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Elements and Performance Criteria

1. Prepare to diagnose and rectify faults
   • WHS/OHS hazards, risk control methods, relevant standards, codes and legislation are obtained and applied in accordance with workplace procedures
2. Details of the air conditioningor refrigerationsystem faultare obtained from documentation, clientand/or from supervisor to establish scope of work to be completed
3. Advice is sought from supervisor, as required, to ensure work is coordinated with others
4. Sources of materials required for work are accessed in accordance with workplace procedures
5. Tools, equipment and testing devices are obtained in accordance with workplace procedures and checked for operational safety
   • Need to test or measure live electrical work on an operating system is determined in accordance with workplace procedures and WHS/OHS requirements
6. Circuits/machines and/plant are checked as being isolated, where necessary, in accordance with workplace procedures and WHS/OHS requirements
7. Fault finding, using measured and calculated values of system and component parameters, is undertaken methodically in accordance with workplace procedures
8. Faults, beyond the scope of refrigeration and air conditioning system work, are identified and reported in accordance with workplace procedures
9. Control system components are dismantled, where necessary, and parts safely stored to protect them against loss or damage in accordance with workplace procedures
10. Faulty components are rechecked and fault status is confirmed
11. Unexpected situations are resolved in accordance with workplace procedures, safety guidelines and with the approval of an authorised person/supervisor
12. Fault-finding activities are completed without damage to apparatus, circuits, the surrounding environment and/or services using relevant sustainable energy practices in accordance with workplace procedures
    • Arrangements are made in accordance with workplace procedures for authorised person/s to rectify faults that are beyond the scope of refrigeration and air conditioning work
13. Equipment is checked as being isolated, where necessary, in accordance with workplace procedures and WHS/OHS requirements
14. Materials required are obtained in accordance with workplace procedures
15. Repairs are completed without damage to other components or apparatus using sustainable energy principles in accordance with workplace procedures
16. Effectiveness of repair work is tested in accordance with workplace procedures
17. Air conditioning and refrigeration control system is reassembled, given a final test and prepared for return to service in accordance with workplace procedures
18. Complete and report fault-finding and rectification activities
    • Work area is cleaned and made safe in accordance with workplace procedures
19. Report is completed in accordance with workplace procedures

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment. Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide.
Diagnosing and rectifying faults in air conditioning and refrigeration control systems must include at least the following:	two refrigeration and/or air conditioning control system four faults: open circuit short circuit incorrect connections insulation failure unsafe condition control apparatus/component failure related mechanical failure

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Performance Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least two separate occasions and include:

applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements, including: applying safe working practices using risk control measures completing and reporting fault-finding and rectification activities diagnosing and rectifying faults in refrigeration and air conditioning control systems, including: dealing with unplanned events/situations in accordance with workplace procedures in a manner that minimises risk to personnel and equipment finding at least four faults providing report for rectifications undertaken rectifying faults without damage using approved methodical fault-finding techniques implementing legislation, industry standards, codes of practice and regulations using manufacturer specifications and manuals.

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Knowledge Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

diagnose and rectify faults in refrigeration and air conditioning control systems, including: control systems and components method and procedures of finding, rectifying and recording control system faults refrigeration and air conditioning direct digital control applications and basic operation refrigeration and air conditioning electrical/electronic control types, applications, operation, installation/replacement, setting, adjustment and testing refrigeration and air conditioning pneumatic control applications and basic operation refrigeration and air conditioning process characteristics and control parameters system responses to parameter changes refrigeration and air conditioning direct digital control applications and basic operation relevant legislation, industry standards, codes of practice and regulations relevant manufacturer specifications relevant risk mitigation processes, including: potential hazards risk control measures safe working practices relevant WHS/OHS legislated requirements relevant workplace documentation relevant workplace policies and procedures WiFi/router controls for variable air volume (VAV) and remote access controls for refrigeration and air conditioning.

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