HVAC Module 03312: Troubleshooting
Accessories Questions with Correct Answers
HVAC Accessories
Common components in residential and light commercial systems including humidifiers,
electronic air cleaners, ultraviolet lighting, air-side economizers, and energy and heat
recovery ventilators.
Troubleshooting Process
The methodical approach to identifying and resolving issues within HVAC system
accessories.
Residential Humidifiers
Devices that introduce water vapor into the conditioned air supply at a predetermined rate.
Electronic Air Cleaners
Devices that use electronic methods to filter and clean the air in HVAC systems.
Ultraviolet Lighting Devices
Devices that use UV light to reduce microbial growth in air and surfaces.
Air-side Economizers
Systems that use outside air to reduce the need for mechanical cooling.
Energy and Heat Recovery Ventilators
Devices that exchange stale indoor air with fresh outdoor air while recovering energy from
the outgoing air.
Electrical Troubleshooting Skills
, Skills necessary for diagnosing electrical issues in HVAC accessories, including isolating
faulty circuits and components.
Isolating a Faulty Circuit
The process of determining which circuit is malfunctioning by eliminating those that are
functional.
Single-phase and Three-phase Voltage Measurement
Techniques for measuring voltage in single-phase and three-phase electrical systems.
Fuse and Circuit Breaker Testing
The process of checking fuses and circuit breakers for functionality.
Resistive and Inductive Load Testing
Methods for testing electrical loads to determine their operational status.
Control Transformer Testing
The evaluation of control transformers to ensure they are functioning correctly.
Accessory Literature
Documentation that provides troubleshooting information, including sequence of operation
and wiring diagrams.
Onboard Diagnostics
Integrated diagnostic tools within control boards and modules that assist in troubleshooting.
Sequence of Operation
The specific order of steps that must be completed in troubleshooting HVAC accessories.
Accessories Questions with Correct Answers
HVAC Accessories
Common components in residential and light commercial systems including humidifiers,
electronic air cleaners, ultraviolet lighting, air-side economizers, and energy and heat
recovery ventilators.
Troubleshooting Process
The methodical approach to identifying and resolving issues within HVAC system
accessories.
Residential Humidifiers
Devices that introduce water vapor into the conditioned air supply at a predetermined rate.
Electronic Air Cleaners
Devices that use electronic methods to filter and clean the air in HVAC systems.
Ultraviolet Lighting Devices
Devices that use UV light to reduce microbial growth in air and surfaces.
Air-side Economizers
Systems that use outside air to reduce the need for mechanical cooling.
Energy and Heat Recovery Ventilators
Devices that exchange stale indoor air with fresh outdoor air while recovering energy from
the outgoing air.
Electrical Troubleshooting Skills
, Skills necessary for diagnosing electrical issues in HVAC accessories, including isolating
faulty circuits and components.
Isolating a Faulty Circuit
The process of determining which circuit is malfunctioning by eliminating those that are
functional.
Single-phase and Three-phase Voltage Measurement
Techniques for measuring voltage in single-phase and three-phase electrical systems.
Fuse and Circuit Breaker Testing
The process of checking fuses and circuit breakers for functionality.
Resistive and Inductive Load Testing
Methods for testing electrical loads to determine their operational status.
Control Transformer Testing
The evaluation of control transformers to ensure they are functioning correctly.
Accessory Literature
Documentation that provides troubleshooting information, including sequence of operation
and wiring diagrams.
Onboard Diagnostics
Integrated diagnostic tools within control boards and modules that assist in troubleshooting.
Sequence of Operation
The specific order of steps that must be completed in troubleshooting HVAC accessories.
