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Elements and Performance Criteria

1. Prepare to work on LV refrigeration and air conditioning circuits
   • WHS/OHS hazards, risk control methods, relevant standards, codes and legislation are obtained and applied
2. Work details are determined from documentation and/or supervisor to establish scope of work to be completed
3. Supervisor is consulted to ensure work is coordinated with others
4. Tools, equipment and testing devices required to locate faults are obtained in accordance with workplace procedures and checked for operational safety
5. Solve problems in LV refrigeration and air conditioning circuits
   • Need to test or measure live electrical work is determined in accordance with workplace procedures and WHS/OHS requirements
6. Equipment is checked and isolated as required in accordance with workplace procedures and WHS/OHS requirements
7. Measured and calculated values are used to resolve circuit problems, as they apply to single and multiple path electrical circuits in accordance with workplace procedures
8. Repair work is carried out in accordance with equipment or manufacturer requirements and workplace procedures
9. Unexpected situations are resolved in accordance with workplace procedures, safety guidelines and with the approval of an authorised person/supervisor
10. Fault-finding and repair activities are resolved without damage to apparatus, circuits, the surrounding environment and/or services using relevant sustainable energy practices in accordance with workplace procedures
11. Complete work and document activities
    • Worksite and equipment are cleaned and made safe in accordance with workplace procedures
12. Supervisor is notified of completion of work and relevant documentation 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.
Solving problems in LV refrigeration and air conditioning circuits must include at least the following:	single source series and a.c. circuits single source parallel and a.c. circuits

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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:

altering an existing circuit to comply with specified function and operating parameters applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements, including hazards and control measures completing work and documentation developing a circuit to comply with a specified function and operating parameters preparing to work on low voltage (LV) refrigeration and air conditioning circuits solving problems in single and multiple alternating current (a.c) circuits using meters/testers to check for continuity, insulation resistance and obtain resistance, voltage, current and capacitance values.

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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:

circuit protection and isolation devices used for circuit protection and circuit isolation, including fuses, circuit breakers, residual current devices (RCDs) and over/under voltage factors affecting resistance impedance parallel circuits and calculating equivalent circuit resistance and current power relevant standards, codes of practice and regulations single phase a.c. three phase a.c. types of magnetic devices, including relays, contractors, solenoids, transformers and motors types of meters/testers suitable for measuring capacitance types of meters/testers suitable for measuring current flow types of meters/testers suitable for measuring insulation resistance types of meters/testers suitable for measuring resistance values and circuit conductivity types of meters/testers suitable for measuring voltage types, uses and safety considerations of capacitors used in the refrigeration and air conditioning industry types, uses, and construction of transformers.

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