DOWNLOAD LG GR-392CVF Service Manual ↓ Size: 612.68 KB | Pages: 15 in PDF or view online for FREE

Model
GR-392CVF
Pages
15
Size
612.68 KB
Type
PDF
Document
Service Manual
Brand
Device
Refrigerator
File
gr-392cvf.zip
Date

LG GR-392CVF Service Manual ▷ View online

M
M
CIRCUIT DIAGRAM
YL
BK
BK
EARTH PART
BK
BN
BK
PK
BK
BO
WH
WH
WH
WH
YL
PR
PR
RD
RD
RD
BL
RD
BL
BL
BL
BL
BL
FUSE PART
OPTION PART
GN
(GN/YL)
EARTH PART
P.T.C STARTER
CAPACITOR PART
COMP-
RESSOR
DOOR
S/W-R
DOOR
S/W-F
LAMP
-R
LAMP
-F
THERMOSTAT
DEFROST TIMER
POWER SUPPLY
CORD
FAN MOTOR
FUSE-M(72
˚C)
CAPACITOR-R
CAPACITOR-S
OVER LOAD
PROTECTOR
DEF THERMO
F.I.R LAMP
C.A SYSTEM
GY
BK
BK
3
4
1
2
T
4
5
2
S
C
M
3
6
• FUSE  SPECIFICATION 
WH : WHITE
BK  : BLACK
BO  : BRIGHT ORANGE
BL  : BLUE
BN : BROWN
RD :RED
PR : PUPPLE
GY : GRAY
PK  : PINK
YL  : YELLOW
GN : GREEN
• OPTIONS CAN BE APPLIED
 BY THE REQUEST OF BUYERS.
• CAPACITORS, THE PLUG TYPE,
 EARTH PART ON CIRCUIT DIAGRAM
 ARE SUBJECT TO CHANGE IN
 DIFFERENT LOCALITIES.
NON FUSE
FUSE
100V~127V 200V~240V
250V 15A
250V 9A
3854JD1025P
99.03.02
97/133
M
CIRCUIT DIAGRAM
BK
BK
BN
BK
PK
BK
BO
WH
WH
WH
WH
PR
YL
WH
RD
RD
RD
BL
RD
BL
BL
BL
BL
FUSE PART
OPTION PART
GN
(GN/YL)
DOOR
S/W-F
DOOR
S/W-R
EARTH PART
P.T.C STARTER
CAPACITOR PART
COMP-
RESSOR
LAMP
-R
THERMOSTAT
DEFROST TIMER
POWER SUPPLY
CORD
FAN MOTOR
FUSE-M(72
˚C)
CAPACITOR-R
CAPACITOR-S
OVER LOAD
PROTECTOR
DEF THERMO
F.I.R 
LAMP
GY
BK
BK
3
4
1
2
T
4
5
2
S
C
M
3
6
• FUSE  SPECIFICATION 
WH : WHITE
BK  : BLACK
BO  : BRIGHT ORANGE
BL  : BLUE
BN : BROWN
RD :RED
PR : PUPPLE
GY : GRAY
PK  : PINK
YL  : YELLOW
GN : GREEN
• OPTIONS CAN BE APPLIED
 BY THE REQUEST OF BUYERS.
• CAPACITORS, THE PLUG TYPE,
 EARTH PART ON CIRCUIT DIAGRAM
 ARE SUBJECT TO CHANGE IN
 DIFFERENT LOCALITIES.
NON FUSE
FUSE
100V~127V 200V~240V
250V 15A
250V 9A
3854JD1025R
99.03.02
97/133
EARTH PART
4-1 COMPRESSOR
4-1-1 Role
The compressor inhales low temp. and low pressure gas
evaporated from Evaporator of the Refrigerator, and
condenses this gas to high temp. 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 in the
Compressor outside. On the other hand, because the
Compressor consists of 1/1000mm processing precision
components and is sealed after producing without dust or
humidity, deal and repair with care.
4-1-3 Note to Use
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, poor operation and poor contact may
cause.
5. Be careful that dust, humidity, and flux due to welding
don't inflow in Compressor inside in replacing
Compressor. Dust, humidity, and flux due to welding
which inflows to Cylinder may cause lock and noise.
4-2 PTC-STARTER
4-2-1 Composition of PTC-Starter
1. PTC (Positive Temperature Coefficient) is no-contact
semiconductor starting device which uses ceramic
material and the material consists of BaTiO
3
.
2. The higher the temperature is, the higher resistance
value becomes . These features are used as starting
device of 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 single
phase induction Motor.
For normal operation of single-phase induction motor, in
the starting operation flows in both main coil and sub
coil. After the starting is over, the current is cut off in sub
coil. The proper features of PTC play the above all roles.
So, PTC is used as a starting device of motor.
4-2-3 PTC-Applied Circuit Diagram
According to Starting Method of 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 Compressor Motor, PTC
elements generate heat continuously. Therefore, 
if PTC isn't cooled for a while after power off, Motor can't
operate again.
4-2-5 Relation of PTC-Starter and OLP
1. If power off during operation of Compressor and power
on before PTC is cooled, (instant shut-off within 2 min.
or reconnect a power plug due to misconnecting), 
PTC isn't cooled and a resistance value grows. As a
result, current can't flow to the sub-coil and Motor can't
operate and OLP operates by flowing over current in
only 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 proper fixed OLP without
fail.
4-2-6 Note to Use PTC-Starter
1. Be careful to 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 inflows into PTC, 
PTC materials may break due to insulation breakdown
of material itself.
4. Don't change PTC at your convenience.
Don't disassemble PTC and mold. If damaging to
outside of PTC-Starter, resistance value alters and poor
starting of compressor motor may cause.
5. Use a properly fixed PTC.
OVERLOAD PROTECTOR-
PTC-
5-
6-
C-
S-
M-
S-
M-
MOTOR-
HERMETIC-
TERMINAL-
PTC STARTER-
RSIR-
COMPRESSOR-
3-
Figure  18
4. ADJUSTMENT
- 8 -
4-3. OLP (OVER LOAD PROTECTOR)
4-3-1 Definition of OLP
4. OLP (OVER LOAD PROTECTOR) is attached to
Hermetic Compressor and protects Motor by cutting off
current in Compressor Motor by Bimetal in the OLP in
case of over-rising temperature.
2. When over voltage flows to Compressor motor, Bimetal
works by heating the heater inside OLP, 
and OLP protects Motor by cutting off current which
flows to Compressor Motor.
4-3-2 Role of OLP
1. OLP is attached to Hermetic Compressor used to
Refrigerator and Show Case and prevents Motor Coil
from being started in the Compressor.
2. Do not turn the Adjust Screw of OLP in any way for
normal operation of OLP.
(Composition and connection Diagram of OLP)
5. CIRCUIT DIAGRAM
CONTACTING-
POINT-
HEATER-
TERMINALS-
BIMETAL-
COVER-
CONTACTION-
POINT-
ADJUST-
SCREW-
BIMETAL-
HEATER-
Figure  19
NOTE : 1. This is a basic diagram and specifications vary in different localities.
- 9 -
3-1 DOOR
● 
Freezer Door
1. Remove the hinge cover by pulling it upwards
2. Loosen 3 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 4 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 the 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. Loosen 2 screws fixing the control box assembly to the
body.
2. Remove the thermostat knob and the thermostat from
the control box.
3-4 FAN AND FAN MOTOR
1. After taking out the control box, remove the grill fan by
leaning the hook upwards with a 'Ñ' type driver and
pulling it out.
BOLT
HINGE COVER
HINGE
Figure  6
GASKET
DOOR LINER
Figure  7
LOWER HINGE
BOLT
Figure  8
DOOR SWITCH
LEAD WIRE
Figure  9
THERMOSTAT
CONTROL BOX
THERMOSTAT
 KNOB
SCREW
Figure  10
HOOK
GRILL FAN
Figure  11
3. DISASSEMBLY
- 6 -
Page of 15
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LG GR-392CVF Service Manual ▷ Download

  • DOWNLOAD LG GR-392CVF Service Manual ↓ Size: 612.68 KB | Pages: 15 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the LG GR-392CVF in PDF for free, which will help you to disassemble, recover, fix and repair LG GR-392CVF Refrigerator. Information contained in LG GR-392CVF 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.