LG GR-382R User manual

Safety Precautions.
Read the following inst ructions before servicing your refrigerator.
1. Unplug the refrigerator before
servicing.
2. Visually inspect for gas leakage or
short circuit.
3. If testing with the refrigerator
plugged in, wear rubber gloves to
avoid electric shock.
,
,
Do not touch frozen metal parts;
your hands could freeze to the
surface. This may cause frostbite.
Be sure that no water is dripping
towards electrical or metal parts.
,
,
,
If you check the bottom part of the
refrigerator while the freezer
door is open, be careful standing
up. You could bump your head.
When you tilt your refrigerator be
sure to take out all metal, glass, or
other loose parts.
When servicing the evaporator,
wear cotton gloves to prevent cutting
by any of the evaporator fins.

Service Precautions
Refrigerant Recharging
Test the compressor's operation before
recharging the refrigerant; this is very
important to detect failures and to
ensure the proper motor running, and
to identify failures immediately. If
failure has been detected, clean the
system from any other possible
R-134a residues by breaking the final
part of the compressor's service pipe
at it's thinnest part as shown in Fig. #1.
Replace the filter and any other part
that could be deteriorated. Unweld
and pull out the service pipe,
then place a new pipe extension with a
Hansen male connector and solder
the new pipe. See Fig. #2
POINTTO BE
BROKEN CHARGETUBE
EX?ENSiON
MALEHANiSEN
SERVICETUNEEXTENSION SOLDNRFNGPOINT
Figure 1i Fig;ute2
It is necessary to open the valve
when soldering to allow the gases to
escape without forcing the molten
solder out of the joint. The extension
with the male Hansen connector
should be connected to a female type
connector to the vacuum pump's pipe.
See Fig. #3
System air evacuation starts as soon
as the pump begins to run. The
system must be kept under vacuum
until the low pressure gauge shows
0(absolute or -1 atm, -760 mm Hg.) It
is not recommend to run the vacuum
pump for more than 30 minutes. See
Figure 3.
In case there is a large leak and the
vacuum operation must stop,
you must add a small amount of
refrigerant to the system and check
with an electronic leak detector. If a
soldering failure is detected, open the
valve before soldering to equalize the
pressure and keep solder from being
blown out of the joint or sucked into
the piping.
As soon as the repair is completed,
charge the correct amount of
refrigerant into the system.
Remember that each system requires
a specific amount of refrigerant with a
tolerance of +5 grams. See Figure 4.
TO THE b_ 134_ CYLliH_R
_3ySTE_ I_igur_ " 4
Before performing this operation (if
the vacuum pump and charging
cylinder are still attached to the
system) be sure the valve between
the pump and the cylinder is closed to

Service Precautions
keep refrigerant out of the system.
See Figure 5.
For gas charging, check the
graduated scale on the cylinder to see
the amount of refrigerant that it
contains and the amount that will be
pumped into the system. For
example, if you have 750 grams of
refrigerant in the cylinder and we
have to pump 165 grams to the
system, this amount will be reached
when the indicator reaches 585
grams; remember that the indicator
shows a lower level of meniscus.
installed in one session, as it could
block the compressor. Install 20-30
grams at a time and close the valve.
The compressor will run and the
pressure will drop. Then open the
valve and install other 20-30 grams
of refrigerant. Repeat this procedure
until the entire amount has been
added to the system. Under operating
conditions, the system pressure
should stabilize between 0.3 and 0.6
atm.
Do this after choosing the scale
corresponding to the gas pressure
indicated on the pressure indicator
located on the upper part of the
column. To let R-134a flow into the
system, open the valve at the
recharging cylinder's base. The total
amount of refrigerant should not be
FILING OR VALVE TO BE OPENED
CHARGE TUBE WHEN REEILUNG
"_---F ?"---_
TO THE REFRIGERATION TO THE CHARGE
SYSTEM CYLiNQER
VALVE TO BE CLOSED
AFTER VACUUM
TO THE VACUUM PUMP _ Figure 5

•
Specifications
General
Features
Freezer
Compartment
Refrigerator
Compartment
MODEL NAME
3apacityliters(cubic
eet) (C/R/r)
Dimentions(W*H*D)
Neight (pounds)
remperatureControl
3ontrolType
-landle Type
_eversible Door
DoorFinishing
_ower Cover
=.efdgerant (Amount)
3oolingsystem
Defrosting System
nsulation (Foam)
ce Bin Type
_lastic Shelves
GR-382R
99(3.5)/ 236(8.3)/
334(11.8)
26.5*65*27 in /
675"1650"685 mm
152
Electronic
Refrigerator-Control
Horizontal
YES
PCM
NO
R134a (4.94 Oz./ 140
gr.)
Indirect
Automatic (Resistance
in Evaporator)
Cyclopentane
LRTP-1231W
99(3.5)/ 236(8.3)/
334(11.8)
26.5*65*27 in /
675"1650"685 mm
152
Electronic
Refrigerator-Control
Horizontal
YES
PCM
NO
R134a (4.94 Oz./ 140
gr.)
Indirect
Automatic (Resistance
in Evaporator)
Cyclopentane
Twist Twist
1 1
3oor Baskets
.amp
3hiller
_helves
MultiAirFlow
_amp
-gg trays
3ottle Guides
-lumidity Control
MagicCrisper
_'egetableDrawer
3eodorizer
2
NO
YES
GLASS (2)
YES
YES
NO
NO
NO
YES
1
NO
2
NO
YES
GLASS
YES
YES
NO
NO
NO
YES
1
YES
(2)

Feature Chart
FREEZER
Temperature
Ice
Twist'n Serve
REFRIGERATOR
Temperature
Control_-
Fresh Meat
Tray...
Lamp_
Shelves
(Plastic or Glass) _"
Deodorizer
(Absorbs
Odors)*
Multi Air Flow _-.-----
Air flow distributor
Vegetable Tray
(Keeps fruitsand
vegetables fresh)
Freezer
Door Baskets
Refrigerator
Door Baskets
Leveling
Magic Crisper
(Vegetable Tray cover
that control humidity)
MODEL(S): GR-382R
LRTP1231W
* This part is only included in model LRTP1231W

2. Circuit Dia,qram
CIF_C 17 DIAORA
PWB ABSY, DISPLAY
__ R SENSOR
DEF SENSOR
IYI'2I_NWI_HIWI_°IS
PWB (PCB) ASSEMBLY,MAIN
POWER
SUPPLY
CORB
NEUTRAL
BL i[
?
_, pF
B[
p._¢ START
3854JLBOOlS
BK:BLACK BN:BROWN RD:RED BO:BRIGHT ORANGE
YL: YELLOW GN: GREEN BL: BLUE PR: PURPLE
WH:WHITE SB: SKY BLUE GY:GREY PK: PINK
MODEL(S): GR-382R
LRTP1231W

Graphic Circuit Diaqram
F+ +.....................................................................................................................i
+i .........................................................................................................._ i i
11 1,+++
i i Sensor _ Bke /
i i Delro_t Resislanee i[L_ /
i i (Heater Cord) _t)range
i i ran >e
i i Evaporator [
i i [Red
i i O,.+ro+tRe+m.....
+ + (Heater Plate)
L.........J_wm++ ............._ ..................................
S++ildl MI IJ._--
L-L.........Y.._J].__,,_;..........._...... ...........................................,
+ + ++i+
+ + i+_
i i Control i,
Sen_or
i i L"°+IC_:
i i iil
i i %"_!
i i !
/t
: : ! $
i i g
: : i l
]/
: : z:
i l
: : l ]
l
i;
ig
i ................................................................................ /
Blue
Blue
-_=
Defrost and
Temperature
Electronic Control
Pink
B]__e RtlnnhlgCapacitor
White Pink
Black
-_ AC Current

3. Product Disassemble.
Doors
• Freezer Door
1. Remove hinge cover by pulling it
upwards.
2. Loosen the hexagonal bolts that
hold the upper hinge in place. See
Figure 1.
3. Remove door. See Figure 2.
Figure 1 Figure 2
4. Pull gasket to remove it. See
Figures 3 and 4.
Figure 3 Figure 4
2. Disconnect all switche's cables.
See Figure 8
Figure 7 Figure 8
Control Circuit ( Display PWB)
1. Remove the lamp cover by
inserting a screwdriver in the lower
side's holes. See Figure 9.
2. Loosen and remove the 2 screws.
See Figure 10.
•Refrigerator Door.
1. Loosen the hexagonal bolts that
hold the central hinge in place.
See Figure 5.
2. Remove refrigerator door. See
Figure 6.
3. Pull out the gasket to remove it
from the door. See Figure 4 from
Freezer door.
Figure 9 Figure 10
3. Pull out the Control Box. See
Figure 11.
4. Disconnect the connector from the
cable terminal. See Figure 12.
5. Remove the EPS Multi air duct
(insulation) from the control box.
6. Detach the electronic control
(Display, PWB). See Figure 13.
Figure 5 Figure 6
Door Switch
1. Pull out the door switch out using
aflat head screwdriver. See
Figure 7
Figure 11 Figure 12

Figure13
Fan and Fan Motor.
1. Remove freezer shelf.
3. Remove the ice bin assembly by
pulling it to the right side, until it
snaps out.
4. Remove Grill Fan screw cover.
See Figure 14.
5. Loosen the screw. See Figure 15.
6. Pull out the fan cover. Figure 16.
Defrost Control Assembly
1. The defrost control assembly
consists of one thermistor and a
fuse that melts with heat.
2. The termistor's function is to
sense the compartment's
temperature and automatically
stop the defrost. The termistor is
located beside of the evaporator
bracket.
3. The melting fuse is a safety device
to prevent an overheating of the
defrosting resistance when it
operates.
4. The fuse melts at 162 ° F and the
resistance heater stops.
5. To replace this components,
please follow the steps mentioned
at Figure 18.
Figure 14 Figure 15
6. Unplug the connector.
7. Remove the fan holder shroud.
Figure 17.
8. Remove fan and loosen both
screws that hold the bracket.
9. Remove the motor bracket and the
rubber parts. Pull out the fan
motor. See Figure 17.
Figure 16 Figure 17
LFigure 18. Unplug the connector plugged to
the defrost control assembly and replace it if
necessary.
Lamp.
Refrigerator Compartment Lamp
1. Remove the lamp cover with
a screwdriver or a similar tool.
See Figure 19.
2. Remove the lamp by unscrewing it
counterclockwise and replace it
with the same specifications
(125V,20W). Part Number
6912JB2002J.

Figure 19
Refrigerator Control Box.
Remove the lamp cover as mentioned
before.
1. Loosen the screws.
2. Remove the entire control box.
See Figure 20.
3. Disconnect the control box
connector. See Figure 21.
Figure 20 Figure 21

4. Reversible Door
PRECAUTION
1. Before reversing the doors, remove all foods and accesories,
like shelves or trays, which are not attached to the doors.
2. Use a Philips screwdriver, bolt driver, torque wrench, or spanner to
tighten and loosen the bolt.
3. Be careful not to drop the refrigerator or door when assembling or
disassembling lower hinge or the Adjustable ScrewAssembly.
4. Don't lay the refrigerator down to work on it. It will cause
malfunction.
5. The doors may be reversed to provide left or right opening, depending upon the customer's
preference.
HOW TO REPLACE THE DOOR OPENING LEFT TO RIGHT
(when converting from left-opening to right opening)
Remove theeap_: and upper hinge #_ Remove the Freezer Door _,,_
Remove the center hinge £;,;and the
Refrigerator Door _'i Remove the lower hinge £Z

5 Reversethepositio_o{theadjus_abme _ Assemblethelowerhi_g÷_z
screw_ssemb{y_[i Q
@
8M_ve the _p t_ th÷ opposite side _ad
assemble the center hinge
@
I¸o
1Revel'se the pi_ i_sitiol_ of lhe up}_l"
hlr_ge

6. Troubleshooting
6-1 COMPRESSOR AND ELECTRIC COMPONENTS
I_! Power Source. .-), Remove the PTC-Starter "_1 (Rating Voltage I
from the Compressor I 10%) I
and measure the voltage
between Terminal C of
Compressor and
Terminals 5 or 6 of PTC.
| Applied voltage is not I I Consult a qualified I
--I the range of Rating _ electrician. I
rChsietka hce°fL aCheCkgthece_-'_canC_M-S IYES
Motor I rl in Motor Compressor. I NO i I
I Compressor. /I _Replace I . I ..... I
|
Check the Check the resistance of |
resistance of two terminals in PTC- I
1__ Starter.
Jeotostep4 I
J Replacce I
_-I PTC-Starter.
CheckOLP. I _ I Check if applyinga / |
OLP works within 30 | YES
seconds In forcible I
OLP operation by
turning against power = _, D_,_^^,_,,_,| NO [ -- I
on and off. I--_1 r'_'_'_ _"-r'" I
?
NO
[_>1 Check II MeasoreminimumstartingI I Compooeotsstartin IYESr ,
s OK
Itartingstate. _ voltageafter5min, for _ the voltage of Rating _ • • I
I I I balancing cycle pressure I'1 Voltage 10% below. I
L_I I andc°°IingthePTC H I r-G°t°stepl I
NO I I

6-2 PTC AND OLP
Separates the PT
from Compressor and
measure the
resistance between
No. 5 and 6 (only
RSIR Type) or No. 4
and 5 of PTC with a
Tes ter or Wheatstone
Bddge (Figure 22).
Separate the OLP
from Compressor and
check resistance value
between two terminals
of OLP with a Tester.
(Figure 23).
| 2o%%%_o72_ue_0°JoI I Chec.theother I
--_ 115V/6OHz: 6.8 30% _ electric components.
/ 240vJsoHz:33 30% I I I
The Resistance value
is Oor several
hundreds
The vatue is ?
Figure 23

6-3 OTHER ELECTRIC COMPONENTS
• No Cooling
Compressor Ir_kl Check if current flows to
__'_€ _ components.
I
Running state of
a. Starting Devices _ Shorted or Broken
b. OLP • Poor contact or shorted.
c. Compressor coil 9 Coil Shorted.
d. Circuit Parts ---_ Poor contact or shorted.
. f,Ch:s kt fsi: ,er
Check current
-_1 flowing in sub-coil
._1 Check capacity of
Check starting _ Low Voltage
|Poor contacting I
Rep,aceeachI
IReplace the I
-_1defective I
I Zheitems I I Comoreso," I--I Rap,acetheI
r S
--_ described above _ Motor Coil I-*1 Compressor. I
Fan Motor doesn't • I Checker current i_IPoor contact | ,.I Replacethe ]
run. F flow of thedoo__,, r defective .
Much frost is on the Check current flow Shorted Replace PTC.
evaporator, of the following
components:
DefrostControl
Check current flow
of the following • I
components: Replace PTC.
L-CORD, TE-PLATE
HEATER.

6-4 SERVICE DIAGNOSIS CHART
COMPLAINT
No Cooling
Poor Cooling
Poor Freezing
Food in the refrigerator
is frozen
Moisture or ice forms in
the chamber of the set.
Moisture forms on the
outside
Abnormal Noise
Door doesn't close well.
Ice and food smell
unpleasent
POINTS TO BE CHECKED
1. Is the power cord unplugged?
2. Check if the power switch is set to OFF.
3. Check if the fuse of power switch is
shorted.
4. Measure the voltage of power outlet.
1. Check if the refrigerator is placed close
to a wall.
2. Check if the refrigerator is placed close
to a stove, oven or in indirect sunlight.
3. Is the ambient temperature high or the
room door closed?
4. Check if putting in hot food.
5. Did you open the refrigerator door too
often?
1. Is the ambient temperature too low?
10 C (40 F).
3. Is food buckling the cooling air outlet?
4. Check if the PWB is set to MAX.
7. Is watery food kept?
8. Check if putting in hot food.
9. Did you open the refrigerator door too
often?
13. Check if ambient temperature and
humidity are high.
14. Is there a gap in the door gasket?
18. Is the refrigerator positioned in a firm
and even place?
lg. Is something in the way behind the
refrigerator?
20. Check if the evaporating tray cover is
left off.
21. Check if the cover of mechanical room
in below and front sides is taken out.
26. Check if the door gasket area has
become dirty or contaminated.
27. Is the refrigerator placed in a firm and
even place?
28. Is too much food put in the refrigerator?
32. Check if the inside of the refrigerator
becomes dirty.
33. Did you keep fragrant foods without
wrapping?
34. It smells plastic.
REMEDY
Plug it to the outlet.
Set the switch to ON.
Replace a regular fuse.
If the voltage is low, check the wiring or
call an electrician.
Place the set with the space of about 10
cm.
Place the set apart from these heat
sources.
Is the ambient temeperature within spec?
(above 10 C er40 F)
Put food in after it cools.
Don't open the door too often and close it
firmly.
2. To make the freezer colder, set the COLD
AIR CONTROL to 7 and set the R control
button (PWB) to MAX.
5. Place food in high temperature section
(Front Part).
6. Set the button to MID.
10. Seal watery food with vinyl wrap.
11. Put food after it cools.
12. Don't open the door too often and close it
firmly.
15. Wipe moisture with a dry cloth.
16. This does not occur if the temperature
and humidity are in the normal range.
17. Fixthega p.
22. Adjust the leveling screws. Position the
refrigerator properly.
23. Remove the objects.
24. Replace the tray.
25. Replace the cover.
29. Clean the door gasket.
30. Position the refrigerator in a firm place
and adjust the leveling screws.
31. Keep food from reaching to the door.
35. Clean the inside of the refrigerator.
36. Wrap fragrant food.
37. The new refrigerator smells of plastic, but
the odor will dissipate after a couple of
weeks.
•In addition to the items described above, refer to the following to solve the complaint.
Check if frost forms
in the Freezer. Replace the
componets of the
Check Refrigerating
Cycle.

6-5 REFRIGERATING CYCLE
Troubleshooting Chart
CAUSE
t-
rll
>
>
O
m
PARTIAL
LEAKAGE
WHOLE
LEAKAGE
©
m PARTIAL
_ CLOG
WHOLE
_o
-< CLOG
©
Ou
_rn
-o-n
;;0111
rnO
03--4
orn
Z
MOISTURE
CLOG
COMPRESSION
CO
COMPRESSION
REFRIGERAT
CONDITION
Freezer and
Refrigerator don't
get cold normally.
Freezer and
Refrigerator don't
get cold at all.
Freezer and
Refrigerator don't
get cold normally.
Freezer and
Refrigerator don't
get cold at all.
Cooling operation
stops periodically.
Freezer and
refrigerator don't get
cold.
No compressing
operation.
EVAPORATOR
CONDITION
Low flowing sound of
refrigerator is heard
and frost forms in inlet
only.
Flowing sound of
refrigerant is not heard
and frost isn't formed.
Flowing sound of
refrigerant is heard and
frost forms in inlet only.
Flowing sound of
refrigerant is not heard
and frost isn't formed.
Flowing sound of
refrigerant is not heard
and frost melts.
Low flowing sound of
refrigerant is heard and
frost forms in inlet only.
Flowing sound of
refrigerant is not heard
and no frost.
TEMPERATURE
OF THE
COMPRESSOR
A little higher than
ambient temperature,
Equal to ambient
temperature.
A little higher than
ambient temperature
Equal to ambient
temperature.
Lower than ambient
temperature.
A little higher than
ambient temperature.
Equal to ambient
temperature.
REMARKS
1. A little refrigerator
has leaked.
2. Refrigerator runs
normally if you
recharge it.
3. No discharging of
refrigerant.
4. Refrigerator runs
normally if yoy
recharge it.
5. Normal discharginf
of refrigerant.
6. The capillary tube
is faulty.
7. Normal discharging
of refrigerant.
8. Cooling operation
restarts when
heating the inlet of
capillary tube,
9. Low pressure on
high side.
No pressure of
high pressure side
in compressor.
Leakage Detection
Check for aleak which ma_
Check if
Compressor runs.
ormal fo_med frost¸
be in the oil discharge in the compressor or in the evaporator.
YES -_t Check if frost forms I
on the evaporator, liNl°el'°nSl[ O#forms in
I
ormal amount¸
Faulty Compressor I
Ucck for oiHeaks.
Recharge refrigerant to
I compressor and check
Check Compressor
YES
S_ight f_osl fo_ms on
Evapo_aton (Locate and _epa_ _he _eak)

7. MICOM Function & Circuit
7-1 FUNCTION
7-1-1 FUNCTION
1. When the appliance is plugged in, it is set to Medium. Each time the button is pushed, it cycles
through Medium----_ Medium/High -->4--ligh .--->.Low ----_Medium/Low -_-_Medium.
2. When the power is initially applied or restored after a power failure it is automatically set to
Medium.
Temperature Low
Control Medium Low Medium
37.4 (3)
Medium
Hi_lh
TEMP F (C) 46.4 (8) 39.2 (4) 34.7 (1.5)
ROOM REFRIGERATOR
High
30.2 (-1)

7-1-2 DEFROSTING
1. The defrosting is performed each time when the total running time of the
compressor reaches 10 hours.
2. After the power is turned on (or restored after a power failure), the defrosting
starts when the total running time of the compressor reaches 4 hours.
3. When the temperature of the defrosting sensor reaches (13 C) 55.4 F or above, the
defrosting stops. If the temperature does not reach (13 C) 55.4 F in 2 hours after the
defrosting starts, the defrosting error code is displayed. (Refer to 7-1-4 Error
Diagnostic Mode).
4. With the defective defrosting sensor (cut or short-circuited wire), the defrosting
will not be performed.
7-1-3 SEQUENTIAL OPERATION OF ELECTRIC COMPONENTS
The electric components, such as the compressor, defrosting heater, and cooling
fan, starts sequentially to avoid noise and damage to the part which may result
from the simultaneous start of various components on turning the power on or after
the completion of a test.
"o
£-
c_
O
Conditionof Operation Operating Sequence
Ifthe temp of the defrostiilg
sensor is25 _Cor above
(Forthe i_itial useafter the
purchase orgrounding)
If the temp of the defrosting
sensor is bebow 25 _C
(After a power failure or SVC)
POWER in0.5sen COMP & COOLING FAN
ON ]= ON
POWER in05 see DEFROSTING i_110sec DEFROSTING
ON _= HEATER ON "P"HEATER OFF
in0.5sec COMP & COOLING FAN
"_ ON

7-1-4 ERROR DIAGNOSTIC MODE
1. The error diagnostic mode indicates when a fault may affect the performance of
the product occurs while operating the product.
2. Even if a function control button is pushed when an error occurs, the function
will not be performed.
3. When the error is cleared while the error code is displayed due to a fault, the
refrigerator returns to the normal condition (Reset).
4. The error code is displayed by the refrigerator temperature indication LED on
the display of the refrigerator while the remaining LEDs are off.
R1 R2 R3 R4
_r)- :ON _:OFF @:NORMAL
EnorCode Display
RI R2 R3 R4
Sta_eofOperationwithE_or
NO En_r Cause CompICoolingfan
Faulty r_.frigerato_(R) • _1 • Cut or short-circuited wire of 15rainON/ ,..
I. sensor!on the coatro_ • refdgeratol sensor 15rn_ OFF
"T
box ofthe _dr_era_or)
2, Fau_ydd_lJrzjsem_r • •_-) • Cut or short-drcuited wire of O Nodefrosting
Tdefrosting sensor
Cut or disconnected wire of
3, Defrostingfai_ure defrosting heater or temperature O ©
fuse(indicated at least 4 hours
Inter after the error occurs)