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SERVICING OF ELECTRICAL APPLIANCES  

2023 REGULATION
Theory Portion :
UNIT I DOMESTIC APPLIANCES I Period

ELECTRICAL IRON BOX: Tools and instruments required for Servicing of Electrical
Appliances – Various Parts of Non-Automatic and Automatic Iron Box – Connection
Diagram – Common defects – Causes.
ELECTRIC HEATER: Various Parts of Water Heater – Types of Water Heater – Parts
of Room Heater – Connection Diagram of water Heater and Room Heater – Common
defects – Causes.
ELECTRIC FANS: Construction of Ceiling Fan – Connection Diagram – Checking of
Capacitor – Common defects – Overview of Table Fan and Exhaust Fan.
ELECTRIC MIXER GRINDER: Identification of various Parts – Working principles –
Connection Diagram – Checking of carbon brush and OLR – Common defects –
causes.

Practical Exercises: Perform the experiments by using actual electrical appliances and
Trainer Kits are not allowed.
Ex.No Name of the Experiment Period

1.SERVICING OF AUTOMATIC IRON BOX
Activities to Perform:
 Dismantle and Identify the parts of Iron Box.
 Check the condition of thermostat and Power cord.
 Do technical check (OC, SC and Earth Fault, etc.,) and Rectify the
fault if any.
 Re-assemble and Test its working with supply.

2.SERVICING OF WATER HEATER
Activities to Perform:
 Dismantle and Identify the parts of ceiling fan.
 Check the condition of thermostat and Power cord.
 Do technical check (OC, SC and Earth Fault, etc.,) and Rectify the
fault if any.
 Re-assemble and Test its working with supply.

3.SERVICING OF CEILING FAN & TABLE FAN
Activities to Perform:
 Dismantle and Identify the parts of ceiling fan and Table fan.
 Check the condition of capacitor and bearings.
 Do technical check (OC, SC and Earth Fault, etc.,) and Rectify the
fault if any.
 Re-assemble and Test its working with supply.

4.SERVICING OF MIXER GRINDER
Activities to Perform:
 Dismantle and Identify the parts of Mixer Grinder.
 Check the condition of Carbon Brush, Selector Switch and OLR.
 Do technical check (OC, SC and Earth Fault, etc.,) and Rectify the
fault if any.
 Re-assemble and Test its working with supply.

UNIT II DOMESTIC APPLIANCES II Period
ELECTRIC WET GRINDER: Identification of various Parts – Connection Diagram –
Common defects – causes.
INDUCTION STOVE: Specifications – Various parts – Working Principle of Induction
Stove – Features – Electrical Circuit Diagram – Common defects – causes.
MICROWAVE OVEN: Various Parts – Connection Diagram – Testing Heating element
– Checking and testing of Magnetron – Common defects – causes.
OFF GRID SOLAR PV SYSTEM: Connection diagram of Solar Panel with
Inverter/Charge Controller and Battery.

Practical Exercises: Period

5.SERVICING OF WET GRINDER
Activities to Perform:
 Dismantle and Identify the parts of Wet Grinder.
 Check the condition of Capacitor, Centrifugal Switch and
Bearings.
 Do technical check (OC, SC and Earth Fault, etc.,) and Rectify the
fault if any.
 Re-Assemble and Test its working with supply.

6.SERVICING OF PORTABLE INDUCTION STOVE
Activities to Perform:
 Dismantle and Identify the parts of Portable Induction Stove.
 Do technical check by referring the Error Codes and Rectify the
fault if any.
 Re-Assemble and Test its working with supply.

7.SERVICING OF MICROWAVE OVEN
Activities to Perform:
 Dismantle and Identify the parts of Micro Oven.
 Do technical test as per the service manual on Transformer,
Magnetron, Capacitor, Motors and Control Panel and Rectify the
fault if any.
 Re-Assemble and Test its working with supply.

8.INSTALLATION OF OFF GRID SOLAR PV SYSTEM
Activities to Perform:
 Install of Solar Panel, Charge Controller, Inverter and Battery and
make connections.
 Do technical checks on above items and Rectify the fault.
 Test its working with load.