LG GC-B379S*CA, Service Manual

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1. COMPRESSOR
1
.
Role
The compressor intakes low temperature and low pressure gas
evaporated from Evaporator of the Refrigerator, and condenses this
gas to high temperature and high pressure gas, and then plays
delivering role to Condenser.
2
. Composition
The Compressor is Composed of Compressor Apparatus
compressing gas, Compressor Motor moving Compressor
Apparatus and Case protecting Compressor Apparatus and Motor.
There is Relay Assembly (one set of PTC-Starter and Over Load
Protector (OLP)) in Compressor. On the other hand, because the
Compressor consists of 1/1000mm processing precision
components and is sealed after production in absence of dust or
humidity, deal and repair with care.
3
.
Note for Usage
(1) Be careful not to allow over-voltage and over-current.
(2) No Strike If applying forcible power or strike (dropping or careless
dealing), poor operation and noise may occur.
(3) Use proper electric components appropriate to the Compressor.
(4) Note to Keep Compressor.
If Compressor gets wet in the rain and rust in the pin of
Hermetic Terminal, the result may be poor operation and poor
contact may cause.
(5) Be careful that dust, humidity, and flux welding don't inflow in the
Compressor inside in replacing the Compressor. Dust, humidity,
and flux due to welding which inflows to Cylinder may cause
lockage and noise.
2. PTC-STARTER
1. Composition of PTC-Starter
(1)
PTC (Positive Temperature Coefficient) is a no-contact
semiconductor starting device which uses ceramic
material and this material consists of
ВаТ iO з .
(2) The higher the temperature is, the higher becomes the
resistance value. These features are used as starting
device for the Motor.
2. Role of PTC-Starter
(1) PTC is attached to Hermetic Compressor used for
Refrigerator, Show Case and starts Motor.
(2) Compressor for household refrigerator applies to
single-phase induction Motor.
For normal operation of the single-phase induction motor, in
the starting operation flows in both main coil and sub-coil.
After the starting is over, the current in subcoil is cut off. The
proper features of PTC play all the above roles. So, PTC is used
as a motor starting device.
3. PTC-Applied Circuit Diagram
• According to Starting Method for the Motor
7. DISPLAY REMOVE
1. Insert the blade of a knife in the middle bottom of the
screen carefully.
2. Tilt the knife down until the display while latches do not come
out of the grooves.
3. Remove the display.
1 0
ADJUSTMENT DISASSEMBLY