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Evidence Guide: AURETU007 - Overhaul air conditioning and HVAC system compressors

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

AURETU007 - Overhaul air conditioning and HVAC system compressors

What evidence can you provide to prove your understanding of each of the following citeria?

Prepare to dismantle air conditioning compressor

  1. Job requirements are determined from workplace instructions
  2. Australian automotive code of practice: Control of refrigerant gases during manufacture, installation, servicing or de-commissioning of motor vehicle air conditioners is sourced and interpreted
  3. Dismantling information is sourced and interpreted
  4. Dismantling options are analysed and those most appropriate to the circumstances are selected
  5. Hazards associated with the work are identified and risks are managed
  6. Dismantling tools and equipment are selected and checked for serviceability
Job requirements are determined from workplace instructions

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Dismantling information is sourced and interpreted

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Dismantling options are analysed and those most appropriate to the circumstances are selected

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Hazards associated with the work are identified and risks are managed

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Dismantling tools and equipment are selected and checked for serviceability

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Dismantle and evaluate compressor and components

  1. Compressor is dismantled in a logical sequence according to manufacturer and workplace procedures, and safety and environmental requirements,and without causing unnecessary damage to components or systems
  2. Components are cleaned for evaluation according to workplace procedures and safety and environmental requirements
  3. Components are measured and compared with manufacturer specifications and serviceability is determined
  4. Component repair method is determined
  5. Unserviceable parts are identified and replacement parts sourced
Compressor is dismantled in a logical sequence according to manufacturer and workplace procedures, and safety and environmental requirements,and without causing unnecessary damage to components or systems

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Components are cleaned for evaluation according to workplace procedures and safety and environmental requirements

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Components are measured and compared with manufacturer specifications and serviceability is determined

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Component repair method is determined

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Unserviceable parts are identified and replacement parts sourced

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Carry out overhaul

  1. Overhaul information is sourced and interpreted
  2. Overhaul options are analysed and those most appropriate to the circumstances are selected
  3. Overhaul tools and equipment are selected and checked for serviceability
  4. Components are machined, repaired and replaced as required, and adjustments are carried out according to manufacturer specifications, workplace procedures, safety and environmental requirements, and Australian automotive code of practice
Overhaul information is sourced and interpreted

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Overhaul options are analysed and those most appropriate to the circumstances are selected

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Overhaul tools and equipment are selected and checked for serviceability

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Components are machined, repaired and replaced as required, and adjustments are carried out according to manufacturer specifications, workplace procedures, safety and environmental requirements, and Australian automotive code of practice

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assemble compressor and components

  1. Compressor is assembled according to manufacturer specifications, workplace procedures, and safety and environmental requirements
  2. Tolerances and clearances are measured against manufacturer specifications and necessary adjustments are made
  3. Assembly of compressor is completed within workplace timeframes and without causing damage to other components or systems
  4. Post-assembly testing is carried out according to workplace procedures and safety and environmental requirements, and any problems detected as having been introduced during the assembly process are rectified
Compressor is assembled according to manufacturer specifications, workplace procedures, and safety and environmental requirements

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Tolerances and clearances are measured against manufacturer specifications and necessary adjustments are made

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assembly of compressor is completed within workplace timeframes and without causing damage to other components or systems

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Post-assembly testing is carried out according to workplace procedures and safety and environmental requirements, and any problems detected as having been introduced during the assembly process are rectified

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Complete work processes

  1. Final inspection is made to ensure work is to workplace expectations and compressor is presented ready for use or storage
  2. Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
  3. Tools and equipment are checked and stored, and any faulty electrical equipment is identified, tagged and isolated according to workplace procedures
  4. Workplace documentation is processed according to workplace procedures
Final inspection is made to ensure work is to workplace expectations and compressor is presented ready for use or storage

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Tools and equipment are checked and stored, and any faulty electrical equipment is identified, tagged and isolated according to workplace procedures

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Workplace documentation is processed according to workplace procedures

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Prepare to dismantle air conditioning compressor

  1. Job requirements are determined from workplace instructions
  2. Australian automotive code of practice: Control of refrigerant gases during manufacture, installation, servicing or de-commissioning of motor vehicle air conditioners is sourced and interpreted
  3. Dismantling information is sourced and interpreted
  4. Dismantling options are analysed and those most appropriate to the circumstances are selected
  5. Hazards associated with the work are identified and risks are managed
  6. Dismantling tools and equipment are selected and checked for serviceability
Job requirements are determined from workplace instructions

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Dismantling information is sourced and interpreted

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Dismantling options are analysed and those most appropriate to the circumstances are selected

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Hazards associated with the work are identified and risks are managed

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Dismantling tools and equipment are selected and checked for serviceability

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Dismantle and evaluate compressor and components

  1. Compressor is dismantled in a logical sequence according to manufacturer and workplace procedures, and safety and environmental requirements,and without causing unnecessary damage to components or systems
  2. Components are cleaned for evaluation according to workplace procedures and safety and environmental requirements
  3. Components are measured and compared with manufacturer specifications and serviceability is determined
  4. Component repair method is determined
  5. Unserviceable parts are identified and replacement parts sourced
Compressor is dismantled in a logical sequence according to manufacturer and workplace procedures, and safety and environmental requirements,and without causing unnecessary damage to components or systems

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Components are cleaned for evaluation according to workplace procedures and safety and environmental requirements

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Components are measured and compared with manufacturer specifications and serviceability is determined

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Component repair method is determined

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Unserviceable parts are identified and replacement parts sourced

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Carry out overhaul

  1. Overhaul information is sourced and interpreted
  2. Overhaul options are analysed and those most appropriate to the circumstances are selected
  3. Overhaul tools and equipment are selected and checked for serviceability
  4. Components are machined, repaired and replaced as required, and adjustments are carried out according to manufacturer specifications, workplace procedures, safety and environmental requirements, and Australian automotive code of practice
Overhaul information is sourced and interpreted

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Overhaul options are analysed and those most appropriate to the circumstances are selected

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Overhaul tools and equipment are selected and checked for serviceability

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Components are machined, repaired and replaced as required, and adjustments are carried out according to manufacturer specifications, workplace procedures, safety and environmental requirements, and Australian automotive code of practice

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assemble compressor and components

  1. Compressor is assembled according to manufacturer specifications, workplace procedures, and safety and environmental requirements
  2. Tolerances and clearances are measured against manufacturer specifications and necessary adjustments are made
  3. Assembly of compressor is completed within workplace timeframes and without causing damage to other components or systems
  4. Post-assembly testing is carried out according to workplace procedures and safety and environmental requirements, and any problems detected as having been introduced during the assembly process are rectified
Compressor is assembled according to manufacturer specifications, workplace procedures, and safety and environmental requirements

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Tolerances and clearances are measured against manufacturer specifications and necessary adjustments are made

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assembly of compressor is completed within workplace timeframes and without causing damage to other components or systems

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Post-assembly testing is carried out according to workplace procedures and safety and environmental requirements, and any problems detected as having been introduced during the assembly process are rectified

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Complete work processes

  1. Final inspection is made to ensure work is to workplace expectations and compressor is presented ready for use or storage
  2. Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
  3. Tools and equipment are checked and stored, and any faulty electrical equipment is identified, tagged and isolated according to workplace procedures
  4. Workplace documentation is processed according to workplace procedures
Final inspection is made to ensure work is to workplace expectations and compressor is presented ready for use or storage

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Tools and equipment are checked and stored, and any faulty electrical equipment is identified, tagged and isolated according to workplace procedures

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Workplace documentation is processed according to workplace procedures

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

Elements

Elements describe the essential outcomes.

Performance Criteria

Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold and italicised text is used, further information is detailed in the range of conditions section.

1. Prepare to dismantle air conditioning compressor

1.1 Job requirements are determined from workplace instructions

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

1.3 Dismantling information is sourced and interpreted

1.4 Dismantling options are analysed and those most appropriate to the circumstances are selected

1.5 Hazards associated with the work are identified and risks are managed

1.6 Dismantling tools and equipment are selected and checked for serviceability

2. Dismantle and evaluate compressor and components

2.1 Compressor is dismantled in a logical sequence according to manufacturer and workplace procedures, and safety and environmental requirements,and without causing unnecessary damage to components or systems

2.2 Components are cleaned for evaluation according to workplace procedures and safety and environmental requirements

2.3 Components are measured and compared with manufacturer specifications and serviceability is determined

2.4 Component repair method is determined

2.5 Unserviceable parts are identified and replacement parts sourced

3. Carry out overhaul

3.1 Overhaul information is sourced and interpreted

3.2 Overhaul options are analysed and those most appropriate to the circumstances are selected

3.3 Overhaul tools and equipment are selected and checked for serviceability

3.4 Components are machined, repaired and replaced as required, and adjustments are carried out according to manufacturer specifications, workplace procedures, safety and environmental requirements, and Australian automotive code of practice

4. Assemble compressor and components

4.1 Compressor is assembled according to manufacturer specifications, workplace procedures, and safety and environmental requirements

4.2 Tolerances and clearances are measured against manufacturer specifications and necessary adjustments are made

4.3 Assembly of compressor is completed within workplace timeframes and without causing damage to other components or systems

4.4 Post-assembly testing is carried out according to workplace procedures and safety and environmental requirements, and any problems detected as having been introduced during the assembly process are rectified

5. Complete work processes

5.1 Final inspection is made to ensure work is to workplace expectations and compressor is presented ready for use or storage

5.2 Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected

5.3 Tools and equipment are checked and stored, and any faulty electrical equipment is identified, tagged and isolated according to workplace procedures

5.4 Workplace documentation is processed according to workplace procedures

Required Skills and Knowledge

Elements

Elements describe the essential outcomes.

Performance Criteria

Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold and italicised text is used, further information is detailed in the range of conditions section.

1. Prepare to dismantle air conditioning compressor

1.1 Job requirements are determined from workplace instructions

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

1.3 Dismantling information is sourced and interpreted

1.4 Dismantling options are analysed and those most appropriate to the circumstances are selected

1.5 Hazards associated with the work are identified and risks are managed

1.6 Dismantling tools and equipment are selected and checked for serviceability

2. Dismantle and evaluate compressor and components

2.1 Compressor is dismantled in a logical sequence according to manufacturer and workplace procedures, and safety and environmental requirements,and without causing unnecessary damage to components or systems

2.2 Components are cleaned for evaluation according to workplace procedures and safety and environmental requirements

2.3 Components are measured and compared with manufacturer specifications and serviceability is determined

2.4 Component repair method is determined

2.5 Unserviceable parts are identified and replacement parts sourced

3. Carry out overhaul

3.1 Overhaul information is sourced and interpreted

3.2 Overhaul options are analysed and those most appropriate to the circumstances are selected

3.3 Overhaul tools and equipment are selected and checked for serviceability

3.4 Components are machined, repaired and replaced as required, and adjustments are carried out according to manufacturer specifications, workplace procedures, safety and environmental requirements, and Australian automotive code of practice

4. Assemble compressor and components

4.1 Compressor is assembled according to manufacturer specifications, workplace procedures, and safety and environmental requirements

4.2 Tolerances and clearances are measured against manufacturer specifications and necessary adjustments are made

4.3 Assembly of compressor is completed within workplace timeframes and without causing damage to other components or systems

4.4 Post-assembly testing is carried out according to workplace procedures and safety and environmental requirements, and any problems detected as having been introduced during the assembly process are rectified

5. Complete work processes

5.1 Final inspection is made to ensure work is to workplace expectations and compressor is presented ready for use or storage

5.2 Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected

5.3 Tools and equipment are checked and stored, and any faulty electrical equipment is identified, tagged and isolated according to workplace procedures

5.4 Workplace documentation is processed according to workplace procedures

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.

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.

Range Statement

This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.

Safety and environmental requirements must include:

work health and safety (WHS) and occupational health and safety (OHS) requirements, 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 fire safety equipment

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