LG GR-T622DE Service Manual ▷ View online
R
S
C
3
6
5
4
2
3
1
2
4
T
C/F
M
3854JD1033C
SWITCH NO
SW1
OFF
ON
OFF
ON
OFF
ON
OFF
ON
SW2
OFF
OFF
ON
ON
OFF
OFF
ON
ON
SW3
OFF
OFF
OFF
OFF
ON
ON
ON
ON
WATER SUPPLYING
TIME CONTROL OPTION
TIME CONTROL OPTION
TIME
10.5 SEC
9 SEC
10 SEC
11 SEC
12 SEC
13 SEC
14 SEC
15 SEC
CAUTION : Please unplug the
power cord from the wall outlet.
CIRCUIT DIAGRAM
WH
BK
BO
BK
BO
WHITE
BLACK
BRIGHT ORANGE
BLACK
BRIGHT ORANGE
:
:
:
:
:
BL
BN
GY
BN
GY
BLUE
BROWN
GRAY
BROWN
GRAY
:
:
:
:
:
RD
PR
GN
PR
GN
RED
PURPLE
GREEN
PURPLE
GREEN
:
:
:
:
:
PK
YL
YL
PINK
YELLOW
YELLOW
:
:
:
HALL
IC
YL
YL
YL
GY
GN/YL
GN/
YL
YL
BK
ICE MAKER OPTION PART
PWB ASSY, MAIN
CON3
4
3
2
1
3
2
1
SB
PK
RD
PR
PK
RD
PR
CON2
8
7
6
5
4
3
2
1
7
6
5
4
3
2
1
RD
WH
BN
WH
BN
YL
BL
BK
BL
BK
GY
BY
BY
CON1
5
4
3
2
1
4
3
2
1
BL
YL
BO
ICE MAKER
TEST S/W
TEST S/W
ICE MAKER
MOTOR
ICE MAKER
TEST S/W
SOLENOID,
ICE VALVE
DOOR
SW-R
GN
(GN/YL)
(GN/YL)
EARTH PART
EARTH PART
PR
POWER SUPPLY
CORD
BL
FAN MOTOR
COOLING-FAN
MOTOR
BL
BL
BL BL
WH
RD
BK
BK
BN
BN
THERMOSTAT
DEFROST,TIMER
BO
WH
FUSE-M(72
˚
C)
WH
WH
BK
BK
BL
BK
BK
EARTH PART
P.T.C STARTER
CAPACITOR PART
CAPACITOR-R
CAPACITOR-S
PK
RD
COMPRESSOR
OVER LOAD PROTECTOR
HEATER,SHEATH
DEF-THERMO
LAMP-R
ICE MAKER KIT
BL
WATER SUPPLYING
TIMER CONTROL S/W
TIMER CONTROL S/W
M
SWITCH
ON
ON
SWITCH
OFF
OFF
ON
1
2
3
SW1 SW2 SW3
R
S
C
3
6
5
4
2
3
1
2
4
T
C/F
M
3854JD1033B
WATER SUPPLYING
TIME CONTROL OPTION
TIME CONTROL OPTION
CAUTION : Please unplug the
power cord from the wall outlet.
CIRCUIT DIAGRAM
WH
BK
BO
BK
BO
WHITE
BLACK
BRIGHT ORANGE
BLACK
BRIGHT ORANGE
:
:
:
:
:
BL
BN
GY
BN
GY
BLUE
BROWN
GRAY
BROWN
GRAY
:
:
:
:
:
RD
PR
GN
PR
GN
RED
PURPLE
GREEN
PURPLE
GREEN
:
:
:
:
:
PK
YL
YL
PINK
YELLOW
YELLOW
:
:
:
*
CAPACITORS, THE PLUG TYPE, EARTH PART AND ICE MAKER OPTION PART ON CIRCUIT DIAGRAM
ARE SUBJECT TO CHANGE IN DIFFERENT LOCALITIES.
ARE SUBJECT TO CHANGE IN DIFFERENT LOCALITIES.
*
CAPACITORS, THE PLUG TYPE, EARTH PART AND ICE MAKER OPTION PART ON CIRCUIT DIAGRAM
ARE SUBJECT TO CHANGE IN DIFFERENT LOCALITIES.
ARE SUBJECT TO CHANGE IN DIFFERENT LOCALITIES.
HALL
IC
YL
YL
YL
GY
BK
ICE MAKER OPTION PART
PWB ASSY, MAIN
CON3
4
3
2
1
3
2
1
SB
PK
RD
PR
PK
RD
PR
CON2
8
7
6
5
4
3
2
1
7
6
5
4
3
2
1
RD
WH
BN
WH
BN
YL
BL
BK
BL
BK
GY
BY
BY
CON1
5
4
3
2
1
4
3
2
1
BL
YL
BO
ICE MAKER
TEST S/W
TEST S/W
ICE MAKER
MOTOR
ICE MAKER
TEST S/W
SOLENOID,
ICE VALVE
DOOR
SW-R
GN
(GN/YL)
(GN/YL)
PR
POWER SUPPLY
CORD
BL
FAN MOTOR
COOLING-FAN
MOTOR
BL
BL
BL BL
WH
RD
BN
BN
BN
THERMOSTAT
DEFROST,TIMER
BO
WH
WH
WH
BK
BK
BL
BK
BK
EARTH PART
P.T.C STARTER
CAPACITOR PART
CAPACITOR-R
CAPACITOR-S
PK
RD
COMPRESSOR
OVER LOAD PROTECTOR
HEATER,SHEATH
DEF-THERMO
LAMP-R
ICE MAKER KIT
BL
WATER SUPPLYING
TIMER CONTROL S/W
TIMER CONTROL S/W
M
2000.05.20 160/120
2000.05.20 160/120
FUSE-M(72
˚
C)
EARTH PART
GN/YL
GN/
YL
YL
EARTH PART
BK
BK
SWITCH NO
SW1
OFF
ON
OFF
ON
OFF
ON
OFF
ON
SW2
OFF
OFF
ON
ON
OFF
OFF
ON
ON
SW3
OFF
OFF
OFF
OFF
ON
ON
ON
ON
TIME
10.5 SEC
9 SEC
10 SEC
11 SEC
12 SEC
13 SEC
14 SEC
15 SEC
SWITCH
ON
ON
SWITCH
OFF
OFF
ON
1
2
3
SW1 SW2 SW3
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.
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.
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
(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.
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.
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.
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
(1) PTC (Positive Temperature Coefficient) is a no-contact
semiconductor starting device which uses ceramic
material and this material consists of BaTiO
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.
device for the Motor.
4-2-2 Role of PTC-Starter
(1) PTC is attached to Hermetic Compressor used for
(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.
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
(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.
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.
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
(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.
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.
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
(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.
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.
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.
4. ADJUSTMENT
- 8 -
PTC STARTER
HERMETIC
TERMINAL
COMPRESSOR
MOTOR
MOTOR
C
M
S
M
3
6
5
S
PTC
OVERLOAD PROTECTOR(O.L.P)
RSIR
Figure 19
4-3 OLP (OVER LOAD PROTECTOR)
4-3-1 Definition of OLP
(1) OLP (OVER LOAD PROTECTOR) is attached to the
(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.
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.
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
(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.
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)
(Composition and connection Diagram of OLP)
- 9 -
5. CIRCUIT DIAGRAM
CONTACTING
POINT
POINT
COVER
BIMETAL
CONTACTING
POINT
POINT
HEATER
TERMINALS
ADJUST
SCREW
SCREW
HEATER
BIMETAL
NOTE : 1. This is a basic diagram and specifications vary in different localities.
Figure 21
R
S
C
3
6
5
4
2
3
1
2
4
T
C/F
M
3854JD1033C
SWITCH NO(SW1)
1
OFF
ON
OFF
ON
OFF
ON
OFF
ON
2
OFF
OFF
ON
ON
OFF
OFF
ON
ON
3
OFF
OFF
OFF
OFF
ON
ON
ON
ON
WATER SUPPLYING
TIME CONTROL OPTION
TIME CONTROL OPTION
WATER
SUPPLYING
TIME
15SEC
11SEC
12SEC
13SEC
14SEC
16SEC
17SEC
18SEC
CAUTION : Please unplug the
power cord from the wall outlet.
CIRCUIT DIAGRAM
WH
BK
BO
BK
BO
WHITE
BLACK
BRIGHT ORANGE
BLACK
BRIGHT ORANGE
:
:
:
:
:
BL
BN
GY
BN
GY
BLUE
BROWN
GRAY
BROWN
GRAY
:
:
:
:
:
RD
PR
GN
PR
GN
RED
PURPLE
GREEN
PURPLE
GREEN
:
:
:
:
:
PK
YL
YL
PINK
YELLOW
YELLOW
:
:
:
HALL
IC
YL
YL
YL
GY
GN/YL
GN/
YL
YL
BK
ICE MAKER OPTION PART
PWB ASSY, MAIN
CON3
4
3
2
1
3
2
1
SB
PK
RD
PR
PK
RD
PR
CON2
8
7
6
5
4
3
2
1
7
6
5
4
3
2
1
RD
WH
BN
WH
BN
YL
BL
BK
BL
BK
GY
BY
BY
CON1
5
4
3
2
1
4
3
2
1
BL
YL
BO
ICE MAKER
TEST S/W
TEST S/W
ICE MAKER
MOTOR
ICE MAKER
TEST S/W
SOLENOID,
ICE VALVE
DOOR
SW-R
GN
(GN/YL)
EARTH PART
EARTH PART
PR
POWER SUPPLY
CORD
BL
FAN MOTOR
COOLING-FAN
MOTOR
BL
BL
BL BL
WH
RD
BK
BK
BN
BN
THERMOSTAT
DEFROST,TIMER
BO
WH
FUSE-M(72
˚
C)
WH
WH
BK
BK
BL
BK
BK
EARTH PART
P.T.C STARTER
CAPACITOR PART
CAPACITOR-R
CAPACITOR-S
PK
RD
COMPRESSOR
OVER LOAD PROTECTOR
HEATER,SHEATH
DEF-THERMO
LAMP-R
ICE MAKER KIT
BL
WATER SUPPLYING
TIMER CONTROL S/W
TIMER CONTROL S/W
M
SWITCH
ON
ON
SWITCH
OFF
OFF
ON
1
2
3
*
CAPACITORS, THE PLUG TYPE, EARTH PART AND ICE MAKER OPTION PART ON CIRCUIT DIAGRAM
ARE SUBJECT TO CHANGE IN DIFFERENT LOCALITIES.
ARE SUBJECT TO CHANGE IN DIFFERENT LOCALITIES.
3-1 DOOR
●
Freezer Door
1. Remove the hinge cover by pulling it upwards.
2. Loosen hexagonal bolts fixing the upper hinge to the
2. Loosen hexagonal bolts fixing the upper hinge to the
body and lift the freezer door.
3. Pull out the door gasket to remove from the door foam
Ass'y.
●
Refrigerator Door
1. Loosen hexagonal bolts fixing the lower hinge to the
body to remove the refrigerator door only.
2. Pull out the door gasket to remove from the door foam
Ass'y.
3-2 DOOR SWITCH
1. To remove the door switch, pull out it with a '–' type
driver as shown in (figure 9).
2. Disconnect the lead wire from the switch.
3-3 THERMOSTAT
1. Remove Control Box-R by loosening 2 screw fixed to ceiling
of Refrigerator compartment (Figure 10)
2. Separate the thermostat and dial knob F.
3. Remove the thermostat by disconnecting the lead wire.
3. Remove the thermostat by disconnecting the lead wire.
3. DISASSEMBLY
- 6 -
BOLT
HINGE
HINGE COVER
Figure 6
GASKET
Figure 7
LOWER HINGE
BOLT
Figure 8
DOOR SWITCH
LEAD WIRE
Figure 9
Figure 10