Unit of competency Outline

Date retreived
22/07/2026 5:06 AM AWST

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Diagnose faults in complex HVAC/refrigeration control systems

Diagnose faults in complex HVAC/refrigeration control systems

Unit of competency
National Code
UEERA0033
State Code
OBY14
TGA Status
Current
DTWD Status
Approved
Current Release Number
1.00
Current Release Date
05/10/2020
View on TGA
State Implementation and Classification
Approved Date
12/07/2021
Field of Education
031315 - Refrigeration And Air Conditioning Mechanics
Original Release Date
12/07/2021
Nominal Hours
72
Description
This unit involves the skills and knowledge required to diagnose and rectify faults in complex heating, ventilation and air conditioning (HVAC) or refrigeration control systems.It includes applying safe working practices, interpreting technical data and applying knowledge of complex refrigeration or HVAC control system operating parameters to logical fault-finding processes. It also includes implementing fault rectification, safety and functional testing; and completing and reporting fault diagnosis and rectification activities and outcomes.The skills and knowledge described in this unit require a licence or permit to practice in the workplace where work is carried out on electrical installations which are designed to operate at voltages greater than 50 volt (V) alternating current (a.c.) or 120 V direct current (d.c.).Competency development activities in this unit are subject to regulations directly related to licensing. Where a licence or permit to practice is not held, skills and knowledge described in this unit require a relevant contract of training, such as an Australian Apprenticeship.Additional and/or other conditions may apply in some jurisdictions subject to regulations related to refrigeration, air conditioning or electrical work. Practice in the workplace and during training is also subject to work health and safety (WHS)/occupational health and safety (OHS) regulations.Permits may also be required for some work environments, such as confined spaces, working aloft, near live electrical apparatus and site rehabilitation.
Notes
Elements and Performance Criteria
1 Prepare to diagnose and rectify faults
  • 1.1 WHS/OHS requirements and workplace procedures are identified, obtained and applied
  • 1.2 WHS/OHS risk control measures and procedures are followed
  • 1.3 Hazards not previously identified are documented and risk control measures devised and implemented in consultation with relevant person/s
  • 1.4 Extent of faults are determined from reports/documentation and/or discussions with relevant person/s
  • 1.5 Relevant person/s is consulted to ensure work is coordinated effectively with others involved on the worksite
  • 1.6 Tools, equipment and testing devices required to diagnose faults are obtained and checked for correct operation and safety in accordance with workplace procedures
2 Diagnose and rectify faults
  • 2.1 WHS/OHS risk control measures and workplace procedures for carrying out the work are followed
  • 2.2 Need to test and measure live work is determined in accordance with workplace procedures and WHS/OHS requirements
  • 2.3 Circuits/machines/plant are checked and isolated in accordance with workplace procedures and WHS/OHS requirements
  • 2.4 Logical diagnostic methods, measurements and estimations are applied to diagnose control system faults in accordance with system operating parameters and operational requirements
  • 2.5 Suspected fault sources are tested to confirm source of system problems
  • 2.6 Fault causes are identified and appropriately competent person/s engaged to rectify the fault where it is outside the scope of the control system
  • 2.7 Faults in system components are rectified to return the refrigeration or HVAC system to its operational standard
  • 2.8 System is tested to verify that the system operates as intended and to specified requirements and operational standards
  • 2.9 Methods for resolving unplanned events are discussed with appropriate person/s in accordance with job specifications and requirements
  • 2.10 Methods for resolving unplanned situations are selected on the basis of safety and specified work outcomes
  • 2.11 Diagnosis and rectification activities are conducted without waste of materials, damage to apparatus, the surrounding environment and/or services using sustainable energy practices
3 Complete and report fault diagnosis and rectification activities
  • 3.1 WHS/OHS work completion risk control measures and workplace procedures are followed
  • 3.2 Worksite is made safe in accordance with workplace safety procedures
  • 3.3 Fault diagnosis and rectification activities are documented in accordance with workplace procedures
  • 3.4 Appropriate person/s is notified that system faults have been rectified in accordance with workplace procedures
No information
No information
Replaces
State Code National Code Title Type
S7357 UEENEEJ122A Diagnose faults in complex HVAC /refrigeration control systems Unit of competency