Assessment Requirements for AURETU007 Overhaul air conditioning and HVAC system compressors

Release: 1

Assessment Requirements for AURETU007 Overhaul air conditioning and HVAC system compressors

Modification History

Release	Comment
Release 1	New unit of competency.

Performance Evidence

Before competency can be determined, individuals must demonstrate they can perform the following according to the standards defined in this unit’s elements, performance criteria, range of conditions and foundation skills:

overhaul the air conditioning compressors of two different vehicles or machinery, including:

piston, scroll and rotary vane compressors

electric compressors

variable displacement compressors

clutchless compressors

recover and evacuate refrigerants according to required code of practice and regulations, and recharge the system with the appropriate manufacturer refrigerant and oil type.

Knowledge Evidence

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS) and occupational health and safety (OHS) requirements relating to overhauling air conditioning and heating, ventilation and air conditioning (HVAC) system components, including procedures for:

working with refrigerants at boiling point given risk of frostbite

working with system lubricants, including carcinogenic oils

handling flammable refrigerants

using personal protective equipment (PPE)

identifying and using fire safety equipment

environmental requirements, including procedures for preventing loss of refrigerant to the atmosphere

techniques for reading and interpreting technical information, including:

refrigerant saturation temperatures in relation to ambient temperatures and changing levels of humidity

graphic symbols and diagrams

principal types of vehicle air conditioning and HVAC systems, including:

piston, scroll and rotary vane compressors

electric compressors

variable displacement compressors

clutchless compressors

principal refrigerant types and their respective operating pressures and lubricating oils, including:

R12

R134a

R1234yf

air conditioning and HVAC system component overhaul procedures, including:

methods for cleaning and preparing air conditioning and HVAC system compressor for overhaul

air conditioning and HVAC system compressor dismantling procedures

air conditioning and HVAC system compressor inspection, measuring and evaluation procedures, including methods for measuring and calculating tolerances and clearances

air conditioning and HVAC compressor repair and adjustment procedures, including:

piston, scroll and rotary vane compressors

electric compressors

variable displacement compressors

clutchless compressors

procedures for tolerance measuring and calculating and adjusting components

post-overhaul bench testing procedures, including:

use of manifold gauges and surface probe thermocouples for complete system analysis

analysis of system operation while using gauges, temperature probes, electrical test equipment, scan tools, oscilloscopes and other industry-relevant test equipment

post-overhaul testing of air conditioning and HVAC systems in vehicle or machinery, including:

diagnostic procedures for air conditioning and HVAC systems, including:

accessing and interpreting diagnostic trouble codes (DTCs)

diagnostic flow charts

visual, aural and functional assessments

ambient temperature

centre vent temperature

condenser and suction line temperature

manifold gauge pressure readings

refrigerant leaks.

Assessment Conditions

Assessors must satisfy NVR/AQTF assessor requirements and hold an Australian Refrigerant Council (ARC) Refrigerant Handling licence.

Competency is to be assessed in the workplace or a simulated environment that accurately reflects performance in a real workplace setting.

Assessment must include direct observation of tasks.

Where assessment of competency includes third-party evidence, individuals must provide evidence that links them to the air conditioning and HVAC systems that they have worked on, e.g. repair orders.

Assessors must verify performance evidence through questioning on skills and knowledge to ensure correct interpretation and application.

The following resources must be made available:

automotive repair workplace or simulated workplace

workplace instructions

Australian automotive code of practice: Control of refrigerant gases during manufacture, installation, servicing or de-commissioning of motor vehicle air conditioners.

manufacturer specifications for air conditioning and HVAC system components

two different vehicles or machinery requiring overhaul, with operational air conditioning and HVAC systems and with components specified in the performance evidence

tools, equipment and materials appropriate for overhauling and adjusting a range of air conditioning and HVAC compressors.

Links

Companion Volume implementation guides are found in VETNet - https://vetnet.gov.au/Pages/TrainingDocs.aspx?q=b4278d82-d487-4070-a8c4-78045ec695b1

Companion Volume implementation guides are found in VETNet - https://vetnet.gov.au/Pages/TrainingDocs.aspx?q=b4278d82-d487-4070-a8c4-78045ec695b1