9) Motor : Drive a rotating force by electric power and supply the driving force to fan and blower in both indoor and
outdoor of air conditioner.
10) Fan : Serve to blow air through condenser and blow out the heat generated with refrigerant liquified in con-
denser. Its structure is similar with a motor fan.
11) Blower (Cross Flow Fan: C.F.F) : Suck room air, blow into evaporator, make evaporator absorb the heat, and
disperse the cooled air into room. Blower is placed indoor unit, so a small size, high wind flow and low
noise type is used.
12) Thermostat (Thermistor) : Sense the suction air into room and regulate automatically room temperature by
compressor on/off depending on temperature. Thermostat is used for a mechanical type model and ther-
mistor for a micom type control method.
13) Capacitor : Supply a driving torque to the compressor motor or fan motor for aircon and make the operating
efficiency better during operation.
14) Over load protector (O.L.P) : A protective device of automatic return type which is placed in the wire of com-
pressor and shuts off the power of compressor motor against the overheat and overcurrent of compressor.
At this time, compressor is stopped operating by power off and fan only is at work. Generally the working
temperature is 115±5°C and the return temperature is 93±5°C.
15) High pressure switch (H.P.S/W) : A protective device of automatic return type which protects compressor
from overload by sensing the discharge pressure of compressor, working at an abnormal high temperature,
and shutting off the electric circuit. Generally the working pressure is 28kg/cm
2
G and the return pressure is
23 kg/cm
2
G.
16) Sump heater : A cord heater which is wound around the compressor bottom, and its type is decided depend-
ing on the capacity of compressor. If compressor is not at work at power on, sump heater is at work
whereas if compressor works, sump heater does not work, so be sure to always keep the compressor
temperature higher than any other unit.
17) Accumulator : A kind of liquid refrigerant separator which prevents the liquid refrigerant from sucking into
compressor and is installed in the suction inlet of compressor.
18) Reversing valve (4 way valve) : Convert the flow of refrigerant upon cooling/heating switch-over, electrically
power on when heating and off when cooling, be installed in outdoor, and have four connecting valves as
shown in the name. The refrigerant passing through compressor always flows to a constant direction and
is able to reverse-operate completely the refrigerating cycle of both cooling and heating by a reversing
valve. Consist of reversing valve and solenoid valve. The main valve in reversing valve uses a nylon resin
which is deformed by heat 120°C or over and thus causes valve not to work, so be cautious while
operating or when welding.
TCL Air Conditioner Service Manual
8