MEM27027 — Install or modify mobile plant air conditioning systems

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What an assessment for MEM27027 must cover

56 assessable components: 4 elements (25 performance criteria), 11 performance evidence and 20 knowledge evidence requirements. An audit-defensible tool maps every question and task back to these — that mapping is the coverage matrix Auditori generates alongside the assessment.

Elements & performance criteria

1 Determine job requirements

1.1Follow standard operating procedures (SOPs)
1.2Comply with work health and safety (WHS) requirements at all times
1.3Use appropriate personal protective equipment (PPE) in accordance with SOPs
1.4Identify job requirements from specifications, drawings, job sheets or work instructions
1.5Plan job to conform to Australian Refrigeration Council (ARC) code of practice requirements

2 Install air conditioning system in new mobile plant

2.1Check that mobile plant is parked and engine/power source are safe for air conditioning system access and work
2.2Check cabin installation site against drawings or specifications for access, dimension and levels
2.3Check supplied air conditioning system matches specification and is complete
2.4Identify locations for structural support brackets and other support and holding components
2.5Identify air conditioning connection location and requirements for power, control modules, fieldbus wiring and sensors
2.6Prepare all surfaces, materials and components for use
2.7Install air conditioning system and connections in conformance with manufacturer and customer specifications
2.8Check air conditioning system is levelled, aligned, coupled and connected in accordance with specifications
2.9Charge system with specified refrigerant according to manufacturer specifications and regulatory requirements

3 Modify or retrofit mobile plant air conditioning system

3.1Determine modification requirements from customer specifications, job instructions and drawings, and equipment manuals
3.2Check that mobile plant is isolated/made safe according to SOPs
3.3De-gas system using approved recovery unit and appropriate refrigerant recovery cylinder for the refrigerant type
3.4Recover oil and evacuate system
3.5Remove air conditioning system or components requiring modification according to SOPs
3.6Retrofit or modify air conditioning system according to manufacturer specifications and customer requirements
3.7Pressure test system and identify leaks and non-conformances to specifications
3.8Re-charge system with specified refrigerant according to manufacturer specifications and regulatory requirements

4 Test and complete installation of new /retrofitted or modified mobile plant air conditioning system

4.1Test air conditioning system for correct operation against specifications
4.2Trace non-conformances to specifications to root cause and rectify
4.3Document installation or modification actions according to workplace procedures

Performance evidence

following work instructions, standard operating procedures (SOPs) and safe work practices, including refrigerant safe handling procedures
obtaining and interpreting specifications, air conditioning system/circuit diagrams, system operation and control data records and identifying and inspecting system components for compliance with specifications
checking of new air conditioning systems and components for quality and completeness
planning installation, retrofitting or modification to ensure efficient assembly/disassembly of air conditioning systems and compliance with manufacturer specifications and regulatory requirements
checking and adjusting control and system operation using appropriate test equipment, including checking for: - ambient and vent temperature - condenser and suction temperature - manifold gauge pressure - refrigerant leaks - heater core and system water coolant leaks
ensuring that the sequence of operations conforms to specifications and operational requirements
recording/reporting any required modifications/alterations to new/retrofitted units in accordance with SOPs
testing air conditioning systems controls and circuits using appropriate test equipment
repairing/replacing faulty items after testing for compliance to specifications using appropriate tools, equipment and techniques
reassembling of air conditioning system to meet specifications
verifying correct operation of air conditioning system after service and repair.

Knowledge evidence

safe work practices and procedures and use of personal protective equipment (PPE)
types of air conditioning systems used in mobile applications, including: - piston, scroll and rotary vane compressors - electric compressors - variable displacement compressors - clutchless compressors - single and multi- zone
system operational and control requirements and specifications, including: - high and low pressure switches - pressure relief valves - temperature sensors - sunlight sensors - zone temperature sensors - carbon dioxide sensors
heating system components, including core, control valve, blower motor and fan, ducts, controls and sensors
typical mobile systems refrigerants, their features and applications and relationship to Australian Refrigerant Council (ARC) regulatory requirements
lubricating oils
application of air conditioning system components and controls
digital controllers in mobile fieldbus systems (e.g. controller area network (CAN) bus) and their function and capabilities in regards to air conditioning systems
controller fault code interrogation and interpretation where installed
circuit sensors and controllers
special system installation requirements
air conditioning system test equipment and test procedures, including use of: - manifold gauges - surface probe thermocouples - temperature gauges - scan tools - electrical test equipment - electronic leak detectors - recovery units - vacuum pumps - electronic scales - other test equipment relevant to the vehicle system
correct operational sequence of the system
typical adjustments to correct sequencing variations from specification
procedures for recording/reporting modifications/alterations and consequences of not recording/reporting
air conditioning system commissioning procedures
cause of the faulty condition in new components and appropriate procedures for rectifying the faulty condition
appropriate control component connection procedures
typical test equipment and its application
common adjustments that can be made to control systems and their effects.

Unit content sourced from training.gov.au — © Commonwealth of Australia, licensed under CC BY 4.0. Auditori is not affiliated with the Department of Employment and Workplace Relations.

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Questions about assessing MEM27027

What does an assessment tool for MEM27027 need to cover?

To satisfy the Principles of Assessment and Rules of Evidence, an assessment for MEM27027 needs to address all 56 unit components: 4 elements with 25 performance criteria, 11 performance evidence requirements, 20 knowledge evidence requirements, and the foundation skills. A coverage matrix mapping each question and task to these components is what an auditor looks for.

How does Auditori generate an assessment tool for MEM27027?

Auditori pulls the current release of MEM27027 from training.gov.au and generates a complete package: candidate assessment, assessor guide with model answers and observation criteria, and a coverage matrix mapping every component. A suitably qualified person then reviews and approves the draft in a built-in workflow — consistent with ASQA's guidance on AI use in VET — before export as branded PDF and editable Word.

Is the first assessment tool really free?

Yes. Every new account includes one free credit — enough to generate the complete assessment tool for MEM27027 — with no card and no subscription required. After that it's pay-as-you-go per unit.

Can I check my existing MEM27027 assessment instead of generating a new one?

Yes — upload your existing assessment or learner guide and Auditori maps it against every element, performance criterion, PE and KE of MEM27027, showing exactly what's covered and what's missing. Mapping costs a quarter of a credit.

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