Unit of competency Outline
Date retreived
23/07/2026 5:36 AM AWST
23/07/2026 5:36 AM AWST
Whilst all efforts are made to provide accurate and timely information from the relevant source/documentation, please be aware that the information supplied may not be the most current version. The accuracy of the detail has not been confirmed by the Department and therefore should not be relied upon without first confirming the contents.
Maintain and repair central air handling systems
Maintain and repair central air handling systems
Unit of competency
National Code
MEM18089B
MEM18089B
State Code
W5625
W5625
TGA Status
Replaced
Replaced
DTWD Status
Replaced
Replaced
State Implementation and Classification
Approved Date
11/09/2006
Field of Education
031315 - Refrigeration And Air Conditioning Mechanics
Original Release Date
11/09/2006
Nominal Hours
54
Description
This unit covers maintaining and repairing large central air handling systems. It includes interpreting drawings and diagrams of large central air handling systems; utilising fault finding procedures and testing equipment to identify and diagnose faults in systems and isolate faulty components; rectifying faults; returning to service; testing the systems; and completing service reports.
Notes
Elements and Performance Criteria
1. Undertake preventive maintenance checks/adjustment on large central air handling systems
- 1.1. The temperature, humidity, quality, pressure and flow of air delivered to zones by the air handling system are checked for conformance to specification.
- 1.2. The noise/vibration levels of the air handling sub-systems are checked for conformance to specification.
- 1.3. Preventative maintenance tasks are performed according to manufacturers' specifications using appropriate refrigeration and air conditioning techniques/practices.
2. Undertake fault finding on large central air handling systems
- 2.1. Components of sub-systems are correctly identified.
- 2.2. The characteristics and operation of each sub-system component can be explained.
- 2.3. The operational function of each sub-system component is inspected and tested.
- 2.4. Correct operation of each component is assessed against specification.
3. Repair/replace faulty air handling components
- 3.1. Faulty components are localised and malfunction is confirmed by inspection and testing using air conditioning principles, procedures and safety requirements.
- 3.2. Faulty components are dismantled and repaired to manufacturer' specifications as required.
- 3.3. Replacement parts are selected from manufacturers' catalogues according to required specifications.
4. Return to service large central air handling systems
- 4.1. Components are reassembled and tested for correct operation and assessed against specification.
- 4.2. Correct operation of the equipment is verified using air handling principles and techniques.
- 4.3. Maintenance records/service reports are completed by appropriate designated means.
RANGE STATEMENT
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.
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 safety devices
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.
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 safety devices
EVIDENCE GUIDE
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.
Overview of assessment
A person who demonstrates competency in this unit must be able to maintain and repair large central air handling systems. 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 maintenance and repair of large central air handling systems 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
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.
Overview of assessment
A person who demonstrates competency in this unit must be able to maintain and repair large central air handling systems. 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 maintenance and repair of large central air handling systems 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
Replaced By
| State Code | National Code | Title | Type |
|---|---|---|---|
| OAU40 | MEM18089 | Maintain and repair central air handling systems | Unit of competency |
| State Code | National Code | Title | Type |
|---|---|---|---|
| W245 | MEM40105 | Certificate IV in Engineering | Qualification |
| W247 | MEM50105 | Diploma of Engineering - Advanced Trade | Qualification |
| W237 | MEM30205 | Certificate III in Engineering - Mechanical Trade | Qualification |
| W726 | LMT31909 | Certificate III in Engineering - TCF Mechanic | Qualification |