This describes the essential skills and knowledge and their level required for this unit

Evidence shall show that knowledge has been acquired of safe working practices and finding and rectifying faults in appliance motors and associated controls

All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies

KSEJA Refrigeration and air conditioning motors and associated controls

Evidence shall show an understanding of refrigeration and air conditioning motors and associated controls applying safe working practices and relevant Standards Codes and Regulations to an extent indicated by the following aspects

T Three phase induction motors

Revise the principles of electromagnetism

Phase sequence

Three phase induction motor action

Induction motor construction

stator construction

rotor construction

Speed and slip

Line and phase voltages

Terminal block markings

Motor nameplate details

Motor rating

Star and Delta connections

Electrical isolation

Electrical testing and fault finding

Rotation reversal

Maintenance requirements

T Three phase motor starters

Types of three phase induction motor starters

Directonline motor starters

characteristics applications and limitations

line and control voltages

connection testing and fault finding

Other motor starters characteristics applications and limitations

Stardelta

Autotransformer

Part winding

Solid State soft start

T Three phase motor protection devices

Motor protection

Motor protection devices

star point overloads

Types of protection devices

fuses and circuit breakers

thermal overload

magnetic overload

under voltage and overvoltage relays

electronic motor protection

Isolation devices

Timers

Environmental protection

Fault finding in three phase motor installations

Motor circuit faults

T Split phase single phase motors and starters

Split phase single phase motors

Development of starting torque in split phase induction motors

Winding characteristics

Construction details

Starting

centrifugal switch

current coil relay

solid state relay

Characteristics of a split phase motor

advantages

disadvantage

rating

speed

reversal

Testing and fault finding

T Capacitor and shaded pole single phase motor and starters

Capacitor start motors

Characteristics

Switching mechanism

Applications

Motor reversal

Capacitor startcapacitor run motors

Characteristics

Switching mechanism

Applications

Motor reversal

Permanently split capacitor motors

Characteristics

Applications

Motor reversal

Capacitors

Shaded pole induction motors

Advantages

Disadvantages

Reversal

Applications

Motor faults and fault finding

Capacitor start types

Shaded pole motor type

T Series universal single phase motors

Basic motor principles

Commutation

Electromagnet field system

Reversal

Supply types ac dc

Construction

Characteristics

Applications

Reversal

Faults

Synchronous motor

T Single phase motor protection devices

Motor protection

Environmental

Overheating

Thermal overload relay

Thermal disc overload

Internal overload

Protection against open circuit under voltage and automatic restarting

Testing and fault finding

T Single phase motor speed control devices

Speed control methods

Pole changing method

Voltage control method

Inverter

The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria Required Skills and Knowledge the Range Statement and the Assessment Guidelines for this Training Package

The Evidence Guide forms an integral part of this Unit It must be used in conjunction with all parts of this unit and performed in accordance with the Assessment Guidelines of this Training Package

Overview of Assessment

Longitudinal competency development approaches to assessment such as Profiling require data to be reliably gathered in a form that can be consistently interpreted over time This approach is best utilised in Apprenticeship programs and reduces assessment intervention It is the industrypreferred model for apprenticeships However where summative or final assessment is used it is to include the application of the competency in the normal work environment or at a minimum the application of the competency in a realistically simulated work environment In some circumstances assessment in part or full can occur outside the workplace However it must be in accordance with industry and regulatory policy

Methods chosen for a particular assessment will be influenced by various factors These include the extent of the assessment the most effective locations for the assessment activities to take place access to physical resources additional safety measures that may be required and the critical nature of the competencies being assessed

The critical safety nature of working with electricity electrical equipment gas or any other hazardous substancematerial carries risk in deeming a person competent Sources of evidence need to be rich in nature to minimise error in judgment

Activities associated with normal everyday work influence decisions about howhow much the data gathered will contribute to its richness Some skills are more critical to safety and operational requirements while the same skills may be more or less frequently practised These points are raised for the assessors to consider when choosing an assessment method and developing assessment instruments Sample assessment instruments are included for Assessors in the Assessment Guidelines of this Training Package

Critical aspects of evidence required to demonstrate competency in this unit

Before the critical aspects of evidence are considered all prerequisites must be met

Evidence for competence in this unit shall be considered holistically Each Element and associated performance criteria shall be demonstrated on at least two occasions in accordance with the Assessment Guidelines UEE Evidence shall also comprise

Evidence for competence in this unit shall be considered holistically. Each Element and associated performance criteria shall be demonstrated on at least two occasions in accordance with the 'Assessment Guidelines - UEE07 '. Evidence shall also comprise:

A representative body of work performance demonstrated within the timeframes typically expected of the discipline work function and industrial environment In particular this shall incorporate evidence that shows a candidate is able to

Implement Occupational Health and Safety workplace procedures and practices including the use of risk control measures as specified in the performance criteria and range statement

Apply sustainable energy principles and practices as specified in the performance criteria and range statement

Demonstrate an understanding of the essential knowledge and associated skills as described in this unit It may be required by some jurisdictions that RTOs provide a percentile graded result for the purpose of regulatory or licensing requirements

Demonstrate an appropriate level of skills enabling employment

Conduct work observing the relevant Anti Discrimination legislation regulations polices and workplace procedures

Demonstrated consistent performance across a representative range of contexts from the prescribed items below

Find and rectify faults in refrigeration and air conditioning system motors and associated controls as described in and including

A

Envisaging the likely extent of work from faultbreakdown reports and discussion with appropriate persons

B

Using methodical fault finding techniques

C

Finding faults efficiently

D

Rectifying faults effectively

E

Completing documentation correctly

F

Dealing with unplanned events by drawing on essential knowledge and skills to provide appropriate solutions incorporated in the holistic assessment with the above listed items

Context of and specific resources for assessment

This unit should be assessed as it relates to normal work practice using procedures information and resources typical of a workplace This should include

OHS policy and work procedures and instructions

Suitable work environment facilities equipment and materials to undertake actual work as prescribed by this unit

These should be part of the formal learningassessment environment

Note

Where simulation is considered a suitable strategy for assessment conditions must be authentic and as far as possible reproduce and replicate the workplace and be consistent with the approved industry simulation policy

Evidence should show demonstrated competency in finding and rectifying faults in appliance motors and associated controls

Method of assessment

This unit shall be assessed by methods given in Volume Part Assessment Guidelines

Note Competent performance with inherent safe working practices is expected in the Industry to which this unit applies This requires assessment in a structured environment which is intended primarily for learningassessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the essential knowledge and skills described in this unit

Note:
Competent performance with inherent safe working practices is expected in the Industry to which this unit applies. This requires assessment in a structured environment which is intended primarily for learning/assessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the essential knowledge and skills described in this unit.

Concurrent assessment and relationship with other units

There are no concurrent assessment recommendations for this unit