SAQA All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Fault find, repair and maintain AC motors, circuitry and controls as applied to air conditioning, refrigeration and ventilation installations 
SAQA US ID UNIT STANDARD TITLE
116463  Fault find, repair and maintain AC motors, circuitry and controls as applied to air conditioning, refrigeration and ventilation installations 
ORIGINATOR
SGB Air-conditioning Refrigeration and Ventilation 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 06 - Manufacturing, Engineering and Technology Manufacturing and Assembly 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 3  NQF Level 03  8 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2026-06-30   2029-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
To enable a person working in the air conditioning, refrigeration or ventilation industry to:
  • Faultfind and repair, with the aid of electrical diagrams, electrical faults in AC circuits.
  • Maintain AC electric motors, electrical circuitry and controls.
  • Determine malfunction in commonly used controls in air conditioning, refrigeration and ventilation installations. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
  • Understanding of the fundamentals of electricity.
  • Sketch and construct single and three-phase circuits.
  • Knowledge of the operation of electrical equipment on three-phase air conditioning, refrigeration and ventilation equipment.
  • Apply and maintain safety in an electrical environment.
  • Use of tools and electrical test instruments. 
    		•

    UNIT STANDARD RANGE 
    Power supplies:
    Maximum 1 000 volt, three-phase-four-wire
    Motors and starters:
    Direct on line, Star-Delta, Part-wind motors and starters including soft starters and speed controllers.
    Protection devices:
    Three-phase circuit breakers, three-phase earth leakage relays, overload protection devices, phase failure relays, phase rotation relays and over/under voltage relays.
    Electrical control panel accessories:
    Door interlocked isolators (plain and fused), neutral links, current transformers, running hour meters, Auto-off-manual selector switches,
    Typical circuits:
    Circuits for 2, 4, 6 and 8 pole three-phase -single speed induction motors, including the following:
  • Fuses, circuit breakers, overloads, lock-out stops, isolators and controls.
  • Sequence starting arrangements via interlocks or timers.
  • Delay-on and delay-off timers
  • Protection devices.
    Circuits for:
  • Heaters including control and protective devices.
  • Humidifiers. 
    		•

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Plan to maintain electric motors, circuitry and controls. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Planning is done to conform to maintenance schedules. 

    ASSESSMENT CRITERION 2 
    Planning is integrated with other disciplines and associated equipment. 

    ASSESSMENT CRITERION 3 
    Planning is arranged according to equipment operating history reports and failure rate. 

    ASSESSMENT CRITERION 4 
    Planning is arranged in accordance with plant availability and customer requirements. 

    ASSESSMENT CRITERION 5 
    Cognizance is taken of the complexity and size of the plant. 

    ASSESSMENT CRITERION 6 
    Consequences of inadequate maintenance are listed and explained. 

    SPECIFIC OUTCOME 2 
    Prepare to maintain electric motors, circuitry and controls. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Correct / applicable electrical wiring and control diagrams and operating instructions are obtained. 

    ASSESSMENT CRITERION 2 
    Tools and equipment required is obtained and checked for safety. 

    ASSESSMENT CRITERION 3 
    Suitable personal protective equipment is obtained and checked. 

    ASSESSMENT CRITERION 4 
    Electric motors, circuitry and controls to be maintained are identified as per work site instructions. 

    ASSESSMENT CRITERION 5 
    Safety and security lock-out system is applied as per work site instructions, where required. 

    ASSESSMENT CRITERION 6 
    Location and purpose of installing warning signs are explained. 

    SPECIFIC OUTCOME 3 
    Maintain AC motors, circuitry and controls. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Plant is isolated electrically in accordance with work site procedures. 

    ASSESSMENT CRITERION 2 
    Safe isolation of all circuits is verified and reasons for are explained. 

    ASSESSMENT CRITERION 3 
    AC motors, circuitry and controls are maintained according to work site instructions and/or manufacturer's instructions to prevent breakdowns and loss of operation/service 

    ASSESSMENT CRITERION 4 
    Work is carried out without injury to persons or damage to equipment. 

    ASSESSMENT CRITERION 5 
    All tools and instruments are used for the purpose intended. 

    SPECIFIC OUTCOME 4 
    Identify and repair faults on AC motors, circuitry and controls. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Plant operation is discussed with client to determine faulty operation. 

    ASSESSMENT CRITERION 2 
    Correct sequence of operation is determined from control diagrams or are as per job instructions. 

    ASSESSMENT CRITERION 3 
    Applicable testing instruments, tools, equipment, materials and components are selected according to job requirements. 

    ASSESSMENT CRITERION 4 
    Plant operation is observed to identify possible causes of faults. 

    ASSESSMENT CRITERION 5 
    Applicable circuit drawings are interpreted to determine possible causes of fault. 

    ASSESSMENT CRITERION 6 
    Electrical circuits and control gear are correctly identified. 

    ASSESSMENT CRITERION 7 
    Faultfinding is done by making use of logical method according to faultfinding techniques. 

    ASSESSMENT CRITERION 8 
    Applicable safety equipment is selected and used as intended. 

    ASSESSMENT CRITERION 9 
    Applicable/suitable tools, equipment, materials and components to rectify the faults are selected. 

    ASSESSMENT CRITERION 10 
    Faults are safely repaired according to worksite procedures. 

    ASSESSMENT CRITERION 11 
    Fault-finding results are recorded according to work site procedures. 

    ASSESSMENT CRITERION 12 
    Faults that endanger life are reported immediately to relevant persons. 

    ASSESSMENT CRITERION 13 
    All work is carried out without injury to persons or damage to equipment, tools and/or instrumentation. 

    SPECIFIC OUTCOME 5 
    Replace any and all faulty components. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Components of any nature, found to be faulty, are replaced with suitable, correctly sized and functioning ones, using techniques or procedures approved by the manufacturer and using good electrical and mechanical practice. 

    ASSESSMENT CRITERION 2 
    No good components are discarded or damaged in the process. 

    SPECIFIC OUTCOME 6 
    Complete the work task. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Circuitry and control gear is re-commissioned and checked for correct operating sequence. 

    ASSESSMENT CRITERION 2 
    Panels, enclosure doors and/or covers are properly secured or locked to restrict unauthorised access. 

    ASSESSMENT CRITERION 3 
    Lockout devices and warning signs are removed. 

    ASSESSMENT CRITERION 4 
    Work area is cleared on completion of the task and waste materials are disposed of according to housekeeping requirements. 

    ASSESSMENT CRITERION 5 
    Job cards and or work orders and check sheets are correctly completed and the maintenance report is submitted. 

    ASSESSMENT CRITERION 6 
    Relevant wiring diagrams, drawings and/or operating instructions are updated if changes have been made. 

    ASSESSMENT CRITERION 7 
    Arrangements are made for the work to be verified, certified and tested by an accredited person in accordance with SANS 10142-1 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
    Any person wishing to be assessed against this unit standard may apply to an assessment agency, assessor or provider institution accredited by the relevant ETQA, who may appoint a moderator to be present at the assessment.
    The assessor must have knowledge and experience of electrical as applied to air-conditioning, refrigeration and ventilation. 

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Safe working practices.
    Operation of electric motors and their starting methods.
    Knowledge about electrical components and accessories and how they function in electrical circuits.
    Reasons for and methods of controlling and protecting electrical circuits and equipment.
    Knowledge about electrical control panel construction and interpretation of electrical wiring diagrams. 

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems
  • Identifying electrical components and accessories.
  • Identify possible malfunctions. 
    		•

    UNIT STANDARD CCFO ORGANISING 
    Organize and manage myself and my activities responsibly and effectively
  • Prepare, plan and select information from diagram.
  • Maintain safety whilst working with electricity.
  • Selecting required components and planning construction of circuits. 
    		•

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively
  • By oral or written reporting. 
    		•

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically
  • Interpreting electrical diagrams.
  • By understanding the principles of electricity involved 
    		•

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    Supplementary information:

    Specific requirements regarding the installation and operation of electrical equipment and accessories are contained in one or more of the following documents:
  • Manufacturer's instructions
  • Electrical wiring diagrams and plant operating instructions.
  • Company procedures and guidelines.

    Any person learning towards the National Certificate in Air-conditioning, Refrigeration and Ventilation at NQF level 3 shall not work on electrical equipment or electrical control panels unless such person has been assessed competent in the unit standards on NQF levels 2 and 3 involving electrical work on such equipment or control panels and feels confident and comfortable to carry out such work. 
    		•

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  48963   National Certificate: Air-Conditioning, Refrigeration and Ventilation  Level 3  NQF Level 03  Passed the End Date -
    Status was "Reregistered"     		 2009-03-12  Was MERSETA until Last Date for Achievement 
    Core  65509   Further Education and Training Certificate: Air-conditioning, Refrigeration and Ventilation  Level 4  NQF Level 04  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  MERSETA 
    Elective  50371   Further Education and Training Certificate: Domestic Appliance Repair  Level 4  NQF Level 04  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  EWSETA 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 


    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.