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Scenario · Wind and Hydro Operations

Fault find a pitch system and complete a six monthly turbine service

You are a Wind Turbine Technician on the Ridgeback crew.

Intermediate3 to 4 hours7 tasks
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The situation

What has happened

WTG-05 has faulted three times this week on pitch fault code 412 on blade B and is sitting in pause. Work order WO-26-5131 asks for a check of the hydraulic pressure, the proximity sensor and the accumulator. The turbine is also due for its six monthly service, and Ben Carrington wants both done in one visit to save a climb. A weather front is due on Friday with wind speeds above the working limit. The control room must record the turbine out of service and the permit must show the rotor lock and the 33 kilovolt isolation. Two technicians are required in the nacelle.

Your brief. Plan the visit to the routine maintenance procedure, isolate the turbine under permit, fault find the pitch system, complete the six monthly task list, return the turbine to automatic operation and record the readings and results in the work order and the Operations Log.
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Tasks

Deliverables

  • Visit plan
  • Permit record with isolations
  • Work order with service results and fault finding
  • Operations Log entries

Documents to use

Systems to use

Permit and Isolation Register

Records every permit to work and its isolations from request through issue, work, restoration and close out.

Maintenance Work Orders and Defects

Holds every defect raised and every planned and corrective maintenance work order across the three sites with priority, crew and completion records.

Operations Log

The control room's chronological record of plant events, starts, shutdowns, alarms, operational checks, readings and instructions across all three sites.

For trainers and assessors

Units of competency

Current on training.gov.au for the Electricity Supply Industry - Generation Sector Training Package as at 10 September 2026.

UEPMNT009Maintain large scale wind turbines
UEPMNT005Diagnose and repair faults in wind turbine control systems
UEPOPS016Conduct routine wind turbine maintenance
UEPMNT013Monitor climatic conditions for renewable electricity generation
UEPMNT002Carry out routine work activities in an ESI large scale wind generation environment

Qualifications

UEP40622Certificate IV in Wind Power Generation
Assessor notes

What to look for

Evidence guide

Check that the plan respects wind limits and the two person rule, that the permit shows the rotor lock and a proven electrical isolation, that the fault finding sequence uses the controller fault log and the hydraulic readings, and that service results are recorded with values. Return to service must include the self test and control room release. A defect outside scope must be raised separately, not buried.

The student's evidence summary lists every record they created or changed in the systems named above, their notes and the tasks they ticked. Verify it against the deliverables and your own assessment tool.