COMPETENCY STANDARD

FOR
Refrigeration and Air Conditioning
Level: 4

(Light Engineering Sector)

Code: CS-LE-RAC-L3-EN-V1

National Skills Development Authority

Prime Minister’s Office
Government of the People’s Republic of Bangladesh
Copyright

National Skills Development Authority

Prime Minister's Office
Level: 10-11, Biniyog Bhaban,
E-6 / B, Agargaon, Sher-E-Bangla Nagar Dhaka-1207, Bangladesh.
Email: ec@nsda.gov.bd
Website: www.nsda.gov.bd.
National Skills Portal: http:\\skillsportal.gov.bd

National Skills Development Authority (NSDA) is the owner of this document. Other interested parties
must obtain written permission from NSDA for reproduction of information in any manner, in whole
or in part, of this Competency Standard, in English or other language.

This Competency Standard for Refrigeration and Air Conditioning is a document for the development
of curricula, teaching and learning materials, and assessment tools. It also serves as the document for
providing training consistent with the requirements of industry in order to meet the qualification of
individuals who graduated through the established standard via competency-based assessment for a
relevant job.

This document has been developed by NSDA in association with Light Engineering Sector, industry
representatives, academia, related specialist, trainer and related employee.

Public and private institutions may use the information contained in this standard for activities
benefitting Bangladesh.

i
Introduction
The NSDA aims to enhance an individual’s employability by certifying completeness with skills.
NSDA works to expand the skilling capacity of identified public and private training providers
qualitatively and quantitatively. It also aims to establish and operationalize a responsive skills
ecosystem and delivery mechanism through a combination of well-defined set of mechanisms and
necessary technical supports.

Key priority economic growth sectors identified by the government have been targeted by NSDA to
improve current job skills along with existing workforce to ensure required skills to industry standards.
Training providers are encouraged and supported to work with industry to address identified skills and
knowledge to enable industry growth and increased employment through the provision of market
responsive inclusive skills training program. "Refrigeration and Air Conditioning" is selected as one
of the priority occupations of Light Engineering Sector. This standard is developed to adopt a demand
driven approach to training with effective inputs from Industry Skills Councils (ISC’s), employer
associations and employers.

Generally, a competency standard informs curriculum, learning materials, assessment and certification
of trainees enrolled in Skills Training. Trainees who successfully pass the assessment will receive a
qualification in the National Skills Qualification Framework (NSQF) under Bangladesh National
Qualification Framework and will be listed on the NSDA’s online portal.

This competency standard is developed to improve skills and knowledge in accordance with the job
roles, duties and tasks of the occupation and ensure that the required skills and knowledge are aligned
to industry requirements. A series of stakeholder consultations, workshops were held to develop this
document.

The document also details the format, sequencing, wording and layout of the Competency Standard for
an occupation which is comprised of Units of Competence and its corresponding Elements.

ii
Overview

A competency standard is a written specification of the knowledge, skills and attitudes required for the
performance of an occupation, trade or job corresponding to the industry standard of performance
required in the workplace.
The purpose of a competency standards is to:
▪ provide a consistent and reliable set of components for training, recognising and assessing
people’s skills, and may also have optional support materials
▪ enable industry recognised qualifications to be awarded through direct assessment of workplace
competencies
▪ encourage the development and delivery of flexible training which suits individual and industry
requirements
▪ encourage learning and assessment in a work-related environment which leads to verifiable
workplace outcomes
Competency standards are developed by a working group comprised of representative from NSDA,
Key Institutions, ISC, and industry experts to identify the competencies required of an occupation in
Informal Sector.
Competency standards describe the skills, knowledge and attitude needed to perform effectively in the
workplace. CS acknowledge that people can achieve technical and vocational competency in many
ways by emphasizing what the learner can do, not how or where they learned to do it.
With competency standards, training and assessment may be conducted at the workplace or at training
institute or any combination of these.
Competency standards consist of a number of units of competency. A unit of competency describes a
distinct work activity that would normally be undertaken by one person in accordance with industry
standards.
Units of competency are documented in a standard format that comprises of:
▪ unit title
▪ nominal duration
▪ unit code
▪ unit descriptor
▪ elements and performance criteria
▪ variables and range statement
▪ curricular content guide
▪ assessment evidence guide
Together, all the parts of a unit of competency:
▪ describe a work activity
▪ guide the assessor to determine whether the candidate is competent or not yet competent
The ensuing sections of this document comprise of a description of the relevant occupation, trade or job
with all the key components of a unit of competency, including:
▪ a chart with an overview of all Units of Competency for the relevant occupation, trade or job
including the Unit Codes and the Unit of Competency titles and corresponding Elements
▪ the Competency Standard that includes the Unit of Competency, Unit Descriptor, Elements and
Performance Criteria, Range of Variables, Curricular Content Guide and Assessment Evidence
Guide.

iii
 Competency Standards for National Skill Certificate, Level-4 in
Refrigeration and Air Conditioning in Light Engineering Sector

Level Descriptors of NSQF (BNQF 1-6)

Level & Job Knowledge Domain Skills Domain Responsibility Domain

classification

Specialised and wider range of

Comprehensive actual and
cognitive and practical skills required Work under broad guidance and self-
theoretical knowledge within a
to provide leadership in the motivation to execute strategic and
6-Mid-Level specific work or study area
development of creative solutions to operational plan/s. Lead lower-level
Manager/ Sub with an awareness of the
defined problems. Communicate management. Diagnose and resolve
Assistant Engineer validity and limits of that
professional issues and solutions to problems within and among work
knowledge, able to analyse,
the team and to external groups.
compare, relate and evaluate.
partners/users.
Broad knowledge of the Broad range of cognitive and
Work under guidance of management
underlying, concepts, practical skills required to generate
and self-direction to resolve specific
principles, and processes in a solutions to specific problems in one
issues. Lead and take responsibility
5-Supervisor specific work or study area, or more work or study areas.
for the work and actions of
able to scrutinize and break Communicate practice-related
group/team members. Bridge between
information into parts by problems and possible solutions to
management.
identifying motives or causes. external partners.
A range of cognitive and practical
skills required to accomplish tasks
Broader knowledge of the
and solve problems by selecting and Work under minimal supervision in
underlying, concepts,
applying the full range of methods, specific contexts in response to
principles, and processes in a
4-Highly Skilled tools, materials and information. workplace requirements. Resolve
specific work or study area,
Worker Communicate using technical technical issues in response to
able to solve problems to new
terminology and IT technology with workplace requirements and
situations by comparing and
partners and users as per workplace lead/guide a team/ group.
applying acquired knowledge.
requirements.

Basic cognitive and practical skills

required to use relevant
Moderately broad knowledge
information in order to carry out
in a specific work or study Work or study under supervision with
tasks and to solve routine problems
area, able to perceive ideas considerable autonomy. Participate in
3-Skilled Worker using simple rules and tools.
and abstract from drawing and teams and responsible for group
Communicate with his team and
design according to workplace coordination.
limited external partners upholding
requirements.
the values, nature and culture of the
workplace
2-Semi Skilled Basic understanding of
Skills required to carry out simple
Worker underpinning knowledge in a
tasks, communicate with his team Work or study under supervision in a
specific work or study area,
in the workplace presenting and structured context with limited scope
able to interpret and apply
discussing results of his work with of manipulation
common occupational terms
required clarity.
and instructions.
Elementary understanding of
Specific Basic skills required to
ability to interpret the
carry out simple tasks. Interpret
underpinning knowledge in a Work under direct supervision in a
1 –Basic Skilled occupational terms and present the
specific study area, able to structured context with limited range
Worker results of own work within guided
interpret common of responsibilities.
work environment/ under
occupational terms and
supervision.
instructions.

iv
List of Abbreviations

CS Competency Standard

ISC Industry Skills Council

NSDA National Skills Development Authority

NSQF National Skills Qualifications Framework

OSH Occupational Safety and Health

PPE Personal Protective Equipment

SCVC Standards and Curriculum Validation Committee

STP Skills Training Provider

SOP Standard Operating Procedure

UoC Unit of Competency

v
vi
 Approved by
------- Executive Committee (EC) Meeting of NSDA
Held on ---------

vii
viii
 Table of Contents

Copyright .............................................................................................................................. i
Introduction ........................................................................................................................... ii
Overview .............................................................................................................................. iii
Level Descriptors of NSQF (BNQF 1-6) .......................................................................... iv
List of Abbreviations ...........................................................................................................v
Course Structure ..................................................................................................................1
Units & Elements at Glance ...................................................................................................2
Generic Units of Competencies .......................................................................................... 4
Sector Specific Units of Competencies .............................................................................. 5
Occupation Specific Units of Competencies ..................................................................... 6
OURAC001L4V1: Apply Quality Systems and Procedures .................................................7
OURAC002L4V1: Service and Maintain Precision Air Conditioning Unit........................11
OURAC003L4V1: Troubleshoot Precision Type Air Conditioning Unit ...........................16
OURAC004L4V1: Repair and Install Prefabricated Cold Room and Freezer Rooms ........19
OURAC005L4V1: Check and Inspect Variable Refrigerant Flow (VRF) / Variable
Refrigerant Volume (VRV) System .....................................................................................23
OURAC006L4V1: Prepare Estimate for Repair, Installations and Maintenance of
Refrigeration and Air Conditioning Systems .......................................................................26
OURAC007L4V1: Troubleshoot Transport Refrigeration Unit ..........................................31
Development of Competency Standard by Technical Sub-Committee (TSC) ..................... 34
Validation of Competency Standard by Standard and Curriculum Validation Committee
(SCVC) ............................................................................................................................................ 35
Re-Review of Competency Standard ......................................................................................... 35

ix
0
 Competency Standards for National Skill Certificate, Level-4 in
Refrigeration and Air Conditioning in Light Engineering Sector
Course Structure

SL UOC Nominal
Unit code and Title
No Level (hours)
Generic Units of Competencies
Sector Specific Units of Competencies

Occupation Specific Units of Competencies

Apply Quality Systems and
1. OURAC001L4V1 4 20
Procedures
Service & Maintain Precision
2. OURAC002L4V1 4 60
Air-Conditioning Unit
Troubleshoot Precision Air-
3. OURAC003L4V1 4 40
Conditioning Unit
Repair & Install Prefabricated
4. OURAC004L4V1 4 60
Cold Rooms/Freezer Rooms
Check & Inspect Variable
Refrigerant Flow
5. OURAC005L4V1 4 20
(VRF)/Variable Refrigerant
Volume (VRV) System
Prepare estimation for Repair,
6. OURAC006L4V1 installations and maintenance of 4 20
RAC Systems
Troubleshoot Transport Air-
7. OURAC007L4V1 4 40
Conditioning System
Sub Total 260

Total Duration 260

1
Units & Elements at Glance

Generic Competencies

Sector specific competencies

Occupation specific competencies

Code Unit of Elements of competency Duration
competency (hours)
1. Work within quality system
2. Apply and monitor
improvement of quality
Apply Quality
system in the workplace
OURAC001L4V1 Systems and 20
3. Take responsibility for quality
Procedures
work
4. Apply standard procedures for
each job
1. Prepare for maintenance
activities
2. Inspect and adjust air-
Service and conditioning controls,
Maintain parameters, and operating
OURAC001L4V1 conditions 60
Precision Air
Conditioning Unit 3. Maintain lubrication system of
precision air conditioner
4. Maintain Refrigeration System
5. Maintain air distribution system
1. Plan and prepare for
troubleshooting
2. Identify and repair fault or
Troubleshoot
problems
Precision Type
OURAC003L4V1 3. Perform refrigerant 40
Air Conditioning
recovery/recycling and
Unit
retrofitting
4. Observe performance of repaired
or troubleshoot unit
1. Identify the selected design of
cold room and freezer room
Repair and Install 2. Install cold room and freezer
Prefabricated room
OURAC004L4V1 60
Cold Room and 3. Prepare to repair cold room and
Freezer Rooms freezer room
4. Maintain / repair cold room and
freezer room

2
 Check and 1. Prepare to test and inspect
Inspect Variable VRF/VRV air-conditioning
Refrigerant Flow system
OURAC005L4V1 (VRF) / Variable 2. Check and Inspect VRF/VRV 20
Refrigerant air-conditioning system
Volume (VRV) 3. Complete and report Checking
System and Inspection activities
1. Prepare estimate for repair &
maintenance works
Prepare Estimate
2. Prepare estimate for installation
for Repair,
of air conditioning systems
Installations and
3. Prepare estimate for new
OURAC006L4V1 Maintenance of 20
installation of Refrigeration
Refrigeration and
systems
Air Conditioning
4. Prepare an estimate of
Systems
relocation of Refrigeration and
Air Conditioning Systems
1. Prepare for maintenance
activities
2. Identify and repair faults/
Troubleshoot
troubles
Transport
OURAC007L4V1 3. Perform refrigerant recovery, 40
Refrigeration
recycling and retrofitting
Unit
conversion on transport
refrigeration unit
4. Test-run of repaired unit
Total Hours 260

3
Generic Units of Competencies

4
Sector Specific Units of Competencies

5
Occupation Specific Units of Competencies

6
Unit Code and Title OURAC001L4V1: Apply Quality Systems and Procedures

Nominal Hours 20 Hours

This unit covers the knowledge, skills and attitudes required to
apply quality systems and procedures.
It specifically includes the tasks of working within quality system,
Unit Descriptor
applying and monitoring quality system improvement in the
workplace, taking responsibility for quality work, and applying
standard procedures for each job.
Performance Criteria
Elements of
Bold and Underlined terms are elaborated in the Range of
Competency
Variables.
1. Work within quality 1.1. Instructions and procedures are followed and duties are
system performed in accordance with demand of quality
improvement;
1.2. Conformance with specifications is ensured;
1.3. Defects are detected and reported to authority according to
company procedures;
1.4. Customer’s satisfaction is ensured in performing an operation
or quality of product or services;
2. Apply and monitor 2.1. Performance measurement systems are identified;
improvement of 2.2. Performance is assessed at regular interval;
quality system in the 2.3. Specifications and standard operating procedures are
workplace established and identified;
2.4. Defects are detected and reported to the higher authority
according to standard operating procedures;
2.5. Process improvement procedures are applied as per standard
operating procedure (SOP);
2.6. Quality of product is checked and verified according to
manual;
2.7. Performance of operation or quality of product or
service is monitored to ensure customer satisfaction;
3. Take responsibility 3.1. Concept of supplying product or service to meet the
for quality work customer/client requirements is comprehend and applied
accordingly;
3.2. Responsibility is taken for quality work;
4. Apply standard 4.1. Quality control and quality assurance system procedures
procedures for each are followed for each job;
job 4.2. Conformance to specification is ensured in every case at all
situations;
Range of Variables

7
Variable Range (may include but not limited to):
1. Quality improvement A system comprising some or all the following elements:
1.1 Quality inspection
1.2 Quality control
1.3 Quality improvement
1.4 Quality assurance
2. Customer / client 2.1 Appropriateness of product
requirements 2.2 Appearance
2.3 Durability
2.4 Grade or quality design
2.5 Usability of life span
2.6 Conformance to Quality
2.7 Reliability
2.8 Maintainability
3. Quality control and 3.1. Quality control 3.2. Quality Assurance
quality assurance 3.1.1. Product 3.2.1. Process
3.1.2. Reactive 3.2.2. Pro-active
3.1.3. Line function 3.2.3. Staff function
3.1.4. Find the defects 3.2.4. Prevent the defects
3.1.5. Walk through 3.2.5. Quality audit
3.1.6. Testing 3.2.6. Defining process
3.1.7. Inspection 3.2.7. Selection of tools
3.1.8. Checklist review 3.2.8. Training
3.1.9. Reporting to competent 3.2.9. Reporting to
authority competent authority
Evidence Guide
The evidence must be authentic, valid, sufficient, reliable, consistent, and recent and meet the
requirements of the current version of the Unit of Competency.
1. Critical Aspects Assessment required evidence that the candidate:
1.1. Followed instructions and procedures strictly
1.2. Performed duties in accordance with demand of quality
system
1.3. Ensured conformance to specifications
1.4. Detected defects and reported to authority in accordance to
standard operating procedures
1.5. Held responsibility for quality work
1.6. Followed quality control and quality assurance system
procedures for each job
2. Underpinning 2.1. The reasons why good quality should be maintained and poor
knowledge quality should be eliminated

8
 2.2. Meaning of the key terms - quality, quality assurance,
quality control, quality inspection, quality improvement and
total quality control
2.3. Process and procedures for improving and maintaining
quality
2.4. Procedures for addressing defects
2.5. Record keeping within the quality improvement system in
workplace
2.6. Factors, which affect successful implementation of the
quality systems and procedures
3.1. Maintaining best quality
3.2. Eliminating poor quality
3.3. Improving and maintaining quality
3. Underpinning skills 3.4. Addressing defects and procedures
3.5. Maintaining record within the quality improvement system in
workplace
3.6. Implementing quality systems and procedures
4.1. Commitment to occupational health and safety
4.2. Environmental concerns
4. Underpinning
4.3. Eagerness to learn
Attitudes
4.4. Tidiness and timeliness
4.5. Respect for rights of peers and seniors in workplace
The following resources must be provided:
5.1. Adequate workplace (simulated or actual workplace)
5. Resource implications 5.2. Tools and equipment
5.3. Materials are relevant to the relevant to work activity
5.4. Drawing and specifications relevant to the work
Competency should be assessed by
6.1. Demonstration
6. Methods of
6.2. Oral questioning
assessment
6.3. Written test
6.4. Portfolio
7.1. Competency assessment must be done in NSDA accredited
assessment centre
7. Context of assessment
7.2. Assessment should be done by a NSDA certified/nominated
assessor
Accreditation Requirements
Training Providers must be accredited by National Skills Development Authority (NSDA), the
National Quality Assurance Body, or a body with delegated authority for quality assurance to
conduct training and assessment against this unit of competency for credit towards the award of

9
any NTVQF qualification. Accredited providers assessing against this unit of competency must
meet the quality assurance requirements set by NSDA.

10
 OURAC002L4V1: Service and Maintain Precision Air
Unit Code and Title
Conditioning Unit
Nominal Hours 60 Hours
This unit covers the knowledge, skill and attitude required to service
and maintain precision air conditioning unit in the workplace.
It specifically includes the tasks of preparing for maintenance
Unit Descriptor activities, inspecting and adjusting air-conditioning controls,
parameters, and operating conditions and maintaining lubrication
system of precision air conditioner, maintaining refrigeration system
and air distribution system.
Performance Criteria
Elements of
Bold and Underlined terms are elaborated in the Range of
Competency
Variables.
1. Prepare for 1.1 Personal protective equipment (PPE) is used and OSH is
maintenance activities followed;
1.2 Work instructions are read and interpreted to determine job
requirements;
1.3 Service manual(s) from the manufacturer is consulted if
available, nevertheless SOPs are adopted;
1.4 Tools and equipment are selected as required with the job;
1.5 Safety rules are obeyed according to workplace requirement;
2. Inspect and adjust air- 2.1 Evaporator or cooling coil or both are cleaned as prescribed in
conditioning controls, the manufacturer’s service manual;
parameters, and 2.2 Refrigeration piping or tubing is inspected for abnormal
operating conditions conditions based on service procedure;
2.3 Operation or Control Settings are checked accordingly and
adjusted accordingly;
2.4 Accessories are adjusted based upon maintenance or service
manual;
2.5 Procedure of maintenance specified in manufacturer’s
instruction is adopted;
3. Maintain lubrication 3.1 Lubrication system parameters and components used are
system of precision air adjusted as described in manufacturer’s instruction;
conditioner 3.2 Lubrication Parameters are inspected and tuned as per
system procedure;
3.3 Leaks and restrictions are detected and repaired based on
Standard Operating Procedure;
3.4 Used oil is disposed properly according to ASHRAE Code of
practice;

11
4. Maintain Refrigeration 4.1 Operation Parameters are measured and analyzed based on
System standard specifications;
4.2 Pressure and Temperature drops across filter or strainers are
inspected and recorded;
4.3 Leak test is performed as per SOP;
4.4 Refrigeration components, accessories and consumables are
checked for contaminants in accordance manufacturer’s manual
or ASHRAE Code of Practice;
5. Maintain air 5.1 Air distribution system components are checked and air flow
distribution system rates are balanced;
5.2 Air supply systems are checked and maintained to meet
operational and regulatory requirements;
Range of Variables
Variables Range (may include but not limited to):
1.1 Hand gloves.
1.2 Safety Shoes.
1. PPE 1.3 Mask
1.4 Apron
1.5 Helmet
2.1 Pliers
2.2 Screwdriver
2.3 Hacksaw
2.4 Wrenches
2.5 Wire stripper/crimper
2.6 Swaging tools,
2.7 Flaring tools
2. Tools 2.8 Bench Vice
2.9 C Clamp Hammer
2.10 Steel wire brush
2.11 Tube cutter
2.12 Tube bender
2.13 Block vice
2.14 Reamer
2.15 Allen key set
3.1 Gas welding equipment
3.2 Multimeter
3.3 Clamp on meter
3. Equipment 3.4 Leak detector
3.5 Charging station
3.6 Weight scale
3.7 Two stage vacuum pumps

12
 3.8 Dry nitrogen cylinder with two stage regulators
3.9 Digital temperature meter
3.10 Refrigerant charging unit
4.1 Leaks
4.2 Insulation Cracks
4. Abnormal Conditions
4.3 Looseness of supports or brackets
4.4 Knocking
5.1 Pressures
5.2 Temperatures
5.3 Voltages
5. Operation or Control
5.4 Current
Settings
5.5 Air Flow
5.6 Noise Level
5.7 Vibrations
6.1 Ionizer
6.2 Unloader
6. Accessories
6.3 Fan blades/blower
6.4 Motors
7.1 Oil levels
7. Lubrication 7.2 Oil properties
Parameters 7.3 Purity of oil
7.4 Oil Viscosity
8.1 Operating Temperature
8.2 Superheat
8.3 Pressure
8. Operation Parameters 8.4 Voltage
8.5 Current
8.6 Air Velocity
8.7 Sound Level & Vibration
9.1 Expansion Devices
9.2 Evaporator
9.3 Compressor
9. Refrigeration
9.4 Condenser
Components,
9.5 Filter Drier
accessories, and
9.6 Sight Glass
consumables
9.7 Oil
9.8 Refrigerant
9.9 Air filter
10.1 Air Swing
10. Air Distribution
10.2 Ducting System
System
10.3 Air outlet / Grill

13
 10.4 Vane
10.5 Damper
10.6 Louvers
Evidence Guide
The evidence must be authentic, valid, sufficient, reliable, consistent, and recent and meet the
requirements of the current version of the Unit of Competency
Assessment required evidence that the candidate:
1.1 Air-Conditioning accessories, controls and operating
conditions are checked
1. Critical Aspects of 1.2 Applied maintenance procedures according to manufacturer’s
Competency maintenance manual
1.3 Lubrication system of AC is checked and maintained
1.4 Refrigeration system is checked and maintained
1.5 Air distribution system is checked and maintained
2.1 Safety Practices, PPE, and Safety Gear
2.2 Trade mathematics, measurements, unit conversions,
dimension, ration, and proportion
2.3 Tools and materials with proper specification and usage
2.4 Clean air act, Montreal Protocol, Ozone Depleting Potentiality
(ODP) and Global Warming Potentiality (GWP)
2. Underpinning
2.5 Refrigeration Cycle, Components, and accessories for
Knowledge
Precision Air-Conditioners
2.6 Troubleshooting of precision air-conditioners
2.7 Thermostatic Expansion Valve (TXV) and Automatic
Expansion Valve (AXV) Electronic Expansion Valve (EXV)
adjusting procedure
2.8 Humidifier and De-humidifier servicing procedure
3.1. Interpretating of plans and details
3.2. Preparing materials
3.3. Using of electrical and mechanical tools and equipment
3. Underpinning Skills properly
3.4. Troubleshooting techniques
3.5. Calibrating expansion valves
3.6. Adjusting superheat
4.1 Commitment to occupational health and safety
4.2 Promptness in carrying out activities
4.3 Sincere and honest to duties
4.4 Environmental concerns
4. Underpinning Attitudes
4.5 Eagerness to learn
4.6 Tidiness and timeliness
4.7 Respect for rights of peers and seniors in workplace
4.8 Communication with peers and seniors in workplace

14
 The following resources must be provided:
5.1 Workplace (simulated or actual)
5. Resource Implications
5.2 Tools and equipment appropriate for work activities
5.3 Materials for work activities
Methods of assessment may include but not limited to:
6.1 Written Test
6. Methods of Assessment 6.2 Demonstration
6.3 Oral Questioning
6.4 Portfolio
7.1 Competency assessment must be done in NSDA accredited
assessment centre
7. Context of Assessment
7.2 Assessment should be done by a NSDA certified/nominated
assessor
Accreditation Requirements
Training Providers must be accredited by National Skills Development Authority (NSDA), the
National Quality Assurance Body, or a body with delegated authority for quality assurance to
conduct training and assessment against this unit of competency for credit towards the award of
any NTVQF qualification. Accredited providers assessing against this unit of competency must
meet the quality assurance requirements set by NSDA.

15
 OURAC003L4V1: Troubleshoot Precision Type Air
Unit Code and Title
Conditioning Unit
Nominal Hours 40 Hours
This unit covers the knowledge, skill and attitude required to
troubleshooting of Precision Air Conditioning Unit in the
workplace.
Unit Descriptor It specifically includes tasks of planning and preparing for
troubleshoot, identifying and repairing faults or problems,
performing refrigerant recovery/recycling and retrofitting, and
observing performance of repaired or troubleshoot unit
Performance Criteria
Elements of Competency Bold and Underlined terms are elaborated in the Range of
Variables.
1. Plan and prepare for 1.1 Personal protective equipment (PPE) is used and OSH is
troubleshooting followed;
1.2 Work instructions are read and interpreted to determine job
requirements;
1.3 Appropriate materials, tools and equipment are selected
based on job requirements;
1.4 Safety rules are obeyed according to workplace
requirement;
2. Identify and repair fault or 2.1 Refrigeration system components are tested following
problems manufacturer’s manual, ASHARE code of practice and/or
enterprise troubleshooting policy;
2.2 Faults/Problems with refrigerant system are diagnosed;
2.3 Practiced ASHARE code and troubleshooting procedure;
2.4 Remedial action is taken to rectify faults/problems in line
with manufacturer’s manual;
2.5 Testing procedure, faults, corrections as per industry/client
requirement and as reported;
3. Perform refrigerant 3.1 Suitable tools and equipment are selected and used based
recovery/recycling and on job requirement;
retrofitting 3.2 Refrigerant recovery is performed as per clean air act and
manufacturer’s recommendations;
3.3 Retrofitting is performed it necessary;
4. Observe performance of 4.1 Air-Conditioning unit is tested as per industry requirement;
repaired or troubleshoot 4.2 Report on testing air-conditioning unit is performed in a
unit prescribed manner defined by manufacturer;
Range of Variables
Variables Range (may include but not limited to):

16
 1.1 Expansion Devices
1.2 Evaporator
1.3 Compressor
1. Refrigeration System 1.4 Condenser
Components 1.5 Filter Drier
1.6 Sight Glass
1.7 Oil
1.8 Refrigerant
2.1 Leakage
2.2 Contamination
2.3 Fractionation
2. Faults/problems
2.4 Restriction
2.5 Condensing and evaporating temperature
2.6 System pressure
3.1 Equipment operator’s manual
3. Manufacturer’s
3.2 Equipment service manual
Recommendation
3.3 Name plate data
Evidence Guide
The evidence must be authentic, valid, sufficient, reliable, consistent, and recent and meet the
requirements of the current version of the Unit of Competency
Assessment required evidence that the candidate:
1.1 Appropriate wiring diagrams, charts and manuals are
interpreted
1. Critical Aspects of 1.2 Checked power supply in compliance with nameplate rating
Competency or manufacturer’s standard
1.3 Troubleshoot faults that are diagnosed
1.4 Performed refrigerant recovery, recycling or retrofitting as
necessary
2.1 Tools and materials with proper specification and usage
2.2 Clean air act, Montreal Protocol, ODP and GWP
2.3 Refrigeration Cycle, Components, and accessories for
Precision Air-Conditioners
2. Underpinning Knowledge
2.4 Troubleshooting of precision air-conditioners
2.5 TXV and AXV adjusting procedure
2.6 Proper handling of refrigerants
2.7 Interlocking sequence of control
3.1. Interpreting of plans and details
3.2. Preparing materials
3.3. Using of electrical and mechanical tools and equipment
3. Underpinning Skills
properly
3.4. Performing electrical test and repair works
3.5. Performing mechanical test and repair works

17
 5.1 Commitment to occupational health and safety
5.2 Promptness in carrying out activities
5.3 Sincere and honest to duties
5.4 Environmental concerns
4. Underpinning Attitudes
5.5 Eagerness to learn
5.6 Tidiness and timeliness
5.7 Respect for rights of peers and seniors in workplace
5.8 Communication with peers and seniors in workplace
The following resources must be provided:
5.1 Workplace (simulated or actual)
5. Resource Implications
5.2 Tools and equipment appropriate for work activities
5.3 Materials for work activities
Methods of assessment may include but not limited to:
6.1 Written Test
6. Methods of Assessment 6.2 Demonstration
6.3 Oral Questioning
6.4 Portfolio
7.1 Competency assessment must be done in NSDA
accredited assessment centre
7. Context of Assessment
7.2 Assessment should be done by a NSDA
certified/nominated assessor
Accreditation Requirements
Training Providers must be accredited by National Skills Development Authority (NSDA), the
National Quality Assurance Body, or a body with delegated authority for quality assurance to
conduct training and assessment against this unit of competency for credit towards the award of
any NTVQF qualification. Accredited providers assessing against this unit of competency must
meet the quality assurance requirements set by NSDA.

18
 OURAC004L4V1: Repair and Install Prefabricated Cold
Unit Code and Title
Room and Freezer Rooms

Nominal Hours 60 Hours

This unit covers the knowledge, skill and attitude require to repair
and install prefabricated cold room and freezer room in the
Unit Descriptor workplace.
It specifically includes the tasks of identifying the selected design,
installing, repairing, and maintaining of cold room and freezer room.
Performance Criteria
Elements of Competency Bold and Underlined terms are elaborated in the Range of
Variables.
1. Identify the selected 1.1. Client’s requirements are identified, noted and location of
design of cold room installation is inspected;
and freezer room 1.2. Specifications of selected system is checked to ensure
matching with selected design of the unit;
1.3. Service manuals are identified as per job requirement;
1.4. Service information is identified as per job requirement;
1.5. Necessary Tools, equipment, and material are selected
required for the work;
2. Install cold room and 2.1. Appropriate PPE is selected and used in line with job
freezer room requirements;
2.2. Components of refrigeration the system are selected
according to requirements for the installation;
2.3. Floor is prepared and leveled to install cold room/ freezer
room according to lay out plans;
2.4. Cold room / freezer room is installed according to following
manufacturers specification;
2.5. Refrigeration equipment including piping & electrical items
are installed according to specification;
2.6. System is checked and tested before commissioning, as per
specifications and manufacturer’s instructions;
2.7. Commissioning data indicating system pressures, electrical
data, humidity & temperatures of outside and inside cold
room, are recorded and filed for future use;
3. Prepare to repair cold 3.1 Cold room and freezer room checked and extent of repair / or
room and freezer maintenance ascertained and recorded;
room 3.2 Equipment, material, and accessories are selected as required
for the job;
3.3 All components of the electrical / electronic circuits checked
according to standard practice and manufacturers
specifications;

19
 3.4 All electro-mechanical safety cut outs checked and
performance ensured according to manufacturer’s
specifications;
3.5 All components of the refrigeration circuit are checked and
defects are identified for repairing according to
manufacturer’s specifications;
3.6 Body mounts checked and restored to the required condition;
3.7 System pressure and gas leaks are tested using specified test
instrument;
4. Maintain and repair cold 4.1 System evacuated using vacuum pump and gas recharged by
room and freezer room weight using specified equipment according to
specifications;
4.2 Door heaters, door gaskets and thermostat are serviced / or
repaired where necessary to ensure proper functioning;
4.3 Interior cooler space is checked and cleaned to ensure dust /
debris free;
4.4 In case of ice plants, water source is checked and serviced
according to specifications;
4.5 Plant is operated, checked, and tested to ensure satisfactory
performance according to manufacturer’s specifications;
4.6 Recorded readings / data is obtained during operation of the
plant and checked against manufacturers specifications;
Range of Variables
Variables Range (may include but not limited to):
1.1 Service manual/schematic diagram/parts list
1. Service manuals
1.2 Operating instructions/User’s/Owner’s manual
2.1 Job Report Sheets
2.2 Customer index
2.3 Service flowchart
2. Service Information
2.4 Stock and inventory record
2.5 Requisition slips (for acquisition of parts)
2.6 Supplier Index
3.1 Electrical controls
3.2 Fan motors Refrigerant circuit Evaporator Condenser
3. Components of
3.3 Metering device (refrigerant flow controller), filter / drier, pipe
refrigeration
and fittings, moisture indicators and other accessories.
3.4 Auger unit
4.1 Insulation resistance
4.2 Gas Welding
4. Test & Check 4.3 Continuity
4.4 Timing Sequence
4.5 Leak

20
 4.6 Motor Terminal
4.7 Current drawn while running
4.8 Current drawn on starting
4.9 Temperature Test
4.10 Brine test
Evidence Guide
The evidence must be authentic, valid, sufficient, reliable, consistent, and recent and meet the
requirements of the current version of the Unit of Competency.

Assessment required evidence that the candidate:

1.1 Applied safety rules and procedures
1.2 Identified the selected design of cold room /freezer room for
installation
1. Critical aspects of
1.3 Prepared and leveled the location to install
competency
1.4 Installed cold room/ freezer room with different fittings
1.5 Checked and prepared to maintain / repair cold room / freezer
room
1.6 Operated the plant and checked for satisfactory performance
2.1. Refrigeration cycle
2.2. Single and 3 phase electrical power supply system
2.3. Fault finding procedures
2. Underpinning 2.4. Type of refrigerants and their applications
knowledge 2.5. Procedure of testing performances
2.6. Testing procedures & adjustments in central air conditioning
systems
2.7. Method of de-frosting
3.1 Interpretation of manufacturer’s manuals and specifications
3.2 Selection of refrigerants according to the type of system
3.3 Charging refrigerants using specified equipment
3.4 Cutting, bending & joining refrigerant lines using correct
tools
3.5 Swaging and flaring of tubes
3. Underpinning skills 3.6 Welding & brazing
3.7 Preparing and leveling the location for installing
3.8 Installing cold room/ freezer room with different fittings
3.9 Pressure testing and evacuating & charging of refrigeration
systems
3.10 Detection and repair of gas leaks
3.11 Checking and repairing de-frosting system

21
 4.1 Commitment to occupational safety and health
4.2 Environmental concerns
4. Underpinning
4.3 Eagerness to learn
attitudes
4.4 Tidiness and timeliness
4.5 Respect for rights of peers and seniors in workplace
The following resources must be provided
5.1 Standard workplaces
5.1 Tools required as per job requirements
5. Resource implications
5.2 Operating Manuals, Codes, Standards, and reference
materials
5.3 Materials to perform work activities
Competency should be assessed by
6.1 Written Test
6. Methods of
6.2 Demonstration
assessment
6.3 Oral Questioning
6.4 Portfolio
7.1 Competency assessment must be done in NSDA accredited
assessment centre
7. Context of assessment
7.2 Assessment should be done by a NSDA
certified/nominated assessor
Accreditation Requirements
Training Providers must be accredited by National Skills Development Authority (NSDA), the
National Quality Assurance Body, or a body with delegated authority for quality assurance to
conduct training and assessment against this unit of competency for credit towards the award of
any NTVQF qualification. Accredited providers assessing against this unit of competency must
meet the quality assurance requirements set by NSDA.

22
 OURAC005L4V1: Check and Inspect Variable Refrigerant
Unit Code and Title Flow (VRF) / Variable Refrigerant Volume
(VRV) System
Nominal Hours 20 Hours
This unit covers the knowledge, skills and attitudes required to
check and inspect Variable Refrigerant Flow (VRF) or Variable
Refrigerant Volume (VRV) air-conditioning system in the
workplace.
Unit Descriptor
It specifically includes the tasks of prepare to test and inspect
VRF/VRV air-conditioning system, check VRF/VRV air-
conditioning system, complete and report checking and inspection
activities.
Performance Criteria
Elements of
Bold and Underlined terms are elaborated in the Range of
Competency
Variables.
1. Prepare to test and 1.1 Work health and safety (WHS)/OHS procedures are obtained
inspect VRF/VRV air- and implemented in accordance with workplace procedures;
conditioning system 1.2 WHS/OHS risk control measures and procedures for work are
followed;
1.3 Safety hazards not previously identified are documented and
risk control measures implemented;
1.4 System operating parameters are identified by reviewing
system specifications and component technical data;
2. Check and Inspect 2.1 Testing/measuring devices are connected and set up in
VRF/VRV air- accordance with requirements for a particular system;
conditioning system 2.2 Measurements and adjustments are made to equipment
components and controls to provide optimum system
performance in accordance with system specifications and
regulatory requirements;
2.3 Unplanned situations are responded to in accordance with
workplace procedures in a manner that minimizes risk to
personnel and equipment;
2.4 Checking and Inspection is carried out efficiently without
waste of materials or damage to apparatus, the surrounding
environment or services applying sustainable energy principles;
3. Complete and report 3.5 Worksite is cleaned and made safe in accordance with
Checking and workplace procedures;
Inspection activities 3.6 Adjustment settings and results of commissioning work are
documented and appropriate person/s are notified in accordance
with workplace procedures;

23
Range of Variables
Variables Range (may include but not limited to):
1.1 Digital Thermometer with probe
1.2 Pressure Gauge or Gauge Manifold
1.3 Refrigerant Analyzer
1. Testing/measuring
1.4 Multimeter (Volt, Amps, Capacitance, Inductance)
devices
1.5 Anemometer
1.6 Hygrometer
1.7 Psychrometer
2.1 Phase Sequence
2.2 Incoming Voltages (Outdoor)
2.3 Incoming Voltages (Indoor)
2.4 System Addresses (Short Circuit Pin)
2.5 Indoor Fan Speed
2.6 Indoor Air and Coil Temperature
2. Checking and
2.7 Outdoor Fan Speed
Inspection
2.8 Outdoor Coil Temperature
2.9 Temperature at Compressor inlet and outlet
2.10 Compressor Temperature
2.11 Refrigerant Pressure at suction and discharge
2.12 Air-Leakage at Conditioned Space
2.13 Refrigerant Leakage
Evidence Guide
The evidence must be authentic, valid, sufficient, reliable, consistent, and recent and meet the
requirements of the current version of the Unit of Competency
Assessment required evidence that the candidate:
1.1 Prepared for inspection activities
1.2 Checked and inspected Air-Conditioning accessories, controls,
and operating conditions
1. Critical Aspects of 1.3 Checked and inspected Refrigeration system as per industry
Competency requirement
1.4 checked inspected Air distribution system as manufacturer’s
guideline
1.5 Made interactive communication where applicable to ensure
safe and effective work operations
2.1 OSH regulations and Safety Practices
2.2 Refrigeration & Air-Conditioning Principles
2. Underpinning 2.3 VRF/VRV along with Multiple Evaporation unit basics
Knowledge 2.4 Operation of Multimeter, Pressure Gauges, Anemometer
2.5 Circuit and Circuit Symbols
2.6 Cable addressing

24
 3.1. Interpreting plans and details
3.2. Preparing for work
3.3. Using of electrical and mechanical tools and equipment
3. Underpinning Skills properly
3.4. Checking and inspecting of VRF/VRV
3.5. Calibrating measuring devices
3.6. Documenting and reporting of checking and inspection results
12.1 Commitment to occupational health and safety
12.2 Promptness in carrying out activities
12.3 Sincere and honest to duties
4. Underpinning 12.4 Environmental concerns
Attitudes 12.5 Eagerness to learn
12.6 Tidiness and timeliness
12.7 Respect for rights of peers and seniors in workplace
12.8 Communication with peers and seniors in workplace
The following resources must be provided:
5.1 Workplace (simulated or actual)
5. Resource Implications
5.2 Tools and equipment appropriate for work activities
5.3 Materials for work activities
Competency should be assessed by
6.1 Demonstration
6. Methods of
6.2 Oral questioning
Assessment
6.3 Written test
6.4 Portfolio
7.1 Competency assessment must be done in NSDA accredited
assessment centre
7. Context of Assessment
7.2 Assessment should be done by a NSDA certified/ nominated
assessor
Accreditation Requirements
Training Providers must be accredited by National Skills Development Authority (NSDA), the
National Quality Assurance Body, or a body with delegated authority for quality assurance to
conduct training and assessment against this unit of competency for credit towards the award of
any NTVQF qualification. Accredited providers assessing against this unit of competency must
meet the quality assurance requirements set by NSDA.

25
 OURAC006L4V1: Prepare Estimate for Repair, Installations
Unit Code and Title and Maintenance of Refrigeration and Air
Conditioning Systems

Nominal Hours 20 Hours

This unit covers the knowledge, skill and attitude required to

prepare estimate for repair, installations and maintenance of
refrigeration and Air conditioning systems in the workplace.
Unit Descriptor It specifically includes the tasks of preparing estimate for repair
and maintenance work, installation of air conditioning systems
install, new installation of Refrigeration systems and relocation of
refrigeration and air conditioning systems.
Performance Criteria
Elements of Competency Bold and Underlined terms are elaborated in the Range of
Variables.

1. Prepare estimate for 1.1. Required Tools, equipment and material and estimated
repair & maintenance man hours for job is prepared for the estimate;
works 1.2. Replacement parts and components for repair/ maintenance
of system are listed out;
1.3. Cost of materials, parts, and components to be replaced and
consumed is estimated based on market price;
1.4. Cost of man hour is worked out in accordance with job
requirement;
1.5. Cost of transport of service personnel is worked out;
1.6. Overall overhead costs and taxes are estimated;
1.7. Finance cost is estimated;
1.8. Preparation of Estimate including a profit margin is worked
out;
2.1. Power requirement of air conditioner unit, availability and
2. Prepare estimate for
adequacy of supply power is checked;
installation of air
2.2. Measurements of space to be air conditioned and its volume
conditioning systems
is calculated and noted down;
2.3. Cost of man hour necessary to install and cost of transport for
service personnel, material, parts, and components are
worked out based on work requirement;
2.4. Overall overhead costs including taxes and man hour costs to
be worked out, along with financial cost;
2.5. Total estimate for installation of air conditioning system to be
worked out;

26
 3. Prepare estimate for 3.1 Power requirement of refrigeration unit, and availability and
new installation of adequacy of power supply to be checked;
Refrigeration systems 3.2 Correct type of refrigeration system/or unit are selected to suit
customer’s requirements;
3.3 Cost of man hour necessary to install refrigeration equipment
is worked out;
3.4 Cost of transport, material, parts & components are worked
based on work requirement;
3.5 Overhead costs including taxes is worked out along with
financial cost;
3.6 Total estimate for installation of refrigeration system / unit
including a profit margin are worked out;
4. Prepare an estimate of 4.1 System / Unit is checked and its new location is identified;
relocation of 4.2 Power requirement of refrigeration unit / Air conditioner, and
Refrigeration and Air availability and adequacy of supply power are checked as per
Conditioning Systems capacity of the units;
4.3 Refrigerant tubing, other parts & components necessary for
relocation of system / or unit are listed out and estimated in
accordance with market price;
4.4 Cost of blanking of existing location, recovery of gas pumped
out Is estimated;
4.5 Cost of labor, transport and materials is worked out as per
work requirement;
4.6 Total estimate including a profit margin is worked out;
4.7 Estimate is submitted to relevant authority / or client and
approval obtained;

Range of Variables

Variables Range (may include but not limited to):

1.1 Pliers
1.2 C Clamp
1.3 Screwdriver
1.4 Hammer
1.5 Hacksaw
1.6 Steel wire brush
1. Tools
1.7 Wrenches
1.8 Tube cutter
1.9 Wire stripper
1.10 Crimper
1.11 Tube bender
1.12 Swaging tools,

27
 1.13 Flaring tools
1.14 Block vice
1.15 Bench Vice
1.16 Reamer
1.17 Allen key set
1.18 Rotary hammer drill
2.1 Testing & measuring
2.2 Magger
2.3 Charging station
2.4 Personal safety equipment
2.5 Weighing scale
2.6 Gas welding equipment
2. Equipment
2.7 Measuring equipment Multimeter
2.8 Two stage vacuum Pump
2.9 Clamp on ammeter
2.10 Psychrometer/ Hygrometer Leak detector
2.11 Digital temperature meter
2.12 Dry nitrogen cylinder with two stage regulators
3.1 Expansion bolt
3.2 Masonry materials (e.g.
3.3 Drill bits cement, sand, etc.)
3.4 Welding rod
3.5 Refrigerants and dry
3.6 Electrical cable nitrogen
3.7 Rawal plugs
3.8 Support structure
3.9 Circuit breaker/switch materials
3. Materials 3.10 Plastic tubing/clamp
3.11 Insulation materials
3.12 Filler rod
3.13 Copper tube
3.14 Welding flux
3.15 VC pipe/clamp
3.16 Filter drier/Strainer
3.17 Lubricating oil
3.18 Copper and brass fittings
3.19 Capillary tube

28
 4.1 Referring to records on details of equipment, items & material
and the
4.2 estimated number of man hours needed for the job
4.3 Referring to layout plans & manufacturer’s specifications
4. Preparation of /instructions
Estimate 4.4 Current market prices of Refrigeration/or Air Conditioning
systems/or Units Costing of material required for installation /
repair / servicing/transport cost / financial cost / overhead cost
4.5 Cost of man / taxes / contingencies/overhead / transport / profit
margin
5.1 Window type air conditioners
5.2 Split type air conditioners
5. System/Units 5.3 Packaged type Air Conditioners
5.4 Domestic Refrigerators / Freezers
5.5 Commercial Refrigerators / Freezers & Coolers
Evidence Guide
The evidence must be authentic, valid, sufficient, reliable, consistent, and recent and meet the
requirements of the current version of the Unit of Competency.

Assessment required evidence that the candidate:

1.1 listed out replacement parts and components
1.2 Estimated cost of man hour, transport of service personnel,
material, parts & components overhead, taxes and profit
margin
1. Critical aspects of
1.3 Prepared estimate for new installation of air conditioning
competency
systems
1.4 Prepared estimate for new installation of Refrigeration
systems
1.5 Prepared an estimate of relocation of Refrigeration / or Air
Conditioning Systems
2.1. Market prices of refrigeration/air conditioning units spares &
material
2. Underpinning
2.2. Relevant elements of costing
knowledge
2.3. Direct and indirect cost
2.4. Identification of electronic components and their applications
3.1. Interpreting manufacturer’s manuals, drawings, sketches
pertaining to installation/repair/servicing of refrigerators and
air conditioners
3.2. Calculating areas & volumes
3. Underpinning skills
3.3. Using techniques to estimate supplies and fittings
3.4. Preparing estimate man hour cost
3.5. Preparing estimate for transport cost
3.6. Preparing an estimate consumable material

29
 3.7. Estimating total cost with profit margin
4.1 Commitment to occupational safety and health
4.2 Environmental concerns
4. Underpinning
4.3 Eagerness to learn
attitudes
4.4 Tidiness and timeliness
4.5 Respect for rights of peers and seniors in workplace
The following resources must be provided
5.1 Standard workplaces
5.2 Tools required as per job requirements
5. Resource implications
5.3 Operating Manuals, Codes, Standards, and reference
materials
5.4 Materials to perform work activities
Competency should be assessed by
6.1 Demonstration
6. Methods of
6.2 Oral questioning
assessment
6.3 Written test
6.4 Portfolio
7.1 Competency assessment must be done in NSDA accredited
assessment centre
7. Context of assessment
7.2 Assessment should be done by a NSDA certified/nominated
assessor
Accreditation Requirements
Training Providers must be accredited by National Skills Development Authority (NSDA), the
National Quality Assurance Body, or a body with delegated authority for quality assurance to
conduct training and assessment against this unit of competency for credit towards the award of
any NTVQF qualification. Accredited providers assessing against this unit of competency must
meet the quality assurance requirements set by NSDA.

30
Unit Code and Title OURAC007L4V1: Troubleshoot Transport Refrigeration Unit

Nominal Hours 40 Hours

This unit covers the knowledge, skills and attitudes required to
Troubleshoot Transport Refrigeration Unit.
It specifically includes the tasks of preparing for maintenance
Unit Descriptor
activities, identifying and repairing faults/ troubles, performing
refrigerant recovery, recycling, and retrofitting conversion on transport
refrigeration unit and testing and running repaired unit.

Elements of Performance Criteria

Competency Bold and Underlined terms are elaborated in the Range of Variables.

1. Prepare for 1.1 Appropriate wiring diagrams, chart and manual are interpreted in
maintenance line with the job requirements;
activities 1.2 Appropriate materials, tools and equipment are selected based on
job requirements;
1.3 Works’ safety is observed according to established operating
standards;
2. Identify and repair 2.1 Components are tested following man following manufacturer’s
faults/ troubles manual or ASHARE Code of practice;
2.2 Faults/problems with components are diagnosed in line with
manufacturer’s manual or ASHARE Code of practice;
2.3 Remedial action is taken to overcome faults/problems in line
manufacturer’s manual;
2.4 Work is completed safely in line with workplace safety guidelines
2.5 Report on testing procedure, faults identified and correction
process adopted;
3. Perform refrigerant 3.1 Suitable tools and equipment are selected and used based on job
recovery, recycling requirement;
and retrofitting 3.2 Refrigerant’s recovery/recycling is performed according to
conversion on manufacturer’s recommendations and ASHARE Code of
transport Practice;
refrigeration unit 3.3 Retrofitting is performed based on ASHARE Code of practice;
3.4 Conversion is performed based on industry standard;
4. Test-run of repaired 4.1 Electrical and mechanical components of repaired unit are
unit checked prior to test run;
4.2 Operating parameters are checked and monitored in line with
manufacturer’s testing procedures;
4.3 Repair and testing procedure is reported to concern authority;
Range of Variables

31
Variables Range (may include but not limited to):
1.1 Hydrochlorofluorocarbon (HCFC)
1. Refrigerants 1.2 Hydrofluorocarbon (HFC)
1.3 Hydrocarbon (HC)
Evidence Guide
The evidence must be authentic, valid, sufficient, reliable, consistent, and recent and meet the
requirements of the current version of the Unit of Competency
Assessment required evidence that the candidate:
1.1 Planned and prepared for troubleshooting and repair
1. Critical Aspects of 1.2 Identified and repaired faults/troubles
Competency 1.3 Refrigerant recovery/recycling and retrofitting/conversion on
transport refrigeration.
1.4 Repaired unit is run and tested.
2.1 Troubleshooting and repair techniques
2.2 Functions and testing procedures of refrigeration plants
2.3 Processes in fault findings
2.4 Understanding service manuals
2.5 Identification of refrigerants
2. Underpinning
2.6 Characteristics of refrigerants
Knowledge
2.7 Recovery machine and operation method
2.8 Evacuation procedures
2.9 Pressure and leak testing procedure
2.10 Retrofitting, charging procedures
2.11 Alternative refrigerants
3.1 Interpreting schematic diagram, preparing materials
3.2 Using appropriate testing instrument, selection of components
and replacement
3.3 Applying troubleshooting and repair techniques
3.4 Preparing service report and documents
3. Underpinning Skills 3.5 Following procedures in identifying refrigerants
3.6 Performing leak test procedures
3.7 Performing recover/recycling or refrigerants
3.8 Performing evacuation process
3.9 Applying testing procedure
3.10 Performing retrofitting or conversion procedures
4.1 Commitment to occupational health and safety
4.2 Promptness in carrying out activities
4.3 Sincere and honest to duties
4. Underpinning
4.4 Environmental concerns
Attitudes
4.5 Eagerness to learn
4.6 Tidiness and timeliness
4.7 Respect for rights of peers and seniors in workplace

32
 4.8 Communication with peers and seniors in workplace
The following resources must be provided:
5.1 Work place location
5. Resource 5.2 Tools and equipment appropriate to maintaining transport
Implications refrigeration system
5.3 Materials relevant to the activity
5.4 Drawings and specifications relevant to the task
Methods of assessment may include but not limited to:
Written Test
6.1
6. Methods of
Demonstration
6.2
Assessment
Oral Questioning
6.3
Portfolio
6.4
Competency assessment must be done in NSDA accredited
7.1
7. Context of assessment centre
Assessment 7.2 Assessment should be done by a NSDA certified/nominated
assessor
Accreditation Requirements
Training Providers must be accredited by National Skills Development Authority (NSDA), the
National Quality Assurance Body, or a body with delegated authority for quality assurance to
conduct training and assessment against this unit of competency for credit towards the award of
any NTVQF qualification. Accredited providers assessing against this unit of competency must
meet the quality assurance requirements set by NSDA.

33
Development of Competency Standard by Technical Sub-Committee (TSC)
The Competency Standards for National Skills Certificate in "Refrigeration and
Airconditioning" NSQF L- 4 Qualification is Developed by TSC and approved by NSDA.

Respectable members:

Refrigeration and Airconditioning

1.

2.

3.

4.

5.

6.
7.
8.
9.
10.
11.
Md. Amir Hossain, Process Expert (CS and Curriculum), NSDA. Member
12.
Cell: 01631670445, Email: razib.consultant@yahoo.com
Md. Quamruzzaman, Director (Skills Standard), NSDA, Member
13.
Cell: 01819189320 Email: qzaman40@yahoo.com
Engr. B.M. Shariful Islam, Deputy Director (Skill Standard), Member
14.
Cell: +880 01715010321, Email: sharif9375@gmail.com

34
Validation of Competency Standard by Standard and Curriculum
Validation Committee (SCVC)
The Competency Standards for National Skills Certificate in "Refrigeration and
Airconditioning" is validated by SCVC on 01-02 June 2021 and approved by NSDA.

Respectable members of the SCVC:

Re-Review of Competency Standard

The Competency Standards for National Skills Certificate in Refrigeration and Air
Conditioning" Level-4 is Re-Reviewed by NSDA on November, 2023.

35