This unit involves the skills and knowledge required to diagnose and repair faults in power generation plant inverter systems, including associated accessories, components and wiring systems.

The diagnosis and repair of inverter system faults requires the inspection, repair and verification to ensure that it is working efficiently and meeting operational requirements.

Competency in this unit requires the ability to plan work, verify fault, find fault, determine cause of fault, repair fault and complete all work tasks. Individuals will, in general, work under supervision in an electrical, electronic and/or mechanical equipment repair workshop or on site.

Power generation maintenance personnel are typically trained and authorised to receive permits to work.

No licensing, legislative or certification requirements apply to this unit at the time of publication.

Note: Workplace practice

The application of the skills and knowledge described in this unit of competency may require a licence or training permit to practice in the workplace, where work is carried out on gas and electrical installations. Additional and/or other conditions may apply under state and territory legislative and regulatory licensing requirements.

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Plan and prepare for work

1.1

Requirements including scope of work and assigned roles are identified and confirmed with appropriate personnel or by site inspection, in accordance with workplace procedures

1.2

Work, Health and Safety (WHS)/Occupational Health and Safety (OHS) regulations, legislative requirements, industry standards, codes of practice, manufacturers’ specifications, environmental obligations and workplace procedures are reviewed in preparation for work

1.3

Resources are obtained and inspected for compliance with job specifications

1.4

Relevant plans, drawings and manuals are selected and used, in accordance with workplace procedures

1.5

Correct quantity of materials and components for work are obtained and inspected for compliance with job specification

1.6

Work is planned, sequenced and prioritised, in accordance with workplace procedures

1.7

Potential hazards are identified and risk control measures are selected and implemented, in accordance with workplace procedures

1.8

Work area is prepared, in accordance with workplace procedures

2

Verify fault

2.1

Normal performance and function of inverter system equipment is ascertained by consulting appropriate personnel and reference sources, in accordance with workplace procedures

2.2

Fault indicators, technical information and diagnostic techniques are used to verify reported faults, in accordance with workplace procedures

2.3

Faults are reproduced and monitored, if possible, in accordance with workplace procedures

3

Find fault

3.1

Isolations are confirmed, where appropriate, in accordance with workplace procedures

3.2

Equipment components, wires and terminations are inspected for faults, in accordance with workplace procedures

3.3

Diagnostic techniques are selected and used, in accordance with workplace procedures

3.4

Components are disconnected to enable accurate test measurements of suspected faulty components, without concern of back feed readings, in accordance with workplace procedures

3.5

Test and measurement instruments are used, in accordance with workplace procedures and manufacturers' instructions

4

Determine cause of fault

4.1

Appropriate personnel are consulted to obtain details relating to faulty system, in accordance with workplace procedures

4.2

Use is made of information from fault indicators and maintenance records, in accordance with workplace procedures

4.3

Conclusions about nature and cause of fault are reached from analysis of available evidence, in accordance with workplace procedures

5

Repair fault

5.1

Isolations are confirmed, where appropriate, in accordance with workplace procedures

5.2

Faulty, worn or damaged components are replaced or repaired, in accordance with workplace procedures

5.3

Parts and components are selected and used, in accordance with manufacturers' specifications and workplace procedures

5.4

Inverter system components are disconnected for testing and are reconnected having been proven free of faults, and all terminations are then checked to ensure they are electrically and mechanically sound, in accordance with workplace procedures

5.5

Faults are repaired, in accordance with workplace procedures

5.6

Final inspection is performed, in accordance with workplace procedures

6

Complete work

6.1

Work is completed and appropriate personnel are notified, in accordance with workplace procedures

6.2

Work area is cleared of waste, cleaned, restored and secured, in accordance with workplace procedures

6.3

Tools and equipment are maintained and stored, in accordance with workplace procedures

6.4

Work completion details are finalised, in accordance with workplace procedures

Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

Range is restricted to essential operating conditions and any other variables essential to the work environment.

Non-essential conditions may be found in the Companion Volume Implementation Guide.

Electricity generation

Maintenance