Repair and service carbon dioxide refrigeration systems

Formats and tools

Unit Description
Reconstruct the unit from the xml and display it as an HTML page.
Assessment Tool
an assessor resource that builds a framework for writing an assessment tool
Assessment Template
generate a spreadsheet for marking this unit in a classroom environment. Put student names in the top row and check them off as they demonstrate competenece for each of the unit's elements and performance criteria.
Assessment Matrix
a slightly different format than the assessment template. A spreadsheet with unit names, elements and performance criteria in separate columns. Put assessment names in column headings to track which performance criteria each one covers. Good for ensuring that you've covered every one of the performance criteria with your assessment instrument (all assessement tools together).
Wiki Markup
mark up the unit in a wiki markup codes, ready to copy and paste into a wiki page. The output will work in most wikis but is designed to work particularly well as a Wikiversity learning project.
Evidence Guide
create an evidence guide for workplace assessment and RPL applicants
Competency Mapping Template
Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners. A template for developing assessments for a unit, which will help you to create valid, fair and reliable assessments for the unit, ready to give to trainers and students
Observation Checklist
create an observation checklist for workplace assessment and RPL applicants. This is similar to the evidence guide above, but a little shorter and friendlier on your printer. You will also need to create a seperate Assessor Marking Guide for guidelines on gathering evidence and a list of key points for each activity observed using the unit's range statement, required skills and evidence required (see the unit's html page for details)

Self Assessment Survey
A form for students to assess thier current skill levels against each of the unit's performance criteria. Cut and paste into a web document or print and distribute in hard copy.
Moodle Outcomes
Create a csv file of the unit's performance criteria to import into a moodle course as outcomes, ready to associate with each of your assignments. Here's a quick 'how to' for importing these into moodle 2.x
Registered Training Organisations
Trying to find someone to train or assess you? This link lists all the RTOs that are currently registered to deliver UEENEEJ185A, 'Repair and service carbon dioxide refrigeration systems'.
Google Links
links to google searches, with filtering in place to maximise the usefulness of the returned results
Reference books for 'Repair and service carbon dioxide refrigeration systems' on This online store has a huge range of books, pretty reasonable prices, free delivery in Australia *and* they give a small commission to for every purchase, so go nuts :)

Elements and Performance Criteria




Prepare to service and repair carbon dioxide refrigeration systems


OHS procedures for a given work area are identified, obtained and understood through established routines and procedures


Established OHS risk control measures and procedures are followed in preparation for the work.


Safety hazards which have not previously been identified are reported and advice on risk control measures is sought from the work supervisor.


The nature of work is obtained from documentation 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 routines and procedures.


Tools, equipment and testing devices needed to carry out the work are obtained and checked for correct operation and safety


Service and repair carbon dioxide refrigeration systems.


Established OHS risk control measures and procedures for carrying out the work are followed.


Measuring system operating parameters is conducted in strict accordance with OHS requirements and established safety procedures


Checks are carried out to ensure the system or component parts are isolated, when necessary in strict accordance OHS requirements and procedures.


Refrigerant is removed from a system safely in accordance with regulatory requirements and industry practices.


Precautions are taken to prevent damage to components while pressure testing the system


Pressure testing is conducted at a pressure compatible with carbon dioxide and in accordance with standards


Leaks are located and rectified using testing methods appropriate to the system and in accordance with industry practices


System is evacuated to the required level and cleaned of all moisture and other contaminants in accordance with industry practices


System is charged safely with refrigerant grade carbon dioxide and compatible lubricants in accordance with industry practices


Established procedures are used to determine actual and specified range of operating conditions from measured and calculated values as they apply to sub critical carbon dioxide vapour compression and liquid recirculation/cascade systems.


Established methods for dealing with unexpected situations are discussed with appropriate person or persons and documented.


Unexpected situations are dealt with safely and with the approval of an authorised person.


Operating conditions are determined without damage to apparatus, circuits, the surrounding environment or services and using sustainable energy practices.


Complete work and report on servicing and repairing sub - critical carbon dioxide refrigeration systems.


OHS work completion risk control measures and procedures are followed.


Work site is cleaned and made safe in accordance with established procedures.


Contaminated refrigerant and lubricant is dealt with in accordance with legislative/regulatory requirements


Operation conditions are documented, including identification of any parameter that is not within the specified range for the system.


Work supervisor is notified of the completion of the work in accordance with established procedures.

Qualifications and Skillsets

UEENEEJ185A appears in the following qualifications:

  • UEE42911 - Certificate IV in Refrigeration and Air-conditioning Systems
  • UEE32211 - Certificate III in Air-conditioning and Refrigeration
  • UEE62511 - Advanced Diploma of Air-conditioning and Refrigeration Engineering
  • UEE42711 - Certificate IV in Air-conditioning and Refrigeration Servicing
  • UEE51211 - Diploma of Air-conditioning and Refrigeration Engineering

And the skillsets: