DOWNLOAD LG GR-409GLPA-GLQA-GVPA-GVQA Service Manual ↓ Size: 205.4 KB | Pages: 8 in PDF or view online for FREE

Model
GR-409GLPA-GLQA-GVPA-GVQA
Pages
8
Size
205.4 KB
Type
PDF
Document
Service Manual
Brand
Device
Refrigerator
File
gr-409glpa-glqa-gvpa-gvqa.zip
Date

LG GR-409GLPA-GLQA-GVPA-GVQA Service Manual ▷ View online

ADJUSTMENT
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 Assy (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 BaTiO
3
.
(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
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.
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.
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
M
S
S
PTC
OVERLOAD 
PROTECTOR(O.L.P)
RSIR
RELAY ASSY
Figure  19
- 9 -
3 OLP (OVER LOAD PROTECTOR)
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.
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)
CIRCUIT DIAGRAM
CONTACTING
POINT
COVER
BIMETAL
CONTACTING
POINT
HEATER
TERMINALS
ADJUST
SCREW
HEATER
BIMETAL
Figure  20
NOTE : 1. This is a basic diagram and specifications vary in different localities.
- 10 -
C
N
L
3
6
5
2
S
BK
PK
RD
BL
BL
BL
BK
BL
CAPACITOR
PART
EARTH PART
COMPRESSOR
P.T.C
STARTER
RUNNING
BL
BL
BL
RD
GY
BL
BK
PR
GN/YL
POWER
SUPPLY
CORD
RT-SENSOR
YL
YL
BL
F-SENSOR
DOOR OPEN
PERCEPTION
DEF-SENSOR
BO
BO
BL
BL
GY
RD
1
2
3
4
5
6
GY PR BL YL
RD BN WHWH
BO
BK
GY
BN
SB
BK
OVERLOAD
PROTECTOR
STARTING
COOLING      
FAN MOTOR
DOOR SW-R
FUSE-M
( 72
˚C
)
L-CORD HEATER
SHEATH HEATER
R-LAMP
M
C
M
FAN MOTOR
PWB ASSY, MAIN
DISPLAY CONTROL P.W.B
DISPLAY CONTROL P.W.B
CIRCUIT DIAGRAM
1 2 3 4 5 6 7 8 9
• THE PLUG TYPE,
CAPACITOR PART,
COMPRESSOR EARTH
PART ON CIRCUIT
DIAGRAM ARE SUBJECT
TO CHANGE IN DIFFERENT
LOCALITIES AND ACCORDANCE
WITH MODEL TYPE
• WHEN STARTING CAPACITOR
IS NOT USED, NO.3,4 OF PTC
START IS CONNECTED
INTERNALLY
M
3854JD1026E
BK:BLACK
YL:YELLOW
SB:SKY BLUE
BN :BROWN
GN:GREEN
PK :PINK
RD:RED
BL :BLUE
GN/YL:GREEN/YELLOW
BO:BRIGHT ORANGE
PR:PURPLE
GY:GRAY
WH/BK:WHITE/BLACK
WH:WHITE
BL
YL
GY
BN
SB
BK
9
10
11
8 7 6 5 4 3 2 1
GY PR BL YL
RD BN WH WH
BO
1 2 3 4 5 6 7 8 9
B
A
B
A
3 OLP (OVER LOAD PROTECTOR)
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.
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)
CIRCUIT DIAGRAM
CONTACTING
POINT
COVER
BIMETAL
CONTACTING
POINT
HEATER
TERMINALS
ADJUST
SCREW
HEATER
BIMETAL
Figure  20
NOTE : 1. This is a basic diagram and specifications vary in different localities.
- 10 -
C
N
L
3
6
5
2
S
BK
PK
RD
BL
BL
BL
BK
BL
CAPACITOR
PART
EARTH PART
COMPRESSOR
P.T.C
STARTER
RUNNING
BL
BL
BL
RD
GY
BL
BK
PR
GN/YL
POWER
SUPPLY
CORD
RT-SENSOR
YL
YL
BL
F-SENSOR
DOOR OPEN
PERCEPTION
DEF-SENSOR
BO
BO
BL
BL
GY
RD
1
2
3
4
5
6
GY PR BL YL
RD BN WHWH
BO
BK
GY
BN
SB
BK
OVERLOAD
PROTECTOR
STARTING
COOLING      
FAN MOTOR
DOOR SW-R
FUSE-M
( 72
˚C
)
L-CORD HEATER
SHEATH HEATER
R-LAMP
M
C
M
FAN MOTOR
PWB ASSY, MAIN
DISPLAY CONTROL P.W.B
DISPLAY CONTROL P.W.B
CIRCUIT DIAGRAM
1 2 3 4 5 6 7 8 9
• THE PLUG TYPE,
CAPACITOR PART,
COMPRESSOR EARTH
PART ON CIRCUIT
DIAGRAM ARE SUBJECT
TO CHANGE IN DIFFERENT
LOCALITIES AND ACCORDANCE
WITH MODEL TYPE
• WHEN STARTING CAPACITOR
IS NOT USED, NO.3,4 OF PTC
START IS CONNECTED
INTERNALLY
M
3854JD1026E
BK:BLACK
YL:YELLOW
SB:SKY BLUE
BN :BROWN
GN:GREEN
PK :PINK
RD:RED
BL :BLUE
GN/YL:GREEN/YELLOW
BO:BRIGHT ORANGE
PR:PURPLE
GY:GRAY
WH/BK:WHITE/BLACK
WH:WHITE
BL
YL
GY
BN
SB
BK
9
10
11
8 7 6 5 4 3 2 1
GY PR BL YL
RD BN WH WH
BO
1 2 3 4 5 6 7 8 9
B
A
B
A
1 DOOR
● 
Freezer Door
1) Loosen 2 screws and pull the Lower Cover. 
2) Loosen hexagonal bolts fixing the lower hinge to the
body to remove the freezer door only.
3) Pull out the Door Gasket to remover from the 
Door Foam Assy, F.
Refrigerator Door
1) Loosen hexagonal bolts fixing the center hinge(Hinge,C)
to the body to remove the refrigerator door only.
2) Pull out the Door Gasket to remove from the 
Door Foam Assy, R.
2 DOOR SWITCH
1) Loosen four screws in upper part and disconnect top
cover.
2) Disconnect Lead Wire from switch.
3) Disengage hook behind the switch by pressing it with
hands.
3 REFRIGERATOR ROOM LAMP
1) Remove the Cover Lamp, R by pulling with a '–' type
driver.
2) Remove the Lamp by turning.
3) After removing the lamp, you must check 
the O-RING, which is made by rubber and prevent
electric spark, in the socket. 
Bolt
Lower Hinge
Figure  6
GASKET
Figure  7
Hinge, C
Bolt
Figure  8
Figure  9
DISASSEMBLY
- 7 -
Figure  10
Page of 8
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LG GR-409GLPA-GLQA-GVPA-GVQA Service Manual ▷ Download

  • DOWNLOAD LG GR-409GLPA-GLQA-GVPA-GVQA Service Manual ↓ Size: 205.4 KB | Pages: 8 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the LG GR-409GLPA-GLQA-GVPA-GVQA in PDF for free, which will help you to disassemble, recover, fix and repair LG GR-409GLPA-GLQA-GVPA-GVQA Refrigerator. Information contained in LG GR-409GLPA-GLQA-GVPA-GVQA 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.