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Evidence Guide: MEM18088B - Maintain and repair commercial air conditioning systems and components

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

MEM18088B - Maintain and repair commercial air conditioning systems and components

What evidence can you provide to prove your understanding of each of the following citeria?

Undertake preventive maintenance checks/adjustment on commercial air conditioning systems and components

  1. The temperature, quality, properties and flow of air delivered by the air conditioning system is checked for conformance to specification.
  2. The noise/vibration levels of the air conditioning system components are checked for conformance to specification.
  3. Preventative maintenance tasks are performed according to manufacturers' specifications using refrigeration and air conditioning principles and techniques.
The temperature, quality, properties and flow of air delivered by the air conditioning system is checked for conformance to specification.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The noise/vibration levels of the air conditioning system components are checked for conformance to specification.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Preventative maintenance tasks are performed according to manufacturers' specifications using refrigeration and air conditioning principles and techniques.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Undertake fault finding on commercial air conditioning systems and components

  1. System components are identified correctly.
  2. The characteristics and operation of each component are explained.
  3. The operational function of each component is inspected and tested.
  4. Correct operation of each component is assessed against system specification.
System components are identified correctly.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The characteristics and operation of each component are explained.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The operational function of each component is inspected and tested.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Correct operation of each component is assessed against system specification.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Repair/replace faulty commercial air conditioning components

  1. Faulty components are localised and malfunction confirmed by inspection and testing using air conditioning principles, procedures and safety requirements.
  2. The refrigerant is removed safely from the system and contained in accordance with standard operating procedures and regulatory requirements where appropriate.
  3. Faulty components are dismantled and repaired to manufacturers' specifications as required.
  4. Replacement parts are selected from manufacturers' catalogues according to required specifications.
Faulty components are localised and malfunction confirmed by inspection and testing using air conditioning principles, procedures and safety requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The refrigerant is removed safely from the system and contained in accordance with standard operating procedures and regulatory requirements where appropriate.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Faulty components are dismantled and repaired to manufacturers' specifications as required.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Replacement parts are selected from manufacturers' catalogues according to required specifications.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Return to service commercial air conditioning systems and components

  1. Components are reassembled and tested for correct operation and assessed against specification.
  2. The system is charged with correct refrigerant safely and in accordance with standard operating procedures and regulatory requirements.
  3. Using air conditioning principles, correct operation of the equipment is verified.
  4. Maintenance records/service reports are completed by appropriate designated means.
Components are reassembled and tested for correct operation and assessed against specification.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The system is charged with correct refrigerant safely and in accordance with standard operating procedures and regulatory requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Using air conditioning principles, correct operation of the equipment is verified.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Maintenance records/service reports are completed by appropriate designated means.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

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 commercial air conditioning systems and components. 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 commercial air conditioning systems 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 should not require language, literacy and numeracy skills beyond those required in this unit. 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

Required Skills and Knowledge

Required skills

Look for evidence that confirms skills in:

selecting and using equipment for testing and checking temperature, flow and quality of the conditioned air

checking task-related information

identifying faults and non-compliances

making required adjustments to achieve specifications

comparing operation of each system component against system specification

planning and sequencing operations

entering routine and familiar information onto proformas and standard workplace forms

reading, interpreting and following information on written job instructions, specifications, standard operating procedures, charts, lists, drawings and other applicable reference documents

Required knowledge

Look for evidence that confirms knowledge of:

measuring instruments/equipment and specifications for checking air temperatures, air flows, air quality and air properties

procedures for reporting non-conformances

air properties controlled by the air conditioning system

measuring instruments/equipment and specifications required for checking component noise and vibration levels

procedures and sequence for performing preventative maintenance on air conditioning systems

specifications and process for identifying system components

operational characteristics of the system components

procedures for inspecting and testing system components and operational compliance

procedures for assessing that the operation of system components meet system specification

appropriate process for localising and confirming faulty components

procedures and all legislative and regulatory requirements for safely removing the refrigerant from the system and charging the system

procedures for dismantling and repairing faulty components and selecting replacement parts

procedures for reassembling and testing components

procedures for completing maintenance records/service reports

hazards and control measures associated with maintaining and repairing commercial air conditioning systems and components

safe work practices and procedures

selecting and using equipment for testing electrical compliance of equipment

documenting and reporting

calculations and numerical operations within the scope of this unit

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