ADJUSTMENT
1 COMPRESSOR3) PTC-Applied Circuit Diagram
1) Rolel According to Starting Method for the Motor
The compressor intakes low temperature and low pressure
gas evaporated from Evaporator of the Refrigerator, and
OVERLOAD PROTECTOR(O.L.P)
condenses this gas to high temperature and high pressure
gas, and then plays delivering role to Condenser.
C
2) Composition
COMPRESSOR
PTC
The Compressor is Composed of Compressor Apparatus5
MOTOR
compressing gas, Compressor Motor moving Compressor
M
S
Apparatus and Case protecting Compressor ApparatusM
S
36
and Motor. There are PTC-Starter, and Over Load
Protector (OLP) in the Compressor outside. On the other
hand, because the Compressor consists of 1/1000mm processingPTC STARTERHERMETIC
TERMINAL
precision components and is sealed after production in absence
RSIR
of dust or humidity, deal and repair with care.
Figure 19
3) Note for Usage
(1) Be careful not to allow over-voltage and over-current.
4) Motor Restarting and PTC Cooling
(2) No Strike
If applying forcible power or strike (dropping or careless(1) For restarting after power off during normal
dealing), poor operation and noise may occur.Compressor Motor operation, plug the power cord after
5 min. for pressure balance of Refrigerating Cycle and
(3) Use proper electric components appropriate to the
PTC cooling.
Compressor.
(2) During normal operation of the Compressor Motor, PTC
(4) Note to Keep Compressor.
elements generate heat continuously. Therefore,
If Compressor gets wet in the rain and rust in the pin of
if PTC isn't cooled for a while after the power has been
Hermetic Terminal, the result may be poor operation
shut off, Motor can't operate again.
and poor contact may cause.
5) Relation of PTC-Starter and OLP
(5) Be careful that dust, humidity, and flux welding don't
inflow in the Compressor inside in replacing the(1) If the power is off during operation of Compressor and
Compressor. Dust, humidity, and flux due to weldingthe power is on before the PTC is cooled, (instant shut-
which inflows to Cylinder may cause lockage and noise.off within 2 min. or reconnect a power plug due to
misconnecting), the PTC isn't cooled and a resistance
value grows. As a result, current can't flow to the sub-
coil and the Motor can't operate and the OLP operates
2 PTC-STARTERby flowing over current in only in the main-coil.
1) Composition of PTC-Starter(2) While the OLP repeats on and off operation about 3-5
times, PTC is cooled and Compressor Motor performs
(1) PTC (Positive Temperature Coefficient) is a no-contact
normal operation.
semiconductor starting device which uses ceramic
material and this material consists of BaTiO3.If OLP doesn't operate when PTC is not cooled,
Compressor Motor is worn away and causes circuit-
(2) The higher the temperature is, the higher becomes the
short and fire. Therefore, use a properly fixed OLP
resistance value. These features are used as starting
without fail.
device for the Motor.
6) Note to Use PTC-Starter
2) Role of PTC-Starter
(1) Be careful not to allow over-voltage and over-current.
(1) PTC is attached to Hermetic Compressor used for
Refrigerator, Show Case and starts Motor.(2) No Strike
(2) Compressor for household refrigerator applies toDon't apply a forcible power or strike.
single-phase induction Motor.(3) Keep apart from any liquid.
For normal operation of the single-phase inductionIf liquid such as oil or water away enter the PTC,
motor, in the starting operation flows in both main coilPTC materials it may break due to insulation
and sub-coil. After the starting is over, the current inbreakdown of the material itself.
subcoil is cut off. The proper features of PTC play all(4) Don't change PTC at your convenience.
the above roles. So, PTC is used as a motor starting
Don't disassemble PTC and mold. If the exterior to the
device.
PTC-starter is damaged, resistance value is altered and
it may cause poor starting of the compressor motor
may cause.
(5) Use a properly fixed PTC.
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ACEC
