Modification History
Prerequisite unit MEM05006B updated to MEM05005C
Unit Descriptor
Unit descriptor |
This unit covers servicing of domestic and light commercial refrigeration and air conditioning equipment and components. It includes interpreting diagrams of refrigeration and air conditioning equipment; utilising basic fault finding procedures, service manifolds and test equipment to identify and diagnose faults in equipment; isolating faulty components including control components; and rectifying common faults. |
Application of the Unit
Application of the unit |
This unit applies to retrofitting existing domestic and light commercial refrigeration and air conditioning equipment with alternative refrigerants; reconditioning components; returning to service; testing equipment; and completing service reports for administrative action. Prerequisite pathways must be applied within a refrigeration/air conditioning context. Band : A Unit Weight : 6 |
Licensing/Regulatory Information
Not Applicable
Pre-Requisites
Prerequisite units |
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Path 1 |
MEM05006C |
Perform brazing and/or silver soldering |
MEM09002B |
Interpret technical drawing |
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MEM12002B |
Perform electrical/electronic measurement |
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MEM12023A |
Perform engineering measurements |
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MEM18001C |
Use hand tools |
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MEM18002B |
Use power tools/hand held operations |
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MEM18055B |
Dismantle, replace and assemble engineering components |
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MEM18086B |
Test, recover, evacuate and charge refrigeration systems |
Employability Skills Information
Employability skills |
This unit contains employability skills. |
Elements and Performance Criteria Pre-Content
Elements describe the essential outcomes of a unit of competency. |
Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold italicised text is used, further information is detailed in the required skills and knowledge section and the range statement. Assessment of performance is to be consistent with the evidence guide. |
Elements and Performance Criteria
ELEMENT |
PERFORMANCE CRITERIA |
1. Undertake preventive maintenance checks/adjustment on domestic/light commercial refrigeration/air conditioning |
1.1. Visual inspection and testing with appropriate test equipment are carried out according to refrigeration/air conditioning principles, procedures and safety requirements. 1.2. Preventative maintenance tasks are performed according to manufacturers' specifications using refrigeration/air conditioning techniques/practices. |
2. Undertake fault finding on domestic/light commercial refrigeration/air conditioning equipment |
2.1. Equipment components are identified correctly. 2.2. The characteristics and operation of each component is understood. 2.3. The operational function of each component is inspected and tested. 2.4. Correct operation of each component is assessed against specification. |
3. Repair/replace faulty domestic/light commercial refrigeration/air conditioning components |
3.1. Faulty components are localised and malfunction is confirmed by inspection and testing using refrigeration and air conditioning principles, procedures and safety requirements. 3.2. The refrigerant is removed safely from the system and contained in accordance with standard operating procedures and regulatory requirements where appropriate. 3.3. Faulty components are dismantled and repaired/replaced to manufacturers' specifications as required. 3.4. Replacement parts are selected from manufacturers' catalogues according to required specifications and relevant legislation. |
4. Return to service domestic/light commercial refrigeration/air conditioning equipment |
4.1. Components are reassembled and tested for correct operation and assessed against specification. 4.2. Using domestic refrigeration/air conditioning principles and system application techniques, correct operation of the equipment is verified. 4.3. Maintenance records/service reports are completed by appropriate designated means. |
Required Skills and Knowledge
REQUIRED SKILLS AND KNOWLEDGE |
This section describes the skills and knowledge required for this unit. |
Required skills |
Look for evidence that confirms skills in:
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Required knowledge |
Look for evidence that confirms knowledge of:
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Evidence Guide
EVIDENCE GUIDE |
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The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package. |
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Overview of assessment |
A person who demonstrates competency in this unit must be able to service and repair domestic and light commercial refrigeration and air conditioning equipment. Competency in this unit cannot be claimed until all prerequisites have been satisfied. |
Critical aspects for assessment and evidence required to demonstrate competency in this unit |
Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria, including required knowledge, and be capable of applying the competency in new and different situations and contexts. |
Context of and specific resources for assessment |
This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, that is the candidate is not in productive work, then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations. The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team. The assessment environment should not disadvantage the candidate. This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with servicing of domestic and light commercial refrigeration and air conditioning equipment and components or other units requiring the exercise of the skills and knowledge covered by this unit. |
Method of assessment |
Assessors should gather a range of evidence that is valid, sufficient, current and authentic. Evidence can be gathered through a variety of ways including direct observation, supervisor's reports, project work, samples and questioning. Questioning techniques should not require language, literacy and numeracy skills beyond those required in this unit of competency. The candidate must have access to all tools, equipment, materials and documentation required. The candidate must be permitted to refer to any relevant workplace procedures, product and manufacturing specifications, codes, standards, manuals and reference materials. |
Guidance information for assessment |
Range Statement
RANGE STATEMENT |
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The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included. |
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Test equipment |
Pressure gauges, vacuum gauges, multimeter, ampmeter, megohm meter, vacuum pump |
Preventative maintenance tasks |
Check/adjust fan belts, check/clean filters, check/clean heat exchangers (evaporator and condenser), overhaul of major system components, cleaning of major system components, testing operation of all control and safety devices, testing refrigeration charge, testing operational current, testing insulation resistance of relevant electrical components |
Relevant legislation |
Noise and environmental regulations. Other applicable Commonwealth, State and Territory regulations and legislation |
Unit Sector(s)
Unit sector |
Co-requisite units
Co-requisite units |
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Competency field
Competency field |
Maintenance and diagnostics |