions:
- What failure does metal in the oil indicate?
- What dangerous contaminants can be found in refrigerant?