Assessment Requirements for AURETU104 Diagnose and repair air conditioning and HVAC components

Release: 1

Assessment Requirements for AURETU104 Diagnose and repair air conditioning and HVAC components

Modification History

Release	Comments
Release 1	This version first released with AUR Automotive Retail, Service and Repair Training Package Version 6.0

Performance Evidence

The candidate must demonstrate the ability to complete the tasks outlined in the elements, performance criteria and foundation skills of this unit, including evidence of the ability to:

diagnose and repair a fault in the air conditioning and heating, ventilation and cooling (HVAC) systems of two different vehicles or machinery, in which the work must involve removing, refitting or replacing two of the following:

condenser

evaporator

expansion valve

compressor

heater box

remove, refit or replace two different types of refrigerant.

Knowledge Evidence

The candidate must be able to demonstrate knowledge to complete the tasks outlined in the elements, performance criteria and foundation skills of this unit, including knowledge of:

methods to locate and interpret information required to diagnose and repair air conditioning and HVAC systems, including:

information provided by customers and supervisors

air conditioning and HVAC system manufacturer specifications

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

workplace procedures required to diagnose and repair air conditioning and HVAC systems, including:

establishing the serviceability of tools and equipment

documentation procedures

housekeeping procedures, including:

examination of tools and equipment

storage of equipment

identification, tagging and isolation of faulty equipment

safe disposal of materials

recycling procedures

workplace health and safety (WHS) requirements relating to diagnosing and repairing air conditioning and HVAC systems, including procedures for:

working with refrigerants at boiling point given risk of frostbite

working with system lubricants, including carcinogenic oils

identifying refrigerant and oil type, including:

service decal sticker

testing refrigerant

types and location of service ports

handling, storing and transporting refrigerant cylinders and recovery cylinders, including:

pressure ratings

pressure relief devices

outlet connection type

selecting and using personal protective equipment (PPE)

emergency procedures and incident management requirements and procedures

handling flammable refrigerants

identifying and using fire safety equipment

procedures for recovering automotive refrigerant, including:

testing refrigerant to determine its type

connecting manifold and gauge set and recovery unit, including types and location of service ports

identifying recovery cylinder suitable to the refrigerant

operating recovery unit, including weighing recovery cylinder before and after recovery

disconnecting and storing recovery unit and cylinder

system performance testing, including:

using manifold gauges and thermometers to check system pressures and vent temperatures

checking blower fan output

checking engine fan output

checking filters

environmental requirements relating to servicing air conditioning and HVAC, including procedures for:

preventing loss of refrigerant to the atmosphere

handling materials and refrigerant recovery equipment

air conditioning and HVAC system principles, including:

heat transfer principles, including convection, conduction and radiation

functions of the following air conditioning components:

compressor

condenser

receiver-drier

evaporator

blower fan

refrigerant

functions of the following heating components:

radiator

thermostat

radiator and heater hoses

heater tap

heater box

single zone and multi-zone vehicle layouts

purpose and operation of air conditioning and HVAC systems and components, including:

high pressure and low pressure sides of air conditioning systems

compressors, including:

axial type, including variable capacity compressors

scroll type

vane type

electromagnetic clutches

condensers

receiver-dryer, including filters and desiccants

expansion valves, including capillary tube

evaporator

thermostat

refrigerants, including R12, R134, R1234yf and hydrocarbon refrigerants

compressor oils

air conditioner and heating controls, including levers and ducting

air conditioner and heating electrical circuits and sensors, including:

high and low pressure switches

pressure relief valves

temperature sensors

climate control systems

diagnostic testing procedures for air conditioning and HVAC systems, including:

accessing and interpreting scan tool system data, including:

diagnostic trouble codes (DTCs)

live data

freeze frame data

waveforms

using diagnostic flow charts

using manifold gauges on systems with different refrigerants, including analysis of high and low pressure readings in conjunction with temperature probes

testing electrical systems, including procedures for:

accessing electrical terminals and using test probes without damaging connectors, fuse holders or wiring

resistance and voltage drop tests

open and short circuit tests

checking shorts to signal, power circuits and grounds

repair procedures for air conditioning and HVAC systems, including procedures for:

using manifold gauges to discharge, evacuate and charge system refrigerants

removing and replacing system components

post-repair testing procedures for air conditioning and HVAC systems, including procedures for checking for:

refrigerant leaks

heater core and system water coolant leaks

ambient temperature

centre vent temperature

condenser and suction line temperature

manifold gauge pressure readings

static and dynamic performance tests of air conditioning and HVAC systems, including checking:

ambient temperature

vent temperature

condenser and suction line temperature

procedures for completing ARCtick service decal sticker, including:

name of service organisation

ARCtick business authority number

quantity of refrigerant added

refrigerant and oil type

service date

technician name and licence number.

Assessment Conditions

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

manufacturer specifications for air conditioning and HVAC systems

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

ARCtick service decal stickers

procedures for servicing and adjusting vehicle air conditioning and HVAC systems

two different vehicles or machinery with air conditioning and HVAC system faults

minimum of two different types of refrigerant

diagnosis and repair equipment for air conditioning and HVAC systems, including:

manifold and gauge set

recovery unit

vacuum pump

electronic leak detector

nitrogen cylinder and regulator

multimeter

electronic scales

oil injector

infra-red thermometer

temperature probe

scan tool.

Assessors of this unit must satisfy the requirements for assessors in applicable vocational education and training legislation, frameworks and/or standards; and hold an Australian Refrigerant Council (ARC) Refrigerant Handling licence.

Links

Companion Volume Implementation Guide is found on VETNet - https://vetnet.gov.au/Pages/TrainingDocs.aspx?q=b4278d82-d487-4070-a8c4-78045ec695b1