Course Overview
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This 2-day course introduces participants to the inner workings of:
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HVAC systems
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Refrigeration cycles
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Compression systems
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Air-conditioning troubleshooting
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Corrective maintenance practices
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The training is designed to help maintenance personnel understand:
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How air-conditioning systems function
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How HVAC systems behave during operation
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Why air-conditioning systems break down
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How to identify problems and apply corrective measures
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In Malaysia, air-conditioning and central cooling systems are widely used to maintain workplace comfort and productivity, making proper maintenance essential for business operations.
Benefits After Attending the Training
Participants will Able to:
Understand the basic principles of HVAC and air-conditioning systems
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Identify the 5 main HVAC system loops:
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Airside loop
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Chilled water loop
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Refrigeration loop
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Heat rejection loop
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Control loop
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Differentiate between:
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Direct Expansion systems
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Chilled-water systems
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Understand the vapor-compression refrigeration cycle
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Learn how refrigerant heat, pressure, and temperature change inside a refrigeration system
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Recognise common compressor types used in air-conditioning systems
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Understand the functions of key refrigeration system components
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Apply a systematic approach to troubleshooting air-conditioning problems
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Use subcooling and superheat as troubleshooting tools
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Identify common system issues such as:
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Low load
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Low charge
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Overcharge
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High load
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Restricted metering
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Restricted liquid line
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Restricted drier
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Restricted condenser
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Understand proper maintenance practices for water-cooled chillers and ancillary equipment
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Improve system efficiency, reliability, and equipment operating life
Who Should Attend
This training is suitable for:
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Maintenance Technicians
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Facility Maintenance Personnel
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Building Maintenance Teams
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M&E Technicians
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HVAC Service Personnel
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Plant Maintenance Personnel
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Chargemen
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Technical Support Staff
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Maintenance Supervisors
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Operations personnel involved in building cooling systems
Personnel responsible for air-conditioning system operation, inspection, or troubleshooting
Course Module
Module 1: Introduction to HVAC Systems
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Comfort requirements
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The five HVAC system loops
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Direct Expansion versus chilled-water systems
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Common HVAC system types
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Factors affecting HVAC system selection
Module 2: Refrigeration Cycle
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Heat and refrigeration
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Refrigerants
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Refrigeration cycle
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Pressure-enthalpy chart
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PH diagrams and scales
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Refrigerant blends
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Thermodynamic tables
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Refrigeration effect
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Refrigeration system capacity
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Compressor capacity
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Refrigerant coefficient of performance
Module 3: Refrigeration Compressor
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Vapor-compression refrigeration
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Overview of compressor types
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Rotary compressors
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Reciprocating compressors
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Scroll compressors
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Screw compressors
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Centrifugal compressors
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Compressor capacity control
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Compressor operation in DX and chilled-water systems
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Hot gas bypass
Module 4: Refrigeration System Components
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Condensers
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Air-cooled condensers
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Evaporative condensers
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Water-cooled condensers
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Evaporators
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Expansion devices
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Solenoid valve
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Liquid-line filter drier
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Moisture-indicating sight glass
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Suction line filter
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Hot gas muffler
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Shutoff valve and access port
Module 5: Troubleshooting an Air Conditioning System
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Systematic troubleshooting method
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Typical installation problems
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Operation log for air-cooled systems
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Understanding subcooling
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Understanding superheat
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Troubleshooting exercises on common system issues:
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Low load
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Low charge
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Overcharge
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High load
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Restricted metering
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Restricted liquid line
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Restricted drier
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Restricted condenser
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Module 6: Water-Cooled Chiller & Ancillary Equipment Maintenance
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Overview of chilled water systems
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AHU maintenance
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Chilled water and condenser water circulation
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Water pump maintenance
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Chiller operating principles
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Chiller maintenance considerations
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Cooling tower maintenance
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Water treatment
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Air-conditioning system energy consumption
Trainer's Profile
Years of Experience
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More than 30 years of hands-on experience in servicing air-conditioning equipment
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Strong exposure to large-tonnage water chillers
Industry Background
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Professional background in refrigeration and air-conditioning
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Factory-trained service engineer
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Former senior technical and service leader in the HVAC industry
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Currently active as an HVAC consultant
Key Projects Handled
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Commissioned chillers in Malaysia and other Asian countries
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Provided technical support for air-conditioning equipment servicing
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Delivered servicing guidance and training for HVAC service teams
Areas of Expertise
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HVAC systems
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Refrigeration and air-conditioning
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Large-tonnage water chillers
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Chiller commissioning
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Air-conditioning troubleshooting
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Service technical support
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Aftermarket services
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Chiller maintenance
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Technical training
Certifications or Professional Memberships
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Studied Refrigeration and Air Conditioning at Ungku Omar Polytechnic Ipoh
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Factory-trained service engineer
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Member of a global service council for centrifugal chiller and helical rotary screw chiller factories in the United States
Past Training Experience
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Conducted technical support and training on air-conditioning equipment servicing
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Training experience covers Malaysia and other Asian countries
