DOWNLOAD LG GR-462CVF Service Manual ↓ Size: 583.35 KB | Pages: 15 in PDF or view online for FREE

Model
GR-462CVF
Pages
15
Size
583.35 KB
Type
PDF
Document
Service Manual
Brand
Device
Refrigerator
File
gr-462cvf.zip
Date

LG GR-462CVF Service Manual ▷ View online

3
4
BK
COMP -
RESSOR
CAPACITOR  PART P.T.C STARTER
GN
(GN/YL)
OPTION PART
DOOR
S/W-R
DOOR
S/W-F
BK
BK
BK
BK
BK
BK
EARTH PART
YL
YL
PR
PR
YL
(LIVE)
(NEUTRAL)
BL
GY
BK
BN
BO
WH
WH
WH
WH
DEFROST TIMER
THERMOSTAT
EARTH PART
RD
RD
RD
BL
BL
RD
PK
BL
BL
BL
BL
BL
OVER  LOAD
PROTECTOR
LAMP-F
LAMP-R
FUSE-M(72 C
)
FAN  MOTOR
 F.I.R  LAMP
CAPACITOR
C.A SYSTEM
COOLING FAN MOTOR
L-CORD 
HEATER
TE-PLATE 
HEATER
POWER  SUPPLY
CORD
CAPACITOR-S
DEF-THERMO
CAPACITOR-R
6
5
2
3
1
4
2
S
C
M
T
WH : WHITE       BL  : BLUE          RD : RED           PK  : PINK           
BK : BLACK        BN : BROWN      PR : PURPLE     YL : YELL OW
BO : BRIGHT ORANGE                 GY : GRAY        GN : G REEN 
3854JD1025Q
OPTIONS CAN BE APPLIED BY THE REQUEST OF BUYERS.
THE PLUG TYPE, CAPACITORS, EARTH PART ON CIRCUIT DIAGRAM ARE 
SUBJECT TO CHANGE IN DIFFERENT LOCALITIES.
F.I.R LAMP'S CAPACITOR SPECIFICATION
      F.I.R
CAPACITOR
220V   ~   240V
100V   ~   127V
50Hz                   300VAC, 0.33uF
60Hz                   300VAC, 0.27uF
CIRCUIT DIAGRAM
M
M
C/F
00.04.06
97/133
4-1 COMPRESSOR
4-1-1 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.
4-1-2 Composition
The Compressor is Composed of Compressor Apparatus
compressing gas, Compressor Motor moving Compressor
Apparatus and Case protecting Compressor Apparatus
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 processing
precision components and is sealed after production in absence
of dust or humidity, deal and repair with care.
4-1-3 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.
4-2 PTC-STARTER
4-2-1 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 BaTiO
3
.
(2) The higher the temperature is, the higher becomes the
resistance value. These features are used as starting
device for the Motor.
4-2-2 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.
4-2-3 PTC-Applied Circuit Diagram
● 
According to Starting Method for the Motor
4-2-4 Motor Restarting and PTC Cooling
(1) For restarting after power off during normal
Compressor Motor operation, plug the power cord after
5 min. for pressure balance of Refrigerating Cycle and
PTC cooling.
(2) During normal operation of the Compressor Motor, PTC
elements generate heat continuously. Therefore, 
if PTC isn't cooled for a while after the power has been
shut off, Motor can't operate again.
4-2-5 Relation of PTC-Starter and OLP
(1) If the power is off during operation of Compressor and
the power is on before the PTC is cooled, (instant shut-
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
by flowing over current in only in the main-coil.
(2) While the OLP repeats on and off operation about 3-5
times, PTC is cooled and Compressor Motor performs
normal operation.
If OLP doesn't operate when PTC is not cooled,
Compressor Motor is worn away and causes circuit-
short and fire. Therefore, use a properly fixed OLP
without fail.
4-2-6 Note to Use PTC-Starter
(1) Be careful not to allow over-voltage and over-current.
(2) No Strike
Don't apply a forcible power or strike.
(3) Keep apart from any liquid.
If liquid such as oil or water away enter the PTC, 
PTC materials it may break due to insulation
breakdown of the material itself.
(4) Don't change PTC at your convenience.
Don't disassemble PTC and mold. If the exterior to the
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.
PTC STARTER
HERMETIC
TERMINAL
COMPRESSOR
MOTOR
C
M
S
M
3
6
5
S
PTC
OVERLOAD  PROTECTOR(O.L.P)
RSIR
Figure  20
4. ADJUSTMENT
- 8 -
4-3 OLP (OVER LOAD PROTECTOR)
4-3-1 Definition of OLP
(1) OLP (OVER LOAD PROTECTOR) is attached to the
Hermetic Compressor and protects the Motor by cutting
off current in Compressor Motor in case of over-rising
temperature by Bimetal in the OLP.
(2) When over-voltage flows to Compressor motor, the
Bimetal works by heating the heater inside the OLP, 
and the OLP protects Motor by cutting off current which
flows to the Compressor Motor.
4-3-2 Role of the OLP
(1) The OLP is attached to the Hermetic Compressor used
for the Refrigerator and Show Case and prevents the
Motor Coil from being started in the Compressor.
(2) Do not turn the Adjust Screw of the OLP in any way for
normal operation of the OLP.
(Composition and connection Diagram of OLP)
5. CIRCUIT DIAGRAM
CONTACTING
POINT
COVER
BIMETAL
CONTACTING
POINT
HEATER
TERMINALS
ADJUST
SCREW
HEATER
BIMETAL
Figure  21
NOTE : 1. This is a basic diagram and specifications vary in different localities.
2. F.I.R. lamp and capacitor are option parts.
- 9 -
3-1 DOOR
● 
Freezer Door
1. Remove the hinge cover by pulling it upwards. 
2. Loosen 4 hexagonal bolts fixing the upper hinge to the
body and lift the freezer door.
3. Loosen the screws inside the door gasket to remove the
door gasket and the door liner.
Refrigerator Door
1. Loosen 3 hexagonal bolts fixing the lower hinge to the
body  to remove the refrigerator door only.
2. Loosen the screws inside the door gasket to remove the
door liner and door gasket. 
3-2 DOOR SWITCH
1. To remove the door switch, pull out it with a 'Ñ' type
driver as shown in (figure  9).
2. Disconnect the lead wire from the switch.
3-3 THERMOSTAT
1. Remove all shelves placed in the Freezer.
2. Pull out the Thermostat Dial. (Figure 10)
3. Loosen 2 screws fixed to bottom of the Thermostat and
separate the Lead Wire.
4. Pull out the Thermostat.
3.4 FAN AND FAN MOTOR
1. After taking out the control box, remove the fan grill by
leaning the hook upwards with a 'Ñ' type driver and
pulling it out.
BOLT
HINGE
HINGE COVER
Figure  6
GASKET
DOOR LINER
Figure  7
LOWER HINGE
BOLT
Figure  8
DOOR SWITCH
LEAD WIRE
Figure  9
THERMOSTAT
CONTROL BOX
THERMOSTAT KNOB
SCREW
Figurev 10
HOOK
FAN GRILL
Figure  11
3. DISASSEMBLY
- 6 -
Page of 15
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LG GR-462CVF Service Manual ▷ Download

  • DOWNLOAD LG GR-462CVF Service Manual ↓ Size: 583.35 KB | Pages: 15 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the LG GR-462CVF in PDF for free, which will help you to disassemble, recover, fix and repair LG GR-462CVF Refrigerator. Information contained in LG GR-462CVF Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.