Page 284 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

8 Check for water leakages / aged gaskets / loose screws and rectify
9 Remove any sediment collection
10 check for noises in operation/discoloration of water / foul smell
11 Replace any worn power cables.
Motorized domestic appliance
1 Check for proper direction of rotation after a maintenance
2 Keep the terminal and body properly insulated to avoid unwanted RCCB tripping
3 Check for any noises, from fan and bearings or other parts
4 Keep the motor always dry
5 Replace the loose belts/ adjust the tightness
6 Lubricate the bearings.
7 Check for error code in service manual for digital control appliances
Micro wave oven
1 Do not operate or allow the oven to be operated with the door open.
2 check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and
connections before turning on microwave power for any service test or inspection within the microwave
generating compartments
3 DO NOT operate on a 2-wire extension cord during repair
4 Do not put iron tools on the magnetron
5 Do not put anything into the latch hole and the interlock switches area

6 Check for microwave energy leakage after every servicing. The power density of the microwave radiation
leakage emitted by the microwave oven should not exceed 1mW/cm2.sq
7 Refer the Table for troubleshooting guidelines. Normal values are mentioned in Table. Replace component if
the test result value is not normal.

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CITS : Power - Electrician & Wireman - Exercise 103