Certificate in HVAC Electrical & Control Systems

The Certificate in HVAC Electrical & Control Systems is designed to provide learners with practical knowledge and technical skills required to understand, install, inspect, test, troubleshoot, service, and maintain electrical and control systems used in heating, ventilation, air-conditioning, and refrigeration equipment.

The program introduces essential electrical principles and their application to HVAC systems, including voltage, current, resistance, power, electrical circuits, single-phase and three-phase systems, motors, compressors, contactors, relays, capacitors, overload protection, circuit breakers, fuses, transformers, thermostats, sensors, actuators, and control boards. Learners will develop the ability to understand HVAC electrical diagrams, identify components, carry out basic electrical measurements, and diagnose common electrical faults.

The course also covers conventional and electronic control systems, temperature and pressure controls, motor speed control, variable frequency drives, fan and pump controls, compressor protection, defrost controls, timers, sequencing, Building Management System integration, and basic automation concepts. Emphasis is placed on systematic troubleshooting, safe electrical isolation, testing procedures, control logic, energy-efficient operation, and professional maintenance practices.

Skills Covered

• Fundamentals of electrical systems for HVAC

• Electrical units and basic calculations

• Voltage, current, resistance, and power

• Ohm's law and electrical relationships

• AC and DC electrical concepts

• Single-phase electrical systems

• Three-phase electrical systems

• Series and parallel circuits

• Electrical circuit protection

• Fuses and circuit breakers

• Isolators and disconnect switches

• Earthing and grounding principles

• Electrical wiring and connections

• HVAC electrical symbols

• Reading wiring diagrams and schematics

• Electrical control diagrams

• Compressor electrical systems

• Fan and blower electrical systems

• Pump electrical systems

• HVAC motors and motor types

• Capacitors and starting components

• Contactors and relays

• Overload protection devices

• Thermal protection

• Transformers and control voltage

• Terminal blocks and control wiring

• Thermostats and temperature controllers

• Pressure switches and pressure controls

• Temperature sensors

• Humidity sensors

• Flow switches and differential-pressure switches

• Electronic control boards

• Microprocessor-based HVAC controls

• Timers and sequencing controls

• Solenoid valves and electrically operated valves

• Actuators and damper controls

• Reversing valve controls

• Defrost control systems

• Compressor safety controls

• Fan-speed control

• Variable frequency drives

• Soft starters and motor-control concepts

• HVAC automation fundamentals

• Building Management System integration

• Control sensors and feedback systems

• Setpoints and control parameters

• HVAC control sequences

• Electrical testing instruments

• Multimeter operation

• Clamp meter operation

• Insulation resistance testing awareness

• Continuity and resistance testing

• Voltage and current measurement

• Motor winding checks

• Capacitor testing

• Contactor and relay testing

• Control-circuit testing

• Fault finding and troubleshooting

• Short-circuit and open-circuit fault identification

• Overload and overcurrent fault diagnosis

• Motor and compressor electrical fault diagnosis

• Sensor and thermostat troubleshooting

• Control-board fault awareness

• Communication and control-system fault awareness

• Preventive electrical maintenance

• Electrical inspection and connection tightening

• Panel cleaning and condition checks

• Maintenance documentation and reporting

• Electrical safety and equipment isolation

• Lockout/tagout principles

• Safe test-probe and measurement practices

• Arc-flash awareness

• Personal protective equipment

• Fire and electrical emergency awareness

• Energy-efficient motor and control operation

• Site housekeeping and professional maintenance practices

Why Join This Program?

• Develop practical knowledge of electrical and control systems used in HVAC equipment.

• Understand essential electrical principles and how they apply to HVAC applications.

• Learn to identify motors, compressors, contactors, relays, capacitors, sensors, controls, and protection devices.

• Develop skills in reading HVAC wiring diagrams and electrical schematics.

• Learn how to use multimeters and other electrical testing instruments.

• Develop practical skills in voltage, current, resistance, continuity, and component testing.

• Understand single-phase and three-phase HVAC electrical systems.

• Learn how thermostats, sensors, pressure switches, and control boards regulate HVAC operation.

• Understand compressor and motor protection systems.

• Develop knowledge of fan, pump, compressor, defrost, and reversing-valve control circuits.

• Learn the fundamentals of variable frequency drives and motor-speed control.

• Understand conventional and electronic HVAC control systems.

• Develop awareness of Building Management System integration and automation.

• Learn systematic approaches to HVAC electrical fault finding and troubleshooting.

• Understand common causes of electrical, control, sensor, and motor failures.

• Develop preventive electrical maintenance and inspection skills.

• Learn safe isolation, testing, and electrical maintenance procedures.

• Improve professional documentation, reporting, and maintenance practices.

• Prepare for practical responsibilities in HVAC electrical service, facilities management, refrigeration maintenance, and building-services operations.

Course Objective

The objective of the Certificate in HVAC Electrical & Control Systems is to develop practical and technical competence in the electrical and control systems used in HVAC and refrigeration equipment. The program aims to equip learners with the ability to understand HVAC electrical circuits, interpret wiring diagrams, identify and test electrical and control components, troubleshoot common faults, inspect motors and protection systems, understand control sequences, work with sensors and electronic controls, support variable-speed and automation applications, and perform electrical maintenance activities safely and professionally.

Learning Outcomes

Upon successful completion of the program, learners will be able to:

• Explain the fundamental principles of electricity used in HVAC systems.

• Define voltage, current, resistance, power, and basic electrical relationships.

• Apply basic electrical calculations relevant to HVAC applications.

• Explain the difference between AC and DC electrical systems.

• Describe basic single-phase and three-phase electrical systems.

• Explain series and parallel electrical circuits.

• Identify common HVAC electrical components.

• Identify fuses, circuit breakers, isolators, disconnects, and protection devices.

• Explain basic earthing and grounding requirements.

• Identify common HVAC motors and explain their basic operating principles.

• Explain the electrical operation of compressors, fans, blowers, and pumps.

• Identify capacitors and explain their role in motor starting and operation.

• Explain the function of contactors and relays.

• Identify overload relays and thermal protection devices.

• Explain the purpose of control transformers and low-voltage control circuits.

• Identify terminal blocks, wiring connections, and control terminals.

• Read and interpret basic HVAC wiring diagrams.

• Identify common electrical symbols used in HVAC schematics.

• Trace basic power and control circuits.

• Identify thermostats and temperature-control devices.

• Explain the operation of pressure switches and pressure controls.

• Identify temperature, humidity, flow, and differential-pressure sensors.

• Explain the function of electronic control boards and microprocessor controllers.

• Identify timers, sequencing controls, and delay devices.

• Explain the basic operation of solenoid valves and electrically operated components.

• Explain reversing-valve electrical control arrangements.

• Explain basic electric defrost control circuits.

• Identify compressor safety and protection controls.

• Explain basic fan-speed and motor-control systems.

• Describe the purpose and basic operation of variable frequency drives.

• Understand basic soft-start and motor-control concepts.

• Explain fundamental HVAC automation and control-system principles.

• Understand the role of Building Management Systems in HVAC monitoring and control.

• Explain basic control sequences, setpoints, feedback, and system response.

• Safely use a multimeter for HVAC electrical measurements.

• Use a clamp meter for basic current measurements.

• Conduct voltage, resistance, continuity, and basic current checks.

• Perform basic capacitor testing.

• Check motor winding resistance and identify abnormal conditions.

• Test contactors, relays, and basic control components.

• Carry out basic control-circuit testing.

• Identify open-circuit and short-circuit conditions.

• Diagnose basic overload, overcurrent, and electrical protection faults.

• Diagnose common motor and compressor electrical faults.

• Troubleshoot basic thermostat and sensor problems.

• Identify common control-board and control-circuit faults.

• Diagnose basic fan, pump, compressor, defrost, and reversing-valve control problems.

• Apply systematic electrical fault-finding procedures.

• Carry out routine electrical inspection and preventive maintenance.

• Inspect wiring, terminals, connections, and control panels for visible defects.

• Recognize loose connections, overheating, damaged insulation, and other electrical hazards.

• Maintain basic electrical maintenance and test records.

• Prepare basic HVAC electrical service and troubleshooting reports.

• Apply electrical isolation and lockout/tagout principles.

• Follow safe procedures when testing energized and de-energized equipment.

• Apply appropriate electrical and fire-safety practices.

• Use suitable personal protective equipment.

• Support energy-efficient operation through appropriate motor and control-system maintenance.

• Coordinate HVAC electrical activities with mechanical, refrigeration, controls, and facilities teams.

• Complete HVAC electrical and control-system work in accordance with approved procedures, equipment requirements, manufacturer guidance, safety requirements, and professional maintenance practices.