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Domestic Refrigeration Units Maintenance And Repair

Refrigeration And Air Conditioning · Level 5  ·  7 Chapters

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What Domestic Refrigeration Units Maintenance And Repair covers

In this unit, you will be able to confidently diagnose, repair, and maintain domestic refrigeration units by interpreting technical diagrams and manuals with ease. You will master safe and environmentally responsible practices, using the right tools and procedures to recover refrigerants, replace faulty parts, and perform retrofitting accurately. By the end, you’ll be equipped to deliver reliable service while upholding workplace safety, environmental standards, and excellent housekeeping, preparing you to excel in the refrigeration trade.

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Careers after Domestic Refrigeration Units Maintenance And Repair

Mastering Domestic Refrigeration Units Maintenance and Repair opens doors to a vital and growing sector in Kenya, where reliable refrigeration is essential in homes, businesses, and industries. This skill equips you to ensure refrigeration units run efficiently, saving costs and supporting food preservation, healthcare, and commerce.

  • In the Jua Kali sector, skilled technicians maintain and repair domestic refrigerators, serving households and small businesses, often running their own repair workshops or offering mobile services.
  • Within hospitality venues like hotels, lodges, and restaurants across Kenya, your expertise ensures food safety and customer satisfaction by keeping refrigeration units in top condition.
  • In agribusiness hubs such as those linked to KTDA (Kenya Tea Development Agency) and local dairy cooperatives, refrigeration maintenance is crucial for preserving perishable produce, helping farmers reduce losses and increase income.
  • Working with county governments and public health facilities, you can contribute to maintaining cold chain systems for vaccines and medicines, a critical public service.
  • The matatu industry also relies on refrigeration units for transporting perishable goods; your skills help keep these units operational, supporting the transport and logistics sector.
  • Skilled technicians in companies like KenGen may also find opportunities maintaining refrigeration systems in staff housing and operational facilities.
  • By mastering safe refrigerant recovery and environmental compliance, you position yourself as a responsible professional aligned with Kenya’s environmental laws, increasing your employability and trustworthiness.
  • Whether employed by service companies or running your own enterprise, you can earn a sustainable income by offering installation, maintenance, and emergency repair services to a wide clientele.

By mastering these skills, you become an indispensable part of Kenya’s growing economy, improving lives through technology and environmental stewardship. Your expertise will empower you to build a rewarding career or a thriving business, making a real difference in communities across the country.

Chapters

1
Identify and repair faults in refrigeration units
21 topics
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2
Carry out refrigerant recovery
10 topics
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3
Service refrigeration units
26 topics
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4
Pressure testing refrigeration units
4 topics
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5
Evacuate refrigeration units
5 topics
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6
Charge refrigeration units
9 topics
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7
Test-run the maintained Refrigeration units
7 topics
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What Domestic Refrigeration Units Maintenance And Repair covers: 68 main topics in 7 chapters

1. Identify and repair faults in refrigeration units

  1. 1.1 Fundamentals of refrigeration iagrams, charts and manuals
  2. 1.2 Identification of faults
  3. 1.3 Leaks
  4. 1.4 High current
  5. 1.5 Under performance
  6. 1.6 Unusual noise
  7. 1.7 Vibrations
  8. 1.8 Electrical parts, components, functions and operations
  9. 1.9 Procedures for testing electrical components
  10. 1.10 Troubleshooting electrical faults
  11. 1.11 Procedures for repairing/replacing electrical components
  12. 1.12 Mechanical parts, components, functions and operation
  13. 1.13 Troubleshooting mechanical faults
  14. 1.14 Repair of refrigeration units

2. Carry out refrigerant recovery

  1. 2.1 Type of refrigerant
  2. 2.2 Terms and concepts of refrigerant recovery
  3. 2.3 Tools, equipment and materials
  4. 2.4 Decommissioning procedures for hydrocarbon RAC systems
  5. 2.5 Safe procedures for handling potentially hazardous system materials, including hydrocarbon refrigerants
  6. 2.6 Calculate the safe fill weight for the recovery cylinder (density difference between HFCs and HCs)
  7. 2.7 Preparation for recovery
  8. 2.8 Pressure testing of the cylinder
  9. 2.9 Connecting manifold gauge set
  10. 2.10 Performing refrigerant recovery

3. Service refrigeration units

  1. 3.1 Identification and interpretation of refrigeration symbols
  2. 3.2 Interpretation of drawings
  3. 3.3 Fundamentals of refrigeration cycle
  4. 3.4 Refrigeration unit components
  5. 3.5 Operating parameters of refrigeration systems e.g. temperature, pressure, current
  6. 3.6 Types of refrigerants
  7. 3.7 Types of lubricants
  8. 3.8 Safe handling of refrigerants (including hydrocarbons)
  9. 3.9 Safety in handling nitrogen gas
  10. 3.10 Servicing/replacing components
  11. 3.11 Service and maintenance procedures for hydrocarbon RAC Units
  12. 3.12 Specify appropriate 'like for like' replacement components on hydrocarbon systems for the following:
  13. 3.13 Maintaining the integrity of sealed electrical enclosures
  14. 3.14 Methods for accessing and sealing hydrocarbon systems
  15. 3.15 Service, maintenance and fault diagnosis procedures on hydrocarbon systems including:
  16. 3.16 industry standards/codes of practice
  17. 3.17 information from system users
  18. 3.18 State the requirements for the safe use of vacuum pumps when evacuating hydrocarbon systems
  19. 3.19 Explain the procedure for safely removing and replacing hydrocarbon RAC system components
  20. 3.20 Types of Ozone depleting substances (ODS)
  21. 3.21 Effects of refrigerants on climate change

4. Pressure testing refrigeration units

  1. 4.1 Pressure strength test
  2. 4.2 Pressure tightness test
  3. 4.3 Applicable ISO standards
  4. 4.4 KS ISO 5149-2:2014 Para 5.3 5 Evacuation of refrigeration units

5. Evacuate refrigeration units

  1. 5.1 Identifying unit for evacuation
  2. 5.2 Health, safety and environmental requirements
  3. 5.3 Tools, equipment and instruments
  4. 5.4 Evacuation Procedure
  5. 5.5 Housekeeping practices 6 Charge refrigeration units

6. Charge refrigeration units

  1. 6.1 Identifying refrigeration unit to be charged
  2. 6.2 Identifying relevant refrigerant
  3. 6.3 Health and safety requirements and standards
  4. 6.5 Refrigeration Charging Procedure
  5. 6.6 Hydrocarbon charging (R290, R600a)
  6. 6.7 Housekeeping practices
  7. 6.8 Preparing refrigeration charging report 7 Test-run maintained refrigeration units

7. Test-run the maintained Refrigeration units

  1. 7.1 Temperature testing
  2. 7.2 Current and voltage measurement
  3. 7.3 Sound and vibration checking
  4. 7.4 Operation of refrigeration unit within acceptable parameters
  5. 7.5 Training the user on use of the unit
  6. 7.6 Handing over procedures
  7. 7.7 Report writing S/No. Quantity Recommended Ratio (Item: Trainee) A

Practise this unit

The practical 67 The assessment itself: tools, materials and the marks Step-by-step guide 67 PPE, each step, what good looks like, common mistakes

Revise this unit

Exam-style questions 98 Written to CDACC standard, with answers Test yourself 277 Multiple-choice, one at a time Practise questions 185 Quick recall — check you know the facts
3 more for this unit
Oral exam preparation 65 What the assessor asks, and how to answer out loud Worked calculations 42 Step-by-step maths with the common mistakes Quick cards 1,391 Myth busters, skill tips and scenarios

Beyond the syllabus

Decision simulator 7 On site, what would you do? Workplace scenarios 142 Real site situations — what would you do? Turn this into income 84 Where this skill earns — what to charge, how to find clients

Other units in Module I