Modification History
Single band identifier removed to clarify dual status
Unit Descriptor
Unit descriptor |
This unit covers repairing or replacing commercial and/or industrial refrigeration and/or commercial air conditioning controls. |
Application of the Unit
Application of the unit |
This unit applies to the installation, adjustment, repairs, replacements and overhauls undertaken to site or manufacturers' specifications, using application of principles of domestic refrigeration and/or commercial air conditioning control sequencing which may include: PLCs, relay logic control systems, unitised/modular sensors, transducers, timers, counters and associated equipment. System circuit components are identified, traced, inspected and operational function is assessed and verified using refrigeration/air conditioning principles to predetermined specifications, interpreted from data sheets and circuit diagrams. The application of this competency must cover a variety of refrigeration equipment and systems. Band: This unit has dual status and is to be regarded as both a specialisation band A unit and Specialisation band B unit for progression to C7 (AQF level IV). Unit Weight : 6 |
Licensing/Regulatory Information
Not Applicable
Pre-Requisites
Prerequisite units |
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Path 1 |
MEM09002B |
Interpret technical drawing |
MEM12002B |
Perform electrical/electronic measurement |
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MEM12023A |
Perform engineering measurements |
|
MEM18001C |
Use hand tools |
|
MEM18002B |
Use power tools/hand held operations |
|
MEM18055B |
Dismantle, replace and assemble engineering components |
|
MEM18086B |
Test, recover, evacuate and charge refrigeration systems |
|
MEM18088B |
Maintain and repair commercial air conditioning systems and components |
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Path 2 |
MEM09002B |
Interpret technical drawing |
MEM12002B |
Perform electrical/electronic measurement |
|
MEM12023A |
Perform engineering measurements |
|
MEM18001C |
Use hand tools |
|
MEM18002B |
Use power tools/hand held operations |
|
MEM18055B |
Dismantle, replace and assemble engineering components |
|
MEM18086B |
Test, recover, evacuate and charge refrigeration systems |
|
MEM18090B |
Maintain and repair industrial refrigeration systems and components |
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. Install/replace refrigeration/air conditioning controls |
1.1. Refrigeration/air conditioning control principles and system diagrams are interpreted. 1.2. Control circuit components are identified and inspected for compliance to specification. 1.3. Sequential installation is undertaken according to manufacturers' specifications and standard operating procedures. |
2. Check and adjust refrigeration/air conditioning control sequence and operation |
2.1. The temperature, quality, pressure and properties of the air delivered by the air conditioning system are checked for conformance to specification. 2.2. Controls operation is checked against operational specifications using appropriate test equipment and application principles/techniques. 2.3. Adjustments are performed to control sequence to meet/align to operational requirements and specifications. 2.4. Modifications/alterations are recorded and reported in accordance with standard operating procedures. 2.5. Controls operation is checked and returned to service to specification. |
3. Fault find refrigeration/air conditioning control circuits |
3.1. Control circuit diagrams and data sheets are interpreted. 3.2. Control circuit components are identified and inspected. 3.3. Control circuit is traced and action of components is diagnosed to identify and localise faults. 3.4. Control circuit parts are tested using appropriate test equipment and application principles. 3.5. Control circuit parts are assessed against operational specification. 3.6. Fault condition is localised at the component level. 3.7. Faulty condition is evaluated, root cause is analysed and corrective action is planned. |
4. Maintain, repair/replace control components |
4.1. Correct maintenance procedures are applied according to standard operating procedures. 4.2. Repair procedures are selected and applied using correct and appropriate techniques, tools and equipment. 4.3. Faulty items are tested, repaired or replaced using sequential installation procedures according to manufacturers' specifications. 4.4. Replacement items are selected from manufacturers' catalogues to meet specification. 4.5. Control components are reassembled using appropriate principles and procedures according to specification. |
5. Check and adjust sequence of refrigeration/air conditioning controls |
5.1. Sensors and controllers are identified using circuit diagram and refrigeration/air conditioning system control principles. 5.2. Necessary adjustments to sequence control circuit are made to meet operational specification. 5.3. Correct operation of control circuit is checked and confirmed against operational specification. 5.4. Refrigeration/air conditioning controls are returned to service to specification. 5.5. Appropriate follow-up procedures are adopted. 5.6. Service/maintenance report is completed to standard operating procedures. |
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 maintain and repair commercial and/or industrial refrigeration and/or air conditioning controls. 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 the repair/replacement of commercial and/or industrial refrigeration and/or commercial air conditioning controls, 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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Appropriate test equipment |
Pressure gauges, multimeters, ampmeters, megohm meter, analyser |
Modifications /alterations |
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Corrective action |
Replacement, repair, adjustment |
Maintenance procedures |
Overhaul of major system components, cleaning of major system components, testing operation of all control and safety devices |
Unit Sector(s)
Unit sector |
Co-requisite units
Co-requisite units |
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Competency field
Competency field |
Maintenance and diagnostics |