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Elements and Performance Criteria

1. Prepare to diagnose and rectify faults
   • Work health and safety (WHS)/occupational health and safety (OHS) processes and procedures for relevant work area are identified and applied in accordance with workplace procedures
2. Risk control measures are applied in accordance with workplace procedures prior to commencing work
3. Extent of work to be undertaken is determined from fault/breakdown reports and/or discussions with relevant person/s
4. Instructions for coordinating work with others is obtained from relevant person/s and applied
5. Materials required for the work are identified and accessed in accordance with workplace procedures
6. Tools, equipment and testing devices required to locate faults are obtained in accordance with workplace procedures and checked for correct operation and safety
7. Diagnose and rectify faults in RE control systems
   • Workplace risk control measures and procedures are applied
8. Need to test or measure live electrical work is determined in accordance with WHS/OHS requirements and conducted in accordance with workplace procedures
9. Circuits/machines/plant are isolated in accordance with WHS/OHS requirements and workplace procedures
10. Safety hazards resulting from the fault or breakdown are documented and risk control measures identified and implemented in consultation with relevant person/s
11. Fault finding of RE systems and interconnecting circuits is approached methodically using measured and calculated values of circuit/apparatus parameters
12. Circuit/apparatus components are dismantled, as required, and parts stored to protect against loss or damage
13. Faulty circuits/components are rechecked and their fault status confirmed
14. Materials/replacement parts required to rectify faults are sourced and obtained in accordance with workplace procedures
15. Effectiveness of repair is tested in accordance with workplace procedures
16. Apparatus is reassembled, tested and prepared for return to service
17. Unexpected events are dealt with safely and with approval of authorised person/s
18. Fault-finding and repair activities are completed without damage to apparatus, circuits, the surrounding environment and services using sustainable energy practices
19. Complete and report fault-finding and repair activities
    • Workplace risk control measures and procedures are applied
20. Work area is cleaned and made safe in accordance with workplace procedures
21. Justification for repairs to apparatus is documented in accordance with workplace procedures
22. Work completion is documented and relevant person/s notified 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.
RE system fault finding and repairing must include at least four of the following:	open circuit short circuit incorrect connections insulation failure unsafe condition 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 one occasion and include:

envisaging the likely extent of work from fault/breakdown reports and discussions with appropriate person/s using methodical fault-finding techniques finding faults efficiently rectifying faults effectively completing documentation correctly dealing with unplanned events applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures and practices, including the use of risk control measures applying sustainable energy principles and practices checking isolation of circuits/machines/system determining live electrical testing/measurement requirements dismantling and reassembling circuit/apparatus components identifying and accessing materials, tools, equipment and testing devices testing repairs.

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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:

renewable energy (RE) system electronics, including: fault-finding techniques encompassing: factors to consider in clarifying the nature of a fault: 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: visual inspection sectional testing split-half tests component isolation dealing with intermittent faults semiconductor components encompassing: symbols for common semiconductor components, including rectifier diodes, light-emitting diodes (LEDs), zener diodes, bipolar transistors, darlington pairs, MOSFETs, IGBTs, SCRs and triacs basic function of these devices above major rating parameters of devices above applications for each device I-V curve characteristics of diodes and the current gain characteristic of bipolar transistors linear regulated direct current (d.c.) power supplies encompassing: label circuit diagrams for half wave and full wave, single phase and three phase rectifiers voltage and current waveforms for these rectifier circuits with and without capacitor filtering peak output voltages from single phase and three phase rectifier circuits block diagram showing the structure of a regulated d.c. power supply main features of linear integrated circuit and voltage regulator integrated circuits each of the major components and their physical location in a regulated power supply switching power control circuits encompassing: power dissipation of a transistor when operated as a switch how pulse width modulation (PWM) can provide a variable output voltage from a switch mode regulator advantages and disadvantages of switch mode power circuits compared with linear power circuits block diagram of a basic photovoltaic (PV) switching voltage regulator for battery charging applications of switch mode circuits found in RE systems how power control in alternating current (a.c.) circuits is achieved using SCRs and triacs methods used to reduce radio frequency interference (RFI) in d.c. and a.c. circuits utilising high-speed switching digital electronic circuits encompassing: characteristic features that distinguish analogue and digital devices and circuits how numbers or text information can be represented using binary numbers and how these are represented in digital circuits operation of voltage comparators, analogue to digital (A-D) converters, and digital to analogue (D-A) converters, and examples of each one's use in a RE application basic function of microcontrollers, volatile and non-volatile memory devices operation of a solar hot water (SHW) system pump differential controller as an example of the use of logic in digital circuits inverters encompassing: basic function of inverters and d.c converters and their use in RE systems the operation of an inverter bridge and half-bridge output voltage waveforms for square wave, modified square wave and synthesised sine wave inverters showing typical voltages and timing the function of PWM techniques in modified square wave and synthesised sine wave inverters block diagrams showing the structure of common forms of d.c converters and inverters used in RE applications maintenance encompassing: safety procedures for work on electronic systems, circuits and apparatus hazards that may be encountered when performing tests on inverters, battery chargers or other equipment containing low voltage (LV) circuits functionality of electronic equipment through appropriate client questioning and application of systematic tests and observation various types of common faults and their causes in RE electronic equipment typical test equipment used to repair electronic and electrical equipment safe and correct use of tools and test equipment to locate electronic equipment faults under the direction of an electronics technician replacement of circuit boards, observing appropriate handling precautions for static sensitive devices replacement of socketed integrated circuits such as EPROMs or microprocessors using appropriate tools and methods relevant manufacturer specifications relevant safe work method statements (SWMS)/job safety assessments or risk mitigation processes relevant WHS/OHS legislated requirements relevant workplace documentation relevant workplace policies and procedures RE control systems.

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