Page 282 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

EXERCISE 102 : Demonstrate dismantling, servicing,

re-assembling &testing of domestic
appliance

Objectives

At the end of this exercise you shall be able to:
• list out the dismantling procedure for domestic appliances
• list out the servicing procedure for domestic appliances
• reassemble the domestic appliance
• test the domestic appliance

Procedure

TASK 1: List out the dismantling procedure for domestic appliances
1 List the space requirements, required tools and parts, power supply availability for dismantling

2 Trace the serial and model number of the appliance and service manual and if unavailable from the appliance.
3 Follow the instructions from manual to dismantle appliance if available.
4 Kee the parts in sequence when disassembled and do the reverse, starting with the last part, for reassembly.
5 Put the disassembled parts in clean containers when disassembled to avoid any missing

TASK 2: list out the servicing procedure for domestic appliances

1 Test the component of dismantled appliance as referred in service manual
2 Clean the dust and moisture in the appliance.
3 Inspect for decoloring or rusting of parts.
4 Replace the aged components as required

TASK 3: Reassemble the domestic appliance
1 Record the works done in service report.
2 Follow the appliance service manual for reassembly.

3 Tighten the electrical and mechanical connections

TASK 4: Test the domestic appliance
1 Operated the appliance as per user manual instructions
2 Test for insulation resistance between supply terminals and body

3 Reconnect all earth connections of the appliance
4 Use series test lamp to energise the appliance.

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CITS : Power - Electrician & Wireman - Exercise 101