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SOUTH AFRICAN QUALIFICATIONS AUTHORITY

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					                            SOUTH AFRICAN QUALIFICATIONS AUTHORITY
                                      REGISTERED UNIT STANDARD:

      Inspect and maintain electrical control panels and circuitry as used for air-conditioning,
                            refrigeration and ventilation installations
SAQA US ID                      UNIT STANDARD TITLE
116466                          Inspect and maintain electrical control panels and circuitry as used for air-
                                conditioning, refrigeration and ventilation installations
SGB NAME                        NSB                                PROVIDER NAME
SGB Air-conditioning            NSB 06-Manufacturing,
Refrigeration and Ventilation   Engineering and Technology
FIELD                                                              SUBFIELD
Manufacturing, Engineering and Technology                          Manufacturing and Assembly
ABET BAND                       UNIT STANDARD TYPE                 NQF LEVEL                 CREDITS
Undefined                       Regular                            Level 3                   6
REGISTRATION STATUS             REGISTRATION START                 REGISTRATION END SAQA DECISION
                                DATE                               DATE             NUMBER
Registered                      2004-10-13                         2007-10-13                SAQA 0556/04


PURPOSE OF THE UNIT STANDARD
 To inspect and maintain electrical panels used to feed power to and control air-conditioning, refrigeration
or ventilation plants
 To ensure that panels will operate safely and correctly and that no loose connection will cause damage.
 To replace any faulty electrical components.

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING
   Understanding basics of electricity.
   Apply and maintain safety in an electrical environment.
   Use and care of tools and test instruments.
   Identification of air-conditioning, refrigeration and ventilation equipment.
   Identification of electrical components and accessories.
   Interpret electrical, civil and mechanical drawings and sketches.
   Sketch and construct single-phase and three-phase circuits.
   Knowledge of the operation of air-conditioning, refrigeration and ventilation equipment.

UNIT STANDARD RANGE
Work site instructions:
Job cards, work requests and maintenance schedules.
Cleaning tools:
Blowers, vacuum cleaners, extension leads, brushes, waste, rags, cleaning solvents.
Personal protective equipment:
Overalls, aprons, safety glasses, safety shoes, face shields, masks.
Electrical testing instruments:
Voltmeter, ammeter, multimeters, insulation resistance testers and line testers.

UNIT STANDARD OUTCOME HEADER
N/A


Specific Outcomes and Assessment Criteria:

SPECIFIC OUTCOME 1
Prepare to inspect and maintain electrical panels.

ASSESSMENT CRITERIA
ASSESSMENT CRITERION 1
Task instructions are obtained and understood (interpreted).

ASSESSMENT CRITERION 2
Portable cleaning equipment is selected and checked for safety.

ASSESSMENT CRITERION 3
Electrical testing instruments are selected and tested for safety and operation.

ASSESSMENT CRITERION 4
Personal protection equipment is selected and checked for safety.

ASSESSMENT CRITERION 5
Correct cleaning solvents and materials as per works place procedures are selected.

ASSESSMENT CRITERION 6
The panel to be cleaned and maintained is identified correctly.

ASSESSMENT CRITERION 7
Arrangements are made with the relevant persons to isolate the electrical control panel.

ASSESSMENT CRITERION 8
Persons affected by plant outage are informed.

ASSESSMENT CRITERION 9
Written permission to carry out the work is obtained.

ASSESSMENT CRITERION 10
Consequences of incorrect use of cleaning materials and/or methods, solvents and materials are explained.

SPECIFIC OUTCOME 2
Inspect and maintain electrical control panel.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1
Confirmation that panel is isolated and locked out as per work site procedures is obtained.

ASSESSMENT CRITERION 2
Panel enclosures, hinges, locking devices and weather seals are visually inspected for defects.

ASSESSMENT CRITERION 3
Panel is cleaned using approved cleaning materials and solvents as per work place standards.

ASSESSMENT CRITERION 4
Correct and safe use of cleaning materials and equipment as per safety standard is demonstrated.

ASSESSMENT CRITERION 5
No damage occurred to components and/or cleaning equipment.

ASSESSMENT CRITERION 6
All electrical control panel labels are checked.

ASSESSMENT CRITERION 7
Presence of electrical wiring diagram and operating instructions is checked.

ASSESSMENT CRITERION 8
Appropriate use of personal protective equipment is demonstrated.

SPECIFIC OUTCOME 3
Inspect and maintain electrical circuitry in electrical control panels.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1
Confirmation that electrical control panel is isolated and locked out as per work site procedures is obtained.

ASSESSMENT CRITERION 2
All connections are checked for tightness, proper contact and correct size.

ASSESSMENT CRITERION 3
Electrical control panel components are blown out or vacuumed using the appropriate equipment and safety
procedures.

ASSESSMENT CRITERION 4
No damage occurred to components and/or cleaning equipment.

ASSESSMENT CRITERION 5
All indication lights, components and instruments are checked for proper working order.

ASSESSMENT CRITERION 6
Faulty components are identified and replaced

ASSESSMENT CRITERION 7
Sequence operation of all components is checked and found to be as per the operating instructions.

ASSESSMENT CRITERION 8
Any changes made to the electrical control panel are recorded on the wiring diagram and the operating
instructions.

SPECIFIC OUTCOME 4
Conclude the inspection and maintenance of electrical panels.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1
Electrical control panel is re-energised and locked.

ASSESSMENT CRITERION 2
All defects and suspected faults are recorded and reported in line with work site instructions.

ASSESSMENT CRITERION 3
All defective components are correctly disposed of in accordance with work site instructions.
ASSESSMENT CRITERION 4
The cleaning solvents are properly sealed/closed and correctly stored to prevent hazardous fumes,
substance spillage and risk of fire.

ASSESSMENT CRITERION 5
All equipment is returned to the store as per work site housekeeping instructions.

ASSESSMENT CRITERION 6
Job card and maintenance report are completed as per work site instructions.

ASSESSMENT CRITERION 7
Relevant persons are informed that the work is completed.



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 air-conditioning and refrigeration

UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE
 The importance of a correctly operating electrical panel for an air-conditioning, refrigeration or ventilation
installations.
 Safe working procedures.
 The use and application of chemical cleaning solvents.
 The use of electrically operated cleaning tools.

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 actual and possible electrical faults in electrical control panels

UNIT STANDARD CCFO WORKING
Work effectively with others
 Co-operation with co-workers and client

UNIT STANDARD CCFO ORGANIZING
Organize and manage myself and my activities responsibly and effectively
 Selecting required cleaning tools, testing instruments and cleaning solvents

UNIT STANDARD CCFO COMMUNICATING
Communicate effectively
 By oral or written means communicate with superiors and clients.

UNIT STANDARD CCFO SCIENCE
Use science and technology effectively and critically
 By understanding the plant operating sequences.
  UNIT STANDARD ASSESSOR CRITERIA
  N/A

  UNIT STANDARD NOTES
  Supplementary information:

  Specific requirements are contained in one or more of the following documents:
   Company procedures and guidelines regarding retrieval of piping, fittings and insulation material from
  stores.
   The OHS Act, or
   SANS 10142-1.
  All work to be done with panels correctly de-energised.

  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.



All qualifications and unit standards 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.

				
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