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Evidence Guide: AURETU004 - Diagnose and repair air conditioning and HVAC systems

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

 

AURETU004 - Diagnose and repair air conditioning and HVAC systems

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

Prepare to diagnose and repair air conditioning and HVAC system

  1. Job requirements are determined from workplace instructions
  2. Diagnostic information is sourced and interpreted
  3. Diagnostic options are analysed and those most appropriate to the circumstances are selected
  4. Hazards associated with the work are identified and risks are managed
  5. Diagnostic tools and equipment are selected and checked for serviceability
Job requirements are determined from workplace instructions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Diagnostic information is sourced and interpreted

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Diagnostic 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:

 

 

 

 

 

 

 

Diagnostic tools and equipment are selected and checked for serviceability

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Diagnose air conditioning and HVAC system

  1. Diagnostic tests are carried out according to workplace proceduresand safety and environmental requirements using appropriate tools and techniques without causing damage to components or system
  2. Faultsare identified from diagnostic test results and causes of faults are determined
  3. Diagnosis findings and recommendations for necessary repairs or adjustments are reported according to workplace procedures
Diagnostic tests are carried out according to workplace proceduresand safety and environmental requirements using appropriate tools and techniques without causing damage to components or system

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Faultsare identified from diagnostic test results and causes of faults are determined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Diagnosis findings and recommendations for necessary repairs or adjustments are reported according to workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Repair air conditioning and HVAC system

  1. Repair information is sourced and interpreted
  2. Repair options are analysed and those most appropriate to the circumstances are selected
  3. Repair tools, equipment and materials are selected and checked according to manufacturer specifications and workplace procedures
  4. Repairs and component replacements and adjustments are carried out according to requirements, and without causing damage to components or systems
  5. System is recharged with the appropriate refrigerant gas according to manufacturer specifications and workplace procedures
  6. Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair process are rectified
Repair information is sourced and interpreted

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Repair tools, equipment and materials are selected and checked according to manufacturer specifications and workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Repairs and component replacements and adjustments are carried out according to requirements, and without causing damage to components or systems

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

System is recharged with the appropriate refrigerant gas according to manufacturer specifications and workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair process are rectified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete work processes

  1. Final inspection is made to ensure work is to workplace expectations and the vehicle or machinery is presented ready for use
  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 faulty electrical equipment is identified, tagged and isolated according to workplace procedures
  4. Australian Refrigeration Council accredited service decal sticker (ARCtick) and other required workplace documentation are completed and processed according to workplace procedures
Final inspection is made to ensure work is to workplace expectations and the vehicle or machinery is presented ready for use

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 faulty electrical equipment is identified, tagged and isolated according to workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Australian Refrigeration Council accredited service decal sticker (ARCtick) and other required workplace documentation are completed and processed according to workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare to diagnose and repair air conditioning and HVAC system

  1. Job requirements are determined from workplace instructions
  2. Diagnostic information is sourced and interpreted
  3. Diagnostic options are analysed and those most appropriate to the circumstances are selected
  4. Hazards associated with the work are identified and risks are managed
  5. Diagnostic tools and equipment are selected and checked for serviceability
Job requirements are determined from workplace instructions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Diagnostic information is sourced and interpreted

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Diagnostic 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:

 

 

 

 

 

 

 

Diagnostic tools and equipment are selected and checked for serviceability

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Diagnose air conditioning and HVAC system

  1. Diagnostic tests are carried out according to workplace proceduresand safety and environmental requirements using appropriate tools and techniques without causing damage to components or system
  2. Faultsare identified from diagnostic test results and causes of faults are determined
  3. Diagnosis findings and recommendations for necessary repairs or adjustments are reported according to workplace procedures
Diagnostic tests are carried out according to workplace proceduresand safety and environmental requirements using appropriate tools and techniques without causing damage to components or system

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Faultsare identified from diagnostic test results and causes of faults are determined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Diagnosis findings and recommendations for necessary repairs or adjustments are reported according to workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Repair air conditioning and HVAC system

  1. Repair information is sourced and interpreted
  2. Repair options are analysed and those most appropriate to the circumstances are selected
  3. Repair tools, equipment and materials are selected and checked according to manufacturer specifications and workplace procedures
  4. Repairs and component replacements and adjustments are carried out according to requirements, and without causing damage to components or systems
  5. System is recharged with the appropriate refrigerant gas according to manufacturer specifications and workplace procedures
  6. Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair process are rectified
Repair information is sourced and interpreted

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Repair tools, equipment and materials are selected and checked according to manufacturer specifications and workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Repairs and component replacements and adjustments are carried out according to requirements, and without causing damage to components or systems

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

System is recharged with the appropriate refrigerant gas according to manufacturer specifications and workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair process are rectified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete work processes

  1. Final inspection is made to ensure work is to workplace expectations and the vehicle or machinery is presented ready for use
  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 faulty electrical equipment is identified, tagged and isolated according to workplace procedures
  4. Australian Refrigeration Council accredited service decal sticker (ARCtick) and other required workplace documentation are completed and processed according to workplace procedures
Final inspection is made to ensure work is to workplace expectations and the vehicle or machinery is presented ready for use

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 faulty electrical equipment is identified, tagged and isolated according to workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Australian Refrigeration Council accredited service decal sticker (ARCtick) and other required workplace documentation are completed and 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 diagnose and repair air conditioning and HVAC system

1.1 Job requirements are determined from workplace instructions

1.2 Diagnostic information is sourced and interpreted

1.3 Diagnostic options are analysed and those most appropriate to the circumstances are selected

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

1.5 Diagnostic tools and equipment are selected and checked for serviceability

2. Diagnose air conditioning and HVAC system

2.1 Diagnostic tests are carried out according to workplace proceduresand safety and environmental requirements using appropriate tools and techniques without causing damage to components or system

2.2 Faultsare identified from diagnostic test results and causes of faults are determined

2.3 Diagnosis findings and recommendations for necessary repairs or adjustments are reported according to workplace procedures

3. Repair air conditioning and HVAC system

3.1 Repair information is sourced and interpreted

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

3.3 Repair tools, equipment and materials are selected and checked according to manufacturer specifications and workplace procedures

3.4 Repairs and component replacements and adjustments are carried out according to requirements, and without causing damage to components or systems

3.5 System is recharged with the appropriate refrigerant gas according to manufacturer specifications and workplace procedures

3.6 Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair process are rectified

4. Complete work processes

4.1 Final inspection is made to ensure work is to workplace expectations and the vehicle or machinery is presented ready for use

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

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

4.4 Australian Refrigeration Council accredited service decal sticker (ARCtick) and other required workplace documentation are completed and 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 diagnose and repair air conditioning and HVAC system

1.1 Job requirements are determined from workplace instructions

1.2 Diagnostic information is sourced and interpreted

1.3 Diagnostic options are analysed and those most appropriate to the circumstances are selected

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

1.5 Diagnostic tools and equipment are selected and checked for serviceability

2. Diagnose air conditioning and HVAC system

2.1 Diagnostic tests are carried out according to workplace proceduresand safety and environmental requirements using appropriate tools and techniques without causing damage to components or system

2.2 Faultsare identified from diagnostic test results and causes of faults are determined

2.3 Diagnosis findings and recommendations for necessary repairs or adjustments are reported according to workplace procedures

3. Repair air conditioning and HVAC system

3.1 Repair information is sourced and interpreted

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

3.3 Repair tools, equipment and materials are selected and checked according to manufacturer specifications and workplace procedures

3.4 Repairs and component replacements and adjustments are carried out according to requirements, and without causing damage to components or systems

3.5 System is recharged with the appropriate refrigerant gas according to manufacturer specifications and workplace procedures

3.6 Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair process are rectified

4. Complete work processes

4.1 Final inspection is made to ensure work is to workplace expectations and the vehicle or machinery is presented ready for use

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

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

4.4 Australian Refrigeration Council accredited service decal sticker (ARCtick) and other required workplace documentation are completed and processed according to workplace procedures

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

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.

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS) and occupational health and safety (OHS) 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

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

key requirements relevant to diagnosing and repairing air conditioning and HVAC systems detailed in the Australian automotive code of practice: Control of refrigerant gases during manufacture, installation, servicing or de-commissioning of motor vehicle air conditioners

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

application, 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:

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

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

ambient temperature

vent temperature

condenser and suction line temperature.

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 and using fire safety equipment

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

Repairs and component replacement and adjustment requirements must include:

manufacturer specifications

workplace procedures

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

Post-repair testing must include:

validating the effectiveness of the repair action by checking the following:

ambient temperature

centre vent temperature

condenser and suction line temperature

manifold gauge pressure readings

refrigerant leaks

heater core and system water coolant leaks.

Australian Refrigeration Council accredited (ARCtick) service decal sticker information must include:

name of the service organisation

name of technician

Refrigerant Handling Licence Number

vehicle registration number

service date

refrigerant type

lubricant type.