NZQA Expiring unit standard
20605 version 3
Page 1 of 4
Title
Diagnose pneumatic power system faults under supervision
Level
3
Credits
10
Purpose
People credited with this unit standard are able to, under
supervision: prepare to diagnose faults; carry out fault
diagnoses; and evaluate fault diagnoses in a pneumatic power
system.
Classification
Mechanical Engineering > Fluid Power - Pneumatics
Available grade
Achieved
Entry information
Critical health and
safety prerequisites
Unit 2728, Service pneumatic power system components under
supervision, or demonstrate equivalent knowledge and skills.
Explanatory notes
1
Candidates must comply with legislation applicable to this unit standard which
includes Health and Safety in Employment Act 1992.
2
Assessment across all outcomes requires the candidate to diagnose a minimum of
four different faults, under supervision, over a range of air production and air
consumption components. This may require a reasonable period of time to enable
the occurrence of faults relevant to this unit standard.
3
Definitions
Components, in the context of this unit standard, may include but are not limited to
filters, breathers, lubricators, tubing and piping, valves, cylinders, controllers, and
motors.
Fault refers to a defect in the system or components of the system that results in
deviation from original specifications, and which requires repair to bring the system
back to normal performance. Examples of pneumatic system faults at this level may
include but are not limited to blocked filters, sticking valves, worn actuators, and
misaligned sensors.
PPE refers to personal protective equipment and may include but is not limited to
protective clothing, gloves, safety glasses, headwear, footwear, hearing protection,
and safety devices.
Worksite procedures refer to documents that include: worksite rules, codes, and
practices; equipment operating instructions and maintenance schedules;
documented quality management systems; and health and safety requirements.
Competenz
SSB Code 8104
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
20605 version 3
Page 2 of 4
Outcomes and evidence requirements
Outcome 1
Prepare to diagnose pneumatic power system faults.
Evidence requirements
1.1
Documentation is obtained relevant to the system.
Range
1.2
may include but is not limited to - operating manual, circuit
drawings, step displacement diagram, malfunction report,
historical records.
Initial safety precautions are taken in accordance with worksite procedures.
Range
may include but is not limited to - advice to personnel, tags,
lockout, PPE.
1.3
System performance is measured against specifications and historical data, and
non-performance is confirmed with supervisor.
1.4
Preliminary assessment is made to establish the nature of the fault.
Range
1.5
relative to the principal fault categories of flow or pressure.
Tools and equipment are prepared in accordance with the system type and fault
category.
Outcome 2
Carry out pneumatic power system fault diagnoses.
Evidence requirements
2.1
Full system safety is established prior to further diagnostics activity.
Range
2.2
Tools and equipment are selected as per the diagnostic task and fault category.
Range
2.3
may include but is not limited to - flow meter, pressure gauge.
Fault diagnosis is carried out in a logical and systematic manner in accordance
with worksite procedures.
Range
2.4
may include but is not limited to - isolation, depressurisation.
machine type, fault category, consultation with users, step
displacement diagram.
Isolated faults are correctly diagnosed and recorded in accordance with
worksite procedures.
Competenz
SSB Code 8104
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
20605 version 3
Page 3 of 4
Outcome 3
Evaluate pneumatic power system fault diagnoses under supervision.
Evidence requirements
3.1
The significance of system variance from original specification is determined.
Range
3.2
may include but is not limited to - costs, machine and personal
safety, trends, time out of service, correct machine operation,
factors contributing to failure.
Faulty parts are referred for repair or replacement in accordance with worksite
procedures.
Range
may include but is not limited to - maintenance personnel,
specialist services.
Replacement information
This unit standard and unit standard 20606 replaced unit
standard 2734.
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
25 May 2004
31 December 2015
Review
2
18 March 2011
31 December 2017
Rollover
3
15 October 2015
31 December 2017
Consent and Moderation Requirements (CMR) reference
0013
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA, or
an inter-institutional body with delegated authority for quality assurance, before they can
report credits from assessment against unit standards or deliver courses of study leading
to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Competenz
SSB Code 8104
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
20605 version 3
Page 4 of 4
Consent requirements and an outline of the moderation system that applies to this
standard are outlined in the CMRs. The CMR also includes useful information about
special requirements for organisations wishing to develop education and training
programmes, such as minimum qualifications for tutors and assessors, and special
resource requirements.
Competenz
SSB Code 8104
 New Zealand Qualifications Authority 2016