Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners

UEENEEJ111A Mapping and Delivery Guide
Diagnose and rectify faults in air conditioning and refrigeration systems and components

Version 1.0
Issue Date: May 2024


Qualification -
Unit of Competency UEENEEJ111A - Diagnose and rectify faults in air conditioning and refrigeration systems and components
Description 1) 1.1) This unit covers diagnosing, repairing faults and replacing faulty components in refrigeration and air conditioning systems, components, interconnecting circuits and equipment operating at voltages up to 1,000 V a.c. It encompasses working safely, reading electrical circuit diagrams, refrigeration, hydronic and air distribution system diagrams and manufacturers reference material, sketching diagrams from traced wiring and piping systems, applying logical fault finding procedures, conducting repairs, replacing components and completing the necessary service documentation.
Employability Skills 3)This unit contains Employability SkillsThe required outcomes described in this unit of competency contain applicable facets of Employability Skills. The Employability Skills Summary of the qualification in which this unit of competency is packaged will assist in identifying Employability Skill requirements.
Learning Outcomes and Application 4) This unit is intended to augment previously acquired competencies. It is suitable for employment-based programs under an approved contract of training.
Duration and Setting X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting.
Prerequisites/co-requisites Prerequisite Unit(s)2) 2.1) CompetenciesGranting competency in this unit shall be made only after competency in the following unit(s) has/have been confirmed.UEENEEJ107A Install air conditioning and refrigeration systems, major components and associated equipmentUEENEEJ110A Select refrigerant piping, accessories and associated controlsUEENEEP017A Locate and rectify faults in low voltage composite appliances using set proceduresUEENEEE101A Apply Occupational Health and Safety regulations, codes and practices in the workplaceUEENEEE102A Fabricate, assemble and dismantle utilities industry componentsUEENEEE003B Solve problems in extra-low voltage single path circuitsUEENEEE105A Fix and secure electrotechnology equipmentUEENEEE107A Use drawings, diagrams, schedules, standards, codes and specificationsUEENEEE137A Document and apply measures to control OHS risks associated with electrotechnology workUEENEEJ102A Prepare and connect refrigerant tubing and fittingsUEENEEJ103A Establish the basic operating conditions of vapour compression systemsUEENEEJ104A Establish the basic operating conditions of air conditioning systemsUEENEEJ106A Install refrigerant pipe work, flow controls and accessoriesUEENEEJ108A Recover, pressure test, evacuate, charge and leak test refrigerantsUEENEEJ153A Find and rectify faults motors and associated controls in refrigeration and air conditioning systemsUEENEEJ194A Solve problems in low voltage refrigeration circuitsUEENEEJ170A Diagnose and rectify faults in air conditioning and refrigeration control systemsUEENEEP012A Disconnect / reconnect composite appliances connected to low voltage installation wiring
Competency Field 2.2) Literacy and numeracy skillsParticipants are best equipped to achieve competency in this unit if they have reading, writing and numeracy skills indicated by the following scales. Description of each scale is given in Volume 2, Part 3 'Literacy and Numeracy' Reading 3 Writing 3 Numeracy 3
Development and validation strategy and guide for assessors and learners Student Learning Resources Handouts
Activities 		Slides
PPT 		Assessment 1 Assessment 2 Assessment 3 Assessment 4
Elements of Competency Performance Criteria              
Element: Prepare to find and rectify faults
  • OHS procedures for a given work area are identified, identified, obtained and understood
  • OHS risk control measures and procedures in preparation for the work are followed.
  • The nature of the fault is obtained from documentation and/or from work supervisor to establish the scope of work to be undertaken.
  • Advice is sought from the work supervisor to ensure the work is coordinated effectively with others.
  • Sources of materials that may be required for the work are accessed in accordance with established procedures.
  • Tools, equipment and testing devices needed to carry out the work are obtained in accordance with established procedures and checked for correct operation and safety
       
Element: Find faults
  • OHS risk control measures and procedures for carrying out the work are followed.
  • The need to test or measure live and operating system is determined in strict accordance with OHS requirements and when necessary conducted within established safety procedures
  • Circuits/machines/plant are checked as being isolated where necessary in strict accordance OHS requirements and procedures
  • Fault finding is approached methodically drawing on knowledge of refrigeration and air conditioning systems using observation, measurement, calculations and comparison with normal system and component parameters/values.
  • Faults beyond the scope of refrigeration and air conditioning work are identified.
  • System components are removed/dismantled where necessary and parts stored to protect them against loss or damage
  • Faulty components are rechecked and their fault status confirmed.
  • Unexpected situations are dealt with safely and with the approval of an authorised person.
  • Fault finding activities are carried out without damage to apparatus, circuits, the surrounding environment or services and using sustainable energy practices.
       
Element: Repair fault
  • OHS risk control measures and procedures for carrying out the work are followed.
  • Arrangements are made for appropriately competent and authorised person to rectify faults that are beyond the scope of refrigeration and air conditioning work.
  • Equipment is checked as being isolated where necessary in strict accordance OHS requirements and procedures
  • Materials required to rectify faults are sourced and obtained in accordance with established procedures.
  • Repairs are affected efficiently without damage to other components or apparatus and using sustainable energy principles.
  • Effectiveness of the repair is tested in accordance with established procedures.
  • System is reassembled and finally tested to ensure it is operating safely, effectively and complies with relevant requirements.
       
Element: Completion and report fault finding and rectification activities
  • OHS work completion risk control measures and procedures are followed.
  • Work area is cleaned and made safe in accordance with established procedures.
  • Written justification is made for repairs to circuits/apparatus.
       


Evidence Required

List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.

9) The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria, Required Skills and Knowledge, the Range Statement and the Assessment Guidelines for this Training Package. .

The Evidence Guide forms an integral part of this Unit. It must be used in conjunction with all parts of this unit and performed in accordance with the Assessment Guidelines of this Training Package.

Overview of Assessment

9.1)

Longitudinal competency development approaches to assessment, such as Profiling, require data to be reliably gathered in a form that can be consistently interpreted over time. This approach is best utilised in Apprenticeship programs and reduces assessment intervention. It is the industry-preferred model for apprenticeships. However, where summative (or final) assessment is used it is to include the application of the competency in the normal work environment or, at a minimum, the application of the competency in a realistically simulated work environment. In some circumstances, assessment in part or full can occur outside the workplace. However, it must be in accordance with industry and regulatory policy.

Methods chosen for a particular assessment will be influenced by various factors. These include the extent of the assessment, the most effective locations for the assessment activities to take place, access to physical resources, additional safety measures that may be required and the critical nature of the competencies being assessed.

The critical safety nature of working with electricity, electrical equipment, gas or any other hazardous substance/material carries risk in deeming a person competent. Sources of evidence need to be 'rich' in nature to minimise error in judgment.

Activities associated with normal everyday work influence decisions about how/how much the data gathered will contribute to its 'richness'. Some skills are more critical to safety and operational requirements while the same skills may be more or less frequently practised. These points are raised for the assessors to consider when choosing an assessment method and developing assessment instruments. Sample assessment instruments are included for Assessors in the Assessment Guidelines of this Training Package.

Critical aspects of evidence required to demonstrate competency in this unit

9.2)

Before the critical aspects of evidence are considered all prerequisites must be met.

Evidence for competence in this unit shall be considered holistically. Each Element and associated performance criteria shall be demonstrated on at least two occasions in accordance with the 'Assessment Guidelines - UEE07 '. Evidence shall also comprise:

A representative body of work performance demonstrated within the timeframes typically expected of the discipline, work function and industrial environment. In particular this shall incorporate evidence that shows a candidate is able to:

Implement Occupational Health and Safety workplace procedures and practices including the use of risk control measures as specified in the performance criteria and range statement

Apply sustainable energy principles and practices as specified in the performance criteria and range statement

Demonstrate an understanding of the essential knowledge and associated skills as described in this unit. It may be required by some jurisdictions that RTOs provide a percentile graded result for the purpose of regulatory or licensing requirements.

Demonstrate an appropriate level of skills enabling employment

Conduct work observing the relevant Anti Discrimination legislation, regulations, polices and workplace procedures

Demonstrated consistent performance across a representative range of contexts from the prescribed items below:

Diagnose and rectify faults in refrigeration and air conditioning systems and components as described in 8) and including:

A

Using methodical fault finding techniques

B

Finding faults efficiently

C

Rectifying faults without damage

D

Providing written justification for the rectifications undertaken

E

Dealing with unplanned events by drawing on essential knowledge and skills to provide appropriate solutions incorporated in the holistic assessment with the above listed items

Note:
Successful completion of relevant vendor training may be used to contribute to evidence on which competency is deemed. In these cases the alignment of outcomes of vendor training with performance criteria and critical aspects of evidence shall be clearly identified

Context of and specific resources for assessment

9.3)

This unit should be assessed as it relates to normal work practice using procedures, information and resources typical of a workplace. This should include:

OHS policy and work procedures and instructions.

Suitable work environment, facilities, equipment and materials to undertake actual work as prescribed by this unit.

These should be part of the formal learning/assessment environment.

Note:

Where simulation is considered a suitable strategy for assessment, conditions must be authentic and as far as possible reproduce and replicate the workplace and be consistent with the approved industry simulation policy.

Evidence should show demonstrated competency in diagnosing and rectifying faults in refrigeration and air conditioning systems and components.

Method of assessment

9.4)

This unit shall be assessed by methods given in Volume 1, Part 3 'Assessment Guidelines'.

Note:
Competent performance with inherent safe working practices is expected in the Industry to which this unit applies. This requires assessment in a structured environment which is intended primarily for learning/assessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the essential knowledge and skills described in this unit.

Concurrent assessment and relationship with other units

9.5)

For optimisation of training and assessment effort, competency development in this unit may be arranged concurrently with unit:

UEENEEJ113A

Commission air conditioning and refrigeration systems

Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assignment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)

Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

7) This describes the essential skills and knowledge and their level, required for this unit.

Evidence shall show that knowledge has been acquired of safe working practices and diagnosing and rectifying faults in refrigeration and air conditioning systems and components.

All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies.

KS01-EJ111A Refrigeration and air conditioning systems fault diagnosis and repair

Evidence shall show an understanding of refrigeration and air conditioning system fault diagnosis and repair, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects:

T1 Preventative maintenance schedules and procedures.

T2 Normal and abnormal system and component operations including:

Systems design operating conditions

Overcharge and undercharge

High and low evaporator superheat

High and low condensing pressure

High and low evaporation pressure

High and low liquid sub-cooling

Low air/water flow rate through condenser and evaporator

Inefficient compressor

Open, closed and short circuits in motors and controls

T3 Finding and rectify system faults

Factors to consider in clarifying the nature of a fault including; initial fault report, confirmation of symptoms of the fault, comparison of symptoms with normal operation

Effect to cause reasoning — assumptions of possible causes

Methods for testing assumptions including; visual inspection, sectional testing, split-half tests, component isolation

Dealing with intermittent faults caused by vibration, shock, changes in temperature and electromagnetic interference.

Rectifying control system faults including adjustments, repairs and replacement of components, controls and accessories

T4 Diagnosing and rectifying faults on refrigeration and air conditioning systems including;

Appliance refrigerated systems

Cool room and freezer room systems

Merchandising and display cabinets

Residential air conditioning systems

Package air conditioning systems

8) This relates to the unit as a whole providing the range of contexts and conditions to which the performance criteria apply. It allows for different work environments and situations that will affect performance.

This unit must be demonstrated in relation to diagnosing and rectifying faults in the following refrigeration air conditioning systems and components:

Compressors

Condensers

Evaporators/cooling coils

Refrigerant flow controls

Refrigerant piping and accessories

Refrigeration systems

Cycling controls

Safety controls

Motors

At least one of the following apparatus:

Water systems, which includes cooling towers, evaporative condensers, evaporative coolers, hot water systems, chilled water systems, pumps, piping and associated equipment

Air distribution systems

At least three of the following systems

cool rooms

freezer rooms

merchandising and display cabinets

residential air conditioning systems

packaged or commercial air conditioning systems

industrial air conditioning systems

domestic refrigerators and freezers

Generic terms used throughout this Vocational Standard shall be regarded as part of the Range Statement in which competency is demonstrated. The definition of these and other terms that apply are given in Volume 2, Part 2.1.

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
OHS procedures for a given work area are identified, identified, obtained and understood 
OHS risk control measures and procedures in preparation for the work are followed. 
The nature of the fault is obtained from documentation and/or from work supervisor to establish the scope of work to be undertaken. 
Advice is sought from the work supervisor to ensure the work is coordinated effectively with others. 
Sources of materials that may be required for the work are accessed in accordance with established procedures. 
Tools, equipment and testing devices needed to carry out the work are obtained in accordance with established procedures and checked for correct operation and safety 
OHS risk control measures and procedures for carrying out the work are followed. 
The need to test or measure live and operating system is determined in strict accordance with OHS requirements and when necessary conducted within established safety procedures 
Circuits/machines/plant are checked as being isolated where necessary in strict accordance OHS requirements and procedures 
Fault finding is approached methodically drawing on knowledge of refrigeration and air conditioning systems using observation, measurement, calculations and comparison with normal system and component parameters/values. 
Faults beyond the scope of refrigeration and air conditioning work are identified. 
System components are removed/dismantled where necessary and parts stored to protect them against loss or damage 
Faulty components are rechecked and their fault status confirmed. 
Unexpected situations are dealt with safely and with the approval of an authorised person. 
Fault finding activities are carried out without damage to apparatus, circuits, the surrounding environment or services and using sustainable energy practices. 
OHS risk control measures and procedures for carrying out the work are followed. 
Arrangements are made for appropriately competent and authorised person to rectify faults that are beyond the scope of refrigeration and air conditioning work. 
Equipment is checked as being isolated where necessary in strict accordance OHS requirements and procedures 
Materials required to rectify faults are sourced and obtained in accordance with established procedures. 
Repairs are affected efficiently without damage to other components or apparatus and using sustainable energy principles. 
Effectiveness of the repair is tested in accordance with established procedures. 
System is reassembled and finally tested to ensure it is operating safely, effectively and complies with relevant requirements. 
OHS work completion risk control measures and procedures are followed. 
Work area is cleaned and made safe in accordance with established procedures. 
Written justification is made for repairs to circuits/apparatus. 

Forms

Assessment Cover Sheet

UEENEEJ111A - Diagnose and rectify faults in air conditioning and refrigeration systems and components
Assessment task 1: [title]

Student name:

Student ID:

I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

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Assessor name:

Signature:

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Assessment Record Sheet

UEENEEJ111A - Diagnose and rectify faults in air conditioning and refrigeration systems and components

Student name:

Student ID:

Assessment task 1: [title] Result: Competent Not yet competent

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

Assessor name:

Signature:

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Student signature:

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