Specifications

144
Not starting Low applied voltage
Supply failure
Open in winding.
Condenser open or short.
Open in regulator resistor/
switch.
Check the voltage and adjust
if possible.
Check the supply points at
switch, regulator ceiling rose
and the terminal of the fan.
Check for the continuity of
auxillary and main winding.
Check the capacitor with a
Megger.
Check for open or loose
contact in the resistor or
contacts.
HAIR DRYERS
13.8 Function:
We are all very familiar with the daily routine; we wash our hair and then automatically pick
up the hairdryer, flip the switch and there is the hot air to dry quickly and let us get on with the
day. There are good reasons for people to dry their hair with a hairdryer, going out with wet hair
especially in the winter can be bad for our health, and lead to catching colds and chills. A hair
dryer also called blow dryer is an electrical device which can be used for styling and drying the
hair by speeding up the evaporation of water from the hair’s surface.
13.9 Types of Hair Dryer:
i. Portable type hair dryer ii. Saloon (Bonnet) type hair dryer
Both the hair dryers supply hot air to dry the wet hair on the common principle of blowers
with a heating element. A Bonnet type hair dryer model is shown in Fig.13.7
13.10 Constructional parts of Hair Dryer:
Fig.13.7 - Bonnet type hair dryer
A hair dryer needs only two parts to
generate the blast of hot air that dries the hair:
a simple motor-driven fan
a heating element
But in additon to above parts, most basic
models will have have two switches, one to
turn them on and off and one to control the
rate of airflow. Some models have an extra
switch, called thermostat switch, used to
regulate the temperature of the airflow.