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Unit of competency details

MEM18085 - Install, service and repair domestic air conditioning and refrigeration appliances (Release 1)

Summary

Usage recommendation:
Current
Mapping:
MappingNotesDate
Supersedes and is equivalent to MEM18085A - Install, service and repair domestic air conditioning and refrigeration appliancesSupersedes and is equivalent to MEM18085A Install, service and repair domestic air conditioning and refrigeration appliances 25/Jun/2019

Release Status:
Current
Releases:
ReleaseRelease date
1 1 (this release) 26/Jun/2019


Classifications

SchemeCodeClassification value
ASCED Module/Unit of Competency Field of Education Identifier 031315 Refrigeration And Air Conditioning Mechanics  

Classification history

SchemeCodeClassification valueStart dateEnd date
ASCED Module/Unit of Competency Field of Education Identifier 031315 Refrigeration And Air Conditioning Mechanics  26/Jun/2019 
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Unit Of competency

Modification History

Release 1. Supersedes and is equivalent to MEM18085A Install, service and repair domestic air conditioning and refrigeration appliances

Application

This unit of competency defines the skills and knowledge required to install, service and repair domestic air conditioning and refrigeration appliances to relevant standards, codes and local regulations and is limited to domestic air conditioning and refrigeration systems only.

It includes the application of safe working practices, following standard procedures to perform functional checks, test system performance and carry out straightforward maintenance.

This unit refers to plug-in appliances only.

Where interpretation of technical drawings is required unit MEM09002 Interpret technical drawing should also be selected.

A Refrigerant Handling Licence must be held by any person who carries out work in relation to refrigeration and air conditioning equipment.

Band : A 

Unit Weight : 6 

Pre-requisite Unit

MEM05006

Perform brazing and/or silver soldering

MEM11011

Undertake manual handling

MEM12002

Perform electrical/electronic measurement

MEM12023

Perform engineering measurements

MEM12024

Perform computations

MEM13015

Work safely and effectively in manufacturing and engineering

MEM16006

Organise and communicate information

MEM18001

Use hand tools

MEM18002

Use power tools/hand held operations

MEM18055

Dismantle, replace and assemble engineering components

Competency Field

Maintenance and diagnostics

Elements and Performance Criteria

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Determine job requirements 

1.1

Follow standard operating procedures (SOPs)

1.2

Comply with work health and safety (WHS) requirements at all times

1.3

Use appropriate personal protective equipment (PPE) in accordance with SOPs

1.4

Identify job requirements from specifications, job sheets or work instructions

2

Install and remove domestic refrigeration and air conditioning appliances 

2.1

Identify appliance location and site in accordance with customer requirements, regulations, standards, codes of practice and industry guidelines

2.2

Prepare site and install and secure appliance in accordance with manufacturer instructions and industry best practice

2.3

Check operation of the appliance in accordance with manufacturer instructions

2.4

Dispose of waste materials and products in accordance with Commonwealth and state/territory legislation, environmental and industry codes of practice

3

Determine operating condition of appliances 

3.1

Identify refrigerant used in equipment and protect from ignition sources if refrigerant is flammable

3.2

Carry out established procedures and standard electrical tests to determine actual operating condition

3.3

Follow established work health and safety (WHS) risk control measures and procedures to enable the system to be isolated and checked, where necessary

3.4

Determine the basic refrigeration operating conditions and check for correct operation and safety using appropriate tools, equipment and testing devices

3.5

Follow industry codes of practice and manufacturer service instructions

4

Carry out routine maintenance 

4.1

Identify safety hazards and record and implement established risk control measures

4.2

Perform routine maintenance procedure in accordance with manufacturer and client scheduling

4.3

Maintain routine maintenance records and record faults

5

Fault find and troubleshoot faults 

5.1

Select equipment and testing devices needed to determine fault

5.2

Apply standard test procedures to determine faults against equipment specifications

5.3

Record test data and record faults, as required

6

Replace, repair or service faulty components 

6.1

Disconnect plug in appliance electrically

6.2

Replace electrical components in accordance with manufacturer recommendations

6.3

Select and prepare refrigeration system replacement components

6.4

Recover refrigerant, store and dispose of in accordance with Commonwealth and state/territory legislation and industry codes of practice

6.5

Install refrigeration system components in accordance with industry best practice, standards and codes

7

Return to service domestic refrigeration and air conditioning appliances 

7.1

Identify standard electrical tests to identify electrical faults before operating

7.2

Start appliance and operate in accordance with manufacturer standards

7.3

Carry out standard tests to confirm system performance to manufacturer specifications

7.4

Record appliance operating data, as required

7.5

Ensure worksite is cleaned and left in presentable condition in accordance with original presentation, client requirements, industry standards and organisational requirements

Foundation Skills

This section describes those required skills (reading, writing, oral communication and numeracy) that are essential to workplace performance in this unit of competency.

Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

Range of Conditions

This field allows for different 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.

Routine maintenance includes the following: 

  • electrical testing of the appliance
  • polarity testing
  • cleaning condensers
  • clearing drains
  • checking temperatures
  • pressures
  • component operation
  • air flow and system capacity
  • cleaning filters

Standard electrical tests include:  

  • earth continuity, insulation resistance, and circuit resistance to meet electrical equipment regulations and codes (AS/NZS 3000:2007 Electrical Installations (known as the Australian/New Zealand Wiring Rules)
  • testing of supply voltage and the appliance or individual component current draw

Tools , equipment and testing devices include one (1) or more of the following: 

  • refrigeration gauge manifold
  • Schraeder access valves; quick connect couplings, thermometer/thermocouple temperature measuring devices
  • analog and digital vacuum measuring gauges
  • digital scales
  • refrigerant recovery unit
  • vacuum pump
  • electronic leak detectors
  • refrigerant containers/cylinders

Industry best practice includes: 

  • pipe fabrication techniques and industry best practice for pipe brazing

Standard refrigeration return to service procedures include one (1) or more of the following: 

  • leak detection
  • evacuation
  • refrigerant charging of domestic air conditioning and refrigeration plug-in appliances

Commonwealth, state and territory legislation, regulations, standards, codes of practice and industry guidelines include one (1) or more of the following: 

  • Ozone Protection and Synthetic Greenhouse Gas Legislation Amendment Bill 2003
  • air conditioning residential best practice guidelines (AIRAH)
  • AIRAH flammable refrigerant fact sheets and guide
  • state/territory and local building regulations
  • codes of practice for domestic refrigeration and air conditioning. (HB40)

System performance includes one (1) or more of the following: 

  • pressure
  • temperature
  • sub-cooling
  • superheating
  • evaporator coil to air temperature difference

Domestic refrigeration and air conditioning appliances include: 

  • self-contained plug in appliances primarily designed for domestic and residential situations, including one or more of the following:
  • refrigerators - single door, two door and two door side by side
  • freezers - chest and vertical door using, for example, refrigeration systems with cyclic defrost, frost-free with electric and hot-gas defrost, and manual defrost
  • air conditioners (window and wall mounted self-contained room air conditioners)

Unit Mapping Information

Release 1. Supersedes and is equivalent to MEM18085A Install, service and repair domestic air conditioning and refrigeration appliances

Links

Companion Volume implementation guides are found in VETNet - https://vetnet.gov.au/Pages/TrainingDocs.aspx?q=b7050d37-5fd0-4740-8f7d-3b7a49c10bb2

 

Assessment requirements

Modification History

Release 1. Supersedes and is equivalent to MEM18085A Install, service and repair domestic air conditioning and refrigeration appliances

Performance Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy the requirements of the elements and performance criteria on at least two (2) occasions and include:

  • following work instructions, standard operating procedures (SOPs) and safe work practices
  • identifying and interpreting charts, lists, catalogues, specifications and legislative and industry requirements and guidelines and obtaining relevant data with respect to servicing and repairing domestic air conditioning and refrigeration appliances
  • installing and removing domestic refrigeration and air conditioning appliances in accordance with customer requirements, regulations, standards, codes of practice and industry guidelines
  • isolating circuit and appliances in strict accordance with work health and safety (WHS) requirements and procedures, where necessary
  • checking operating condition of refrigeration and air conditioning appliances using appropriate tools, techniques and equipment and comparing system and component performance/operation against specifications
  • carrying out routine maintenance of refrigeration and air conditioning appliances
  • identifying faulty components and non-compliances using appropriate tools, equipment and testing devices
  • replacing, repairing or servicing faulty components in accordance with specifications and industry best practice
  • removing, containing and adding refrigerant safely in compliance with relevant Australian Standards or codes and regulations
  • carrying out standard electrical tests in accordance with specifications
  • completing all relevant standard, code or local required documentation.

Knowledge Evidence

Evidence required to demonstrate the required knowledge for this unit must be relevant to and satisfy the requirements of the elements and performance criteria and include knowledge of:

  • safe work practices and procedures and use of personal protective equipment (PPE)
  • procedures and industry best practice for brazing refrigeration pipework
  • procedures for complying to all legislative and regulatory requirements for safely removing the refrigerant and charging and evacuating the system
  • procedures for evacuating system, pressure and leak testing, handling and adding refrigerant and checking air flow
  • safety and legislative requirements for handling refrigerants
  • standard electrical measurements for earth continuity, insulation resistance, circuit resistance, supply voltage and current
  • measuring instruments/equipment, specifications and procedures for checking temperature, system performance and testing components
  • specifications, operational characteristics and process for identifying system components
  • process for identifying refrigerant type
  • requirements and procedures for reporting non-compliances completing documentation.

Assessment Conditions

  • Assessors must:
  • have vocational competency in installing, servicing and repairing domestic air conditioning and refrigeration appliances at least to the level being assessed with relevant industry knowledge and experience
  • satisfy the assessor requirements in the Standards for Registered Training Organisations 2015 or its replacementand comply with the National Vocational Education and Training Regulator Act 2011, its replacementor equivalent legislation covering VET regulation in a non-referring state/territory as the case requires
  • Where possible assessment must occur in operational workplace situations. Where this is not possible or where personal safety or environmental damage are limiting factors, assessment must occur in a sufficiently rigorous simulated environment that reflects realistic operational workplace conditions. This must cover all aspects of workplace performance, including environment, task skills, task management skills, contingency management skills and job role environment skills
  • Conditions for assessment must include access to all tools, equipment, materials and documentation required, including relevant workplace procedures, product and manufacturing specifications
  • Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.

Links

Companion Volume implementation guides are found in VETNet - https://vetnet.gov.au/Pages/TrainingDocs.aspx?q=b7050d37-5fd0-4740-8f7d-3b7a49c10bb2