LG LRSPC2331NI Refrigerator Owner's Manual

PARTS IDENTIFICATION
3. Ref No. : GR-L247ER,
GR-L207ER
Cover Hinge
Cover PWB
"\
Frame Displa
Water Tube
I¢
Dispenser
Button
I'-'=
Freezer
Compartment
Refrigerator
Compartment
Shelf
ice maker
(optional)
Lam
I Box
Shelf.
(Steel,
T/Glass)
Guide bottle
Shelf
Drawer or Shelf
(optional)
Door rack
drawer/Meat
LowerCover
Conversion
Switch
(MeatsNegetables)
-14-
Humidity Switch
drawer
HOW TO INSTALL REFRIGERATOR
!. How to Adjust
Door Height of Refrigerator
• Make the refrigerator level first. (If the refrigerator is not installed on the flat floor, the height of freezer and refrigerator
door may not be the same.)
1. If the height of freezer
refrigerator
dOOr is lower than that of
compartment
Insert a ddver _
into the groove _
refrigerator
of adjusting screw
and rotate driver in arrow direction (clockwise)
refrigerator
becomes
2. If the height of freezer door is higher than that of
:
compartment
Insert a driver _
until the
:
into the groove _
of adjusting screw
and rotate driver in arrow direction (clockwise)
horizontal.
refrigerator
-18-
becomes horizontal.
until the
HOW TO INSTALL REFRIGERATOR
2. How
to Install
Water
Pipe
2-1. When connecting
• Before Installation
directly to the water tap.
• Please confirm the following
installation
parts.
1. The icemaker requires the water pressure of 1.5 8.5kgf/cm 2. (It is acceptable if city water fills a cup of
180cc with water for 3 seconds)
2. Install booster pump where the city water pressure is
below 1.5kgf/cm2 for normal operation of water and ice
dispenser.
Valve Feed
3. The total length of water pipe shall be less than 12m. Do
Rubber, Packing
Connector.
Pipe
not bend the pipe at right angle. If the length is more
than 12m, there will be troubles
on water sepply due to
water pressure drop.
4. Please install water pipe where there is no heat around.
(_
Co_nnector,
Pipe
Tape, Teflon
Class.
Shape and Spec.
Convertible
i Water
Valve
Nomenclature
Valve Feed
Water
Connector
Connector, (MECH) Pipe
PINe
5221JA3001A
Connector,(MECH) Pipe
ConversionConnector(3/4")
BalanceCon_%lor(3/4")
Packing(e24x3t)
4932JA3003A
6631JA3004A
6631JA3004B
3920JA3001B
4932JA3003B
ConversionConnectorON25)
BalanceConectoor(W25)
Packing(o23x3t)
6631JA3004C
6631JA3004D
3920JA3001A
Connector,(MECH) Pipe
ConversionConnector(W28)
Balance Conector(W28)
Pesking(o26x3t)
4932JA3003C
6631JA3004E
6631JA3004F
3920JA3001C
Connector, (MECH)Pipe
conversion Connector(l/2")
Balance Conector(1/Z')
Pesking(e19x3t)
4932JA3003D
6631JA3004G
6631JA3004H
3920JA3001D
-19-
Remarks
Common Use
No Holes
No Holes
No Holes
No Holes
HOW TO INSTALL REFRIGERATOR
1. Connection
of Pipe Connector
A and B.
Caution
1) Turn off main valve of water pipe.
: • Feed pipe should be connected to cold water
line. If it is connected to hot water line, trouble
may occur.
2) Disconnect water lap from piping by loosening nuts.
• Please check rubber packing when connecting
3) Connect pipe connector A and B to piping after sealing
feed pipe.
the pipe connector with sealing tapes.
4) Connect feed valve to pipe connector A.
5) If there is only one tap water pipe, connect pipe
connector A only and install feed pipe.
Pipe Connector B
\
Single Lever Type Faucet
(general)
General Type
Two Hands Type Faucet
Single Lever Type Faucet (one
hole, tech type and hand spray)
Feed
A
How to wind
Feed
Valve
Sealing Tapes.
Feed
Valve
2. Water Supply
1) After the installation of feed water, plug the refrigerator
to the earthered wall outlet, press the water dispenser
button for 2 - 3 minutes, and confirm that the water
comes out.
2) Check leakage at connecting part, then arrange water
tube and locate the refhgerater at its regular place if
there is no leaking.
Water Tube
--
- 20 -
Water Tube
HOW TO INSTALL REFRIGERATOR
3, When customer
*If customer
uses bottled water,
wants to use bottled water, extra pump should be installed as shown below.
1. The pump system should not be on the floor (it may cause noise and vibration).
nuts of pump.
2. If there is any leakage alter installation,
Securety fasten the inlet and outlet
cut the water tube at right angle and reassemble.
3. When put the water tube end into the bottle, leave a clearance between
bottle bottom and water tube end.
4 Check water coming out and any leakage.
Caution : • If feed tube is more than 4m, less water will come out due to pressure drops.
• Use standard feed tube to prevent leaking.
f"
N
• Outternal Filter
t. Filter Fixation
1) Connect feed tube to the filter outlet and water valve connecting
tube,
2) Fix the filter at proper place around the sink where it is easy to replace the filter and to receive the cleaning water,
Please consider the length of tube shall be less than 12m when locating filter.
3) When fixing the filter, use fixing plate and cable depending on the surrounding conditions.
FixingCable_
FixingPlate
•
Fixing Plate
"J
Hot Water
Cold Water
2. Filter Cleaning
t) Connect feed tube to the inlet of feed valve end filter.
2) Clean the main valve and feed valve with water for at
least one minute until clean water comes out.
Filter Inlet
Filter_
Water
-21 -
HOW TO INSTALL REFRIGERATOR
• Install Water Filter (Applicable
to some models only)
• Before Installing water filter
Control box
1. Before installing the filter, take out the top shelf of the
refrigerator
after tilting it to the direction (O) and liRing it
to the direction ((_)) and move it to the lower part.
2. Remove the lamp cover by pressing the protrusion
under the cover and pulling the cover to the front.
guideline
and the fastening indication line
Control box
and the loosening indication line
• After installing
water filter
Reassemble the lamp cover and the top shelf of the
• Installing
t. Initial
water filter
installation
of water filter
Remove the filter substitute cap by turning it
counterclockwise (O) by 90 degrees and pulling it down.
Note : Keep it safe to use it later when you do not use the
filter.
refrigerator. To place the top shelf of the refrigerator, raise
the front part of the shelf a bit so that the hook of the shelf
is fit into the groove,
In order to clean the water filter system, drain water for
about 3 min.
Note : Then open the door of the refrigerator and check for
water droppings on the shelf under the filter.
Remove the red cap from the filter and attach the
sticker. Insert the upper part of the filter (_)) after
aligning with the guideline marked on the control box,
and fasten it by turning it clockwise by 90 degrees.
Note : Check that the guideline and the fastening
indication line are aligned.
2. Replacement
of water filter
While holding the lower part of the filter, turn it
countemlockwise (O) by 90 degrees and pull it down.
Note : Check that the guideline and the loosening
indication line are aligned.
- 22 -
HOW TO INSTALL REFRIGERATOR
3. How to Control
the Amount
of Water Supplied
to Icemaker.
3-1. Confirm the amount of water supplied to the icemaker.
1, Pull out the ice bank in the upper part of the freezer compartment,
Caution : * Do not put hands or tools into the chute to confirm
the operation of geared motor.
it may damage refrigerator or hurt hands.)
• Check the operation of motor with its operation
noise,
2. Apply electricity
after connecting
1) Press test switch under the icemaker
2) The bell rings(ding-dong)
water pipe.
for two seconds as shown below.
and ice tray rotates and water comes out from the icernaker water tube.
3) The water shall be supplied two or three times into the tray, The amount of water supplied for each time is small,
Put a water container under the ice tray and press test switch.
4) When ice tray rotates, the water in it will spill. Collect the spilt water and throw away into the sink.
5) When ice tray has finished rotation, water comes out from the water tube. Confirm the amounts of water in the ice tray.
(refer to fig. The optimum amount of water is 110ec)
* It is acceptable
if the adjusted level of water is a bit smaller than optimum level.
- 23 -
HOW TO INSTALL REFRIGERATOR
3-2o Control
the amount
of water
supplied
to the
Caution : When adjusting the amount of water supplied,
icemaker.
adjust step by step. Otherwise the water may
spill over.
Caution : • Please unplug the power cord from the wall
outlet and wait for more than three minutes
before disconnecting PWB cover as 310V is
applied in the control panel
1. Disconnect PWB cover from the upper part of the
refrigerator.
(+) Driver
I
3. When adjustment of control switch for the amount of
water supplied is complete, check the level of water in
the ice tray.
Confirm the amount
of water
2. Adjust the amount of water supplied by using DIP
switch.
• Water Supplying
SWITCH
Time Control C ,tion
NO
Water Suppling
S/W1
S/W2
S/W3
Time
OFF
OFF
OFF
6.5 Sec.
ON
OFF
OFF
5.5 Sac,
OFF
ON
OFF
6 Sec.
ON
ON
OFF
7 Sec.
OFF
OFF
ON
7.5 Sec.
"-.\_'_I_
ON
OFF
ON
8 Sec.
OFF
ON
ON
9 Sac.
ON
ON
ON
10 Sec.
•
1) The water supplying time is set at five seconds when the
refrigerator
is delivered.
2) The amount of water supplied depends on the setting
time and water pressure (city water pressure).
3) If ice cube is too small, increase the water supplying
time. This happens when too small water is supplied into
the ice tray.
4) If ice cube sticks together, decrease
the water supplying
time. This happens when too much water is supplied
into the ice tray.
- 24 -
OpSmum
level)
s S
MICOM FUNCTION
l. Monitor
Panel
1-1. GR-P247, GR-P207, GR-L247, GR-L207
Function
1-2. GR-C247, GR-C207, GR-B247, GR-B207
Monitor
tt'l
====
==
Freezer compartment
temperature
Refngerator compartment
control Button
2. Description
Dispenser se_ec_ca buttO:l
temperatsre control Button
of Function
2-1. Funnction of Temperature
Division
Selection
Power Initially On
1st Press
........
i
Change of
IndicationLamp
m
--,
....
......
m
@@
Temperature
Control
Medium
i
i
*
2nd Press
'==
,
._
.
_
qm.
i
m
*
mm
@@
3th Press
4th Press
_ '-- _.._ _
t
.__
_
_
I
_ __==__ _
i
_
m--.
__,__
_
__,rap
@@
Medium Max
Max
Min
Medium Min
-17 °C
<-18 °C>
Freezer
-19 °C
-22 °C
-23 °C
Control
(-18 °C)
<-19 °C>
(-20.5 °C)
<-20.5 °C>
(-22 °C)
<-22 °C>
-15 °C
<-16.5 =C>
3 °C
1,5 °C
0=C
(7 °C)
4.5 =C
<2 °C>
<1 °C>
<0 °C>
<4,5 °C>
<3 °C>
Refrigeration
6 "C
Control
* The tenqmrature can val_yt-3°C depending on the toadcondition.
1. When power is initially applied or reapplied
*( "1: 127Vi60|lz, 110_115V,"60[lz. 115Vi60Hz Rating ONLY.
*< >:TAIBEI
after power cut, "Medium"
is automatically
2. When the temperature selection switch in the freezer and refrigerator compartments
following sequence:
"Medium" -* "Medium Max" -* "Max" --, "Min" --, "Medium Min" -, "Medium"
3. The
temperature
setting condition of freezer and refrigerator
(GR-P247, GR-P207,
door is closed,
GR-L247, GR-L207,
compartments
GR-C247, GR-C207,
- 25 -
selected.
is pressed, the light is on in the
shall not be indicate in the standard model
GR-B247, GR-B207)
when
refrigerator
or home bar
i
MICOM FUNCTION
2-2. Automatic
ice maker
- The automatic ice maker can automatically
be varied according to various conditions
make 8 pieces of ice cube at a time, 80 pieces a day. But these quantities
including how many times the refdgerator
may
door opens and closes.
• Ice making stops when the ice storage bin is full.
• if you don't want to use automatic
If you want to use automatic
ice-maker, change the ice-maker switch to ON-OFF.
ice-maker
again, change the switch to OFF-ON.
NOTE : It is normal that a noise is produced when ice made is dropped into the ice storage bin.
2-3. When
ice maker
does
not operate
smoothly
Ice is lumped together
• When ice is lumped together, take the ice lumps out of the ice storage bin, break them into small pieces, and then place
them into the ice storage bin again.
- When the ice maker produces too small or lumped together
adjusted. Contact the service center.
:,_ If ice is not used frequently,
ice, the amount of water supplied to the ice maker need to
it may lump together.
Power failure
• Ice may drop into the freezer compartment. Take the ice storage bin out and discard all the ice then dry it and place it
back. After the machine is powered again, crushed ice will be automatically selected.
The unit is newly installed
• It takes about 12 hours for a newly installed rethgerator to make ice in the freezer compartment.
- 26 -
MICOM FUNCTION
2-4. Control of variable type of freezing room fan
1. To increase cooling speed and load response
of RPM and standard RPM.
speed, MICOM vanably controls freezing
room fan motor at the high speed
2. MICOM only operates in the input of initial power or special freezing operation or load response
speed of RPM and operates in the standard
3. if opening
operation for the high
RPM in other general operation.
doors of freezing / cold storage room or home bar while fan motor in the freezing
room operates, the freezing
room fan motor normally operates (if being operated in the high speed of RPM, it converts operation to the standard
RPM). However,
if opening doors of freezing
4. As for monitoring
room or home bar, the freezing room fan motor stops.
of BLDC fan motor error in the freezing
room, MICOM immediately
stops the fan motor by determining
that the BLDC fan motor is locked or poor if there would be position signal for more than 65 seconds at the BLDC motor.
Then it displays failure (refer to failure diagnosis
function table) at the display part of refrigerator,
the cycle of 30 minutes. If normal operation is performed,
status (reset).
2-5. Control
of M/C room
performs re-operation
poor status is released and refrigerator
in
returns to the initial
fan motor
1. The M/C room fan motor performs ON/OFF control by linking with the COMP.
2. It controls at the single RPM without varying RPM.
3. Failure sensing method is same as in fan motor of freezing fan motor (refer to failure diagnosis
function table for failure
display).
2-6. Door
opening
alarm
1. Buzzer generates alarm sound if doors are not closed even when more than a minute consecutively has passed with
doomsof freezing / cold storage room or home bar opened.
2= Buzzer rings three times in the interval of 0.5 second after the first one-minute has passed after doors are opened and
then repeats three times of On/Off alarm in the cycle of every 30 seconds.
3. If all the doors of freezing / cold storage room or home bar are closed during door open alarm, alarm is immediately
released.
cold
room/ C
Doorsstorage
of freezing
or home bar
Opening
L Closing
3T_nes 333_s 3"Sines3_{nes
BUZZER
N
H
i Within i
a minute
=._"
_
A minute
frost
removal
i 30 i 30 i 30i
seconds secondsseconds
2-7. Ringing of button selection buzzer
1. If pressing the front display button, "Ding ~ "sound rings.
2-8. Ringing
of compulsory
operation,
compulsory
buzzer
1. If pressing the test button in the main PCB, "Phi ~ ° sound rings.
2. In selecting compulsory operation, alarm sound is repeated and completed in the cycle of On for 0.2 second and Off for
1.8 second three times.
3. In selecting compulsory frost removal, alarm sound is repeated and completed in the cycle of On for 0.2 second, Off for
0.2 second, On for 0.2 second and Off for 1.4 second three times.
- 27 -
MICOM FUNCTION
2-9. Frost
removal
function
1. Frost removal is performed whenever total operation time of compressor becomes 7 ~ 7.5 hour.
2. In providing initial power (or returning power failure), frost removal starts whenever total operation time of compressor
becomes 4 - 4,5 hour.
3. Frost removal is completed if temperature of a frost removal sensor becomes more than 5°C after starting frost removal.
Poor frost removal is not displaced if it does not arrive at SoC even if two hours have passed after starting frost removal
4. No removal is done if frost removal sensor becomes poor (snapping or short-circuit).
2-10. Sequential
operation of built-in product
Built-in products such as compressor, frost removal heater, freezing room fan, Cooling Fan and step motor damper are
sequentially operated as follows for preventing noise and part damage occurred due to simultaneous operation of a lot of
parts in applying initial power and completing test.
Function
Remark
Load Operation Sequence
When temperature
ofa frost removal
sensorbecome3
more than 25°C
If errorescors
POWER
i
0.5
sec.
_
COMP
0.3
sec.
_
i
(In
purchase,
movement)
;
ON
ON
F-FAN
&
C-FAN
ON
0.3
STEP
sec.
_
MOTOR
DAMPER
ON
0.3
sec.
_
HOME
BAR
HEATER
ON
during operation,
initialoperationis
not done.
When
_
temperature of a
5
frost removal
sensor becomes
less than 25°C
(In power failure,
service)
-=_-"_
POWER
0.5
FROST
8
FROST 0.3
sec. REMOVAL sec. REMOVAL sec.
ON
0.._ WATER
_ec TANK
--
HEATER
ON
5
WATER
sec.
_
TANK
HEATER
ON
HEATER
OFF
i
WATER
= O.3 SUPPLY
sec.
&
HEATER _
OFF
HOME
BAR
5
sec.
HEATER
ON
5
sec,
DISPENSE -_
HEATER
ON
COMP
ON
HOME
BAR
HEATER
OFF
O.3
sec.
F-FAN
&
"-->
C-FAN
ON
0.3
sec.
___
STEP
Testmode 1
(Compulsory
funotion)
-.d
m
b9
-H
O
Test mode 2
m
(Compulsory frost
removal)
TEST
S/W
(Press
Once)
TEST
S/W
(Press
2 times)
_
OTHER
LOAD
OFF
COMP
_
OFF
0,3
sec.
_
COMP
ON
o.3
S_C.
_
F-FAN
&
C-FAN
OFF
-28-
0.3
set:,
_
F-FAN
&
C-FAN
ON
MOTOR
DAMPER
OPEN
o.3
FROST
0,3
STEP
_;
REMOVAL _
MOTOR
HEATER
DAMPER
ON
CLOSE
If pressingswitch
once more in the
test mode 2 or
temperature of a
frostremoval
ser_or is mona
than 5°C, it
immediately
returns to the test
mode for inilial
operation
(COMP operates
aifer 7 minutes).
MICOM FUNCTION
2-1 5, Failure
Diagnosis
Function
1. Failure diagnosis function is function to facilitate service when nonconforming
dudng use of product,
matters affectlng performance
of product
2. In occurrence of failure, pressing the function adjustment button does not perfon-n function and only alarm sound (=Ding-") dngs.
3. If nonconforming matters occurred are released during display of failure code, MICOM returns to the odginal state (Reset),
4, Failure code is displayed on the display part of setting temperature for the freezing room and the display part of setting
temperature for the cold storage room of LED. which are placed at the display part of a refrigerator. All the LED graphics
other than a failure code are turned off.
G R-B(C)207,247*CA
G R-P(L)207,247*RA(QA)
TROUBLE
COOEINDEX
-_
Trouble
C0deI_
No.
Abenrmalfrenzer(F)
sensor
2
Abnormal
refdgeratorsensor
1(R1)(upper shelf
in the refrigerator)
Abnormal
refrigeratorsensor
2(R2) (lower sheif in
the r_gemtor)
3
4
Abnormaldefrost
sensor
5
Faulty defrost
F4
F3
F2
•
•
•
•
•
_T
7
Normal
__
__
Cor_ess_-
Freezersensoriscutorshortcircuited
Freezer
Fan
15minoW
15rob©If Standard
RPM
Cooling
Fan
Defrost
_eppi_
Hea_
M010r
_
O
©
©
Upper shelf refrigerator sensor is
cutor short-drcuiled,
©
Standard
RPM
©
©
0pe_f_'/
Lowershetf refngeratorsensor is
cutor short_rcuited.
©
Standard
RPM
O
O
O
Defrostser_oriscutorshortcircuited
©
Standard
RPM
©
Nodefrost
©
Defrost heater andtemperature
O
Standard
©
©
©
©
©
©
©
©
/
•
_
Y
•
•
fuse are cutanddiscensected.
(Indicatesallarat leastfour hours
whentroublesoccur)
No position-signal over 65s when
__•
•__
Abnormal cooling
BLDC fan motor
FI
Note 1)
Abnormal freezer
BLDC fan motor
©
Troubles
..(_)_..(_,)_
6
Off
Operation Status During Trouble
Trouble items
1
:On
RPM
©
fan mctor operate
• _
fan motor operate
0FF(cI_
0pe_
3amin=rr_
No positien-sigselover 6,% when
•
15_
©
O
CR:(o_ed_
O_n=_l_
8
Abnormal room
temperature sensor
Note 1)
Roore temperaturesensor (RTSer_or) iscut or short_rcuited.
O
CI
©
©
©
9
Abnormal icemaker
Note 1)
Icemaker sensor is cut or short-
©
©
©
©
©
10
sensor
Abnormal leemakar
unit
Note 1)
©
Standard
RPM
©
O
©
circuited.
Fauity motoror hall IC in
leemaker unit. Lead wire is cut or
shofr-circuited.Faulty motor
drivingdrcuile
- 29 -
MICOM FUNCTION
Note1) The abnormality
of RT-Sensor,
R2*Sensor
Icemaker Unit, and Icemaker-Sensor
is indicated when checking LED (when pressing both freezer temperature
control button for more than 1 second at the same Ume)+
i
RT-Sensor
R2-Sensor
llCc_em_kk;rr
_i_sor
2-16.
is not indicated in trouble code but it
control button and refrigerator
Normal : (_
LED on,
Normal : (_
LED on,
Abnormal
Normal : (_
LED on,
Abnormal
LED Off. 1
Abnormal: : (_)
(_)LEDOff.
Normal : (_)
LED on,
Abnormal
: (_) LED Off.
temperature
The rest of LEDs
are all on.
: (_) LED Off.
Test Function
1. The purpose of test function is to check function of the PCS and product and to search for the failure part at the failure
status.
2. Test button is placed on the main PCB of refdgerator (test switch), and the test mode will be finished after maximum 2
hours irrespective of test mode and then is reset to the normal status.
3. Function
adjustment
button is not perceived during performance
of test mode but only warning sounds ring.
4. In finishing test mode, always pull the power cord out and then plug-in it again for the normal state.
5. If nonconforming contents such as sensor failure are found during performance
display the failure code.
of test mode, release the test mode and
6. Even if pressing the test button dudng failure cede display, test mode will not be performed.
MODE
Test I
HANDLING
Press TEST s/w once.
CONTENTS
1. Compressor
continuously
REMARKS
operates.
2. Freezer fan (high speed RPM), Cooling fan
continuoosly operates.
3. Defrost heater is off.
+ Forced operate.
- Freezer fan is off when
door is opened.
4. All display LEDs are on.
5, Stepping
motor damper is in open
conditions.
Test 2
Press TEST s/w once at
TEST1 conditions.
(baffle is open)
1. Compressor
is off
2. Freezer fan, Cooling fan are off.
3. Defrost heater is on.
4. All display LEDs are off. (Freezer room "2"
LED and Refrigerator room "2" LED are
- It returns to normal
conditions
when the
temperature of defrost
sensor is above 5°C.
- Forced defrost.
only ON.)
5. Stepping motor damper is in closed. (baffle
is closed).
Normal
Conditions
Press TEST s/w once at
Returns to the initial conditions.
TEST2 conditions,
Compressor
starts after
seven minutes delay.
-30-
EXPLATION FOR MICOM CIRCUIT
I. Explanation
for PWB circuit
1-1. Power circuit
1. GR-L207ERA,
GR-L247ERA,
GR-B207ERA,
Power circuit consists of SMPS (SWITCHING
GR-B247ERA
MODE POWER SUPPLY) power. The SMPS consist of the rectifying part
(BD1, CE1) converting AC voltage to DC voltage, the switching part (IC2) switching the converted DC voltage, transformer
transferring energy of the primary side of the switching terminal to the secondary side end the feedback
transferring it to the primary side.
Caution
: Since high voltage (DC31OV) is maintained
at the power terminal,
pert (IC3, IC4)
please take a measure after more than 3
minutes have passed after removing power cords in the abnormal operation of a circuit.
Voltage of every part is as follows:
Part
Voltage
VA1
220
Vac
CE1 Vdc
inspection
16CE2
Vdc
CE3
CE4
CE
12 Vdc
15.5 Vdc
5 Vdc
BOI
RVg-15O6
_
I ;
ICI
-'
comrL1
IC2
'L___!]]
•Ir l_
5
L_,._
I ='
T.-.._-_=
_
t--L_
I '_
I
I
I= I_,.L _=
I'_
L
]
,I, BI
(MICBH)
m
_
l--
T
1_t
-
_
T,N92
,
1
T'" !"T
i
_
_I"
=
_ref
I=
Ic4
T
_:
2_
E_r
_D
- 31 -
EXPLATION FOR MICOM CIRCUIT
1-2. Oscillation
circuit
Oscillation circuit is a circuit with the purpose of generating
calculation
in relation with information
use rated parts since if SPEC is changed,
<GR-L207ERA,
CST4,0OMGW[ _]
basic time for clock occurrence for synchronization and time
transmission/reception of inside elements of ICl (MICOM). The OSCt must always
time calculated
at the ICl may be changed or no operation
GR-L247ERA>
<GR-B207ERA,
is done.
GR-B247ERA>
Fr:qTiq,
i
CST4.QOk4GW, I
I(MIc "t
r_-fosc_r7
"=
I_
31_
J_,
OSCI[Z
I
1M
t Rlo3O_
L½_,
__Tj
1-3. Reset circuit
The reset circuit is circuit allowing various parts such as RAM inside of MICOM (ICl) to initial_e
and the whole of function to
start from the initial status, when initial power is input or when power is applied again to MICOM by a spontaneous
power
failure. 'LOW' voltage is applied to the reset terminal of MICOM in the beginning of power supply for a constant time (10ms).
Reset terminal during general operation is 5V (No MICOM operates in failure of RESET IC).
<GRoL207ERA,
GR-L247ERA>
<GRoB207ERA,
1
10,2 £
CC9
2
t04
IC7
CCtO
104CC9
- 32 -
2
3
GR-B247ERA>
Zf Rll
ccg
4,7K
/_104
EXPLATION FOR MICOM CIRCUIT
1-4. Loadldispenser
1. LOAD DRIVING
operation, buzzer driving, door opening circuit
CIRCUIT
* InEven if opening the door of freezing room or cold storage room during operation of fan motor at the freezing room, this
circuit does net stop and operates at the standard RPM. In addition, if doors of freezing room or cold storage room, the
fan motor normally operates at the RPM previously operated.
(A), (B), (C) and (D) of door switch for the freezing room or cold storage room are connected to the door open sensing
circuit in parallel toward both ends of switch to determine door open at MICOM.
Since a door switch of the home bar is connected to door switch (C), (D) of the cold storage room, it senses door opening
if even one of both is opened.
The fan motor is immediately stop if opening doors of the freezing room or cold storage room at the TEST mode and it
immediately operates if closing them.
1) GR-L207ERA,
GR-L247ERA
Measuring
Frost Removal
Heater
COMP
Type of Load
No.16
part (IC6)
No.15
R-reem LAMP
No.16
IC7-13
Water Tank
Heater
IC7-14
Within 1 V
jo.
Status
AC Converting
Relay
OFF
12V
ICI
(MIC[]M)
CON2
P73
F-lit]DR
:
V
CQf,IP
I_l_
(AINI_)
0LP
RYZ
JW1 _'HN
r
t4
3
4
P_
rAIN11)
t 1\(31
i
16
I
2
DEP-HEATER
p72
{AINi2)
FUSE-MELTING
CON3
RYB
AI_IT2
V/_'ANK
H/lIAR
D(]OR S/V
,
3
HEATER
P76
tAINt6)
R-DDDR S/V
½
CON4
IC7
R'tl_
EOII-_I
R-LAMP
p01
CONE
P04
- 33 -
EXPLATION FOR MICOM CIRCUIT
2) GR-B207ERA,
GR-B247ERA
# The fan motor at the freezing room does not stop but operates if opening doors of the freezing room or cold storage room
or the home bar during operation of the fan motor at the freezing room.
_=(A), (B), (C) end (D) of door switch for the freezing room or cold storage room are connected to the door open sensing
circuit toward both ends of switch to determine door open at M[COM.
Since a door switch of the home bar is connected to door switch (C), (D) of the cold storage room, it senses door opening
if even one of both is opened.
Type of Load
Measuring
No,lO
part (IC7)
Status
t
Frost Removal
Heater
COMP
No,ll
AC Converting
Relay
R-room LAMP
No.12
No.14
Homebar
Heater
No.16
Within 1 V
OFF
12V
--Q
P0_R
IC1
(MICOM)
RYI
IO6
g
_C,_ACnOR
12
S
4
_73
:_N13)
RY2
JY410FHN
10
7
2
?dN11)
RY3
VSB-121_
tl
6
3
=72
DEF-HEATER
DOOR$/V
SIV
F;,%o.
RY4
D8
R-LAMP
=03
F-LAMP_
H/BAR
R-BOOR
CON3
1
HIBAR-HEATER
>06
-34 -
EXPLATION FOR MICOM CIRCUIT
2, Dispenser
operation
circuit
]
IC6
POWER
RY4
JWlOR_N
!3
4
5
_74
:AINI4)
AUGER
MOTOR
RY5
ALDl12
=75
SOLENCtD
CUBE
DISPENSE
LEVERS_W
:AINlS)
CON4
RY7
ALDtl2
ICE
_77
I
:Al.l_)
111 @
WA_R
R_
JN.Dll2
DI2
=00
CONE
[C1
R'¢10
(MICOM)
SOLENOtD
DISPENSER
=02
R'¢11
A1_112
PILOT
015
VAL_
@
R_
11_721
4
_/2w
DESP-LAMP
RIO
14
";'_ cc_1
1) Check load driving status
WATER VALVE
Type of Load
Measuring part
Status
GEARED
MOTOR
IC6-No.13
t °N
SOLENOID
CUBE
IC6-No.12
ICE
WATER
IC6-No.ll
IC6-No.10
SOLENOID
DISPENSER
HOME BAR
HEATER
No.12
No.IO
Within 1 V
OFF
12V
2) Lever S/W sensing circuit
ICl(Micom)
(No. 16)
(60 Hz)
On(Press)
5V
OFF
- 35 -
SOLENOID
PILOT
NO.16
EXPLATION FOR MICOM CIRCUIT
3. Door opening sensing circuit
<GR-L207ERA,
GR-L247ERA>
h,,
L -- -
,"._r .....
R63
"1.;
I
I
R47
Ih .....
I
IK
G0
7
_CONDtTIONS
M_qURING_-.._
POINTS
Bell sounds when button on
dosplay is pressed,
Beep sounds when warning
door opening.
,0053, 0.2s >,0.1s,. 04 s
IC1 (No. 48 Pin)
GR-B247ERA>
I
120
,,
<GR-B207ERA,
0.5s
,
O,5s
OFF
,
5V
5V
r_
0 v ._i,
L
-r --Z-
5V
,
0V
mD
r
_
r
_
I
€
IC1 (No. 51 Pin)
0V
0v
<GR-L207ERA,
_.63 kz(DING)_ .21_ (BONG
GR-L247ERA>
<GR-B207ERA,
GR-B247ERA>
Measuring part
IC1 (MICOM)
No. 47, 46 Pin
Door of Freezing/Cold Storage Room
Closing
5 V (_) - _), (_) - _).
S/W at both ends are at Off status)
Opening
5 V (_) - _), (_)- (_.
S/W at both ends are at On status)
Since door switch sensing switch (A), (B) are a separate switch even if the door switch of the freezing room normally
operates, they may fail to sense door opening in the failure of switch at both ends of (A) and (B) or in failure of the L/wire.
Lamp does at the cold storage room not turn on if the door switch of the cold storage room fails to sense the door open
switch (c), (d) or the home bar switch.
- 36 -
EXPLATION FOR MICOM CIRCUIT
1-5. Temperature
sensing circuit
I) GR-L207ERA, GR-L247ERA
R30 (_T
16.2KF
RF1
104 _
=J
= _2
RDI
CCI5_-
2K
P66
CON7
(AINS:
P65
(AIRS;
D-SENSOR
F-SENSOR
1OCt/_
IC1
(MICE]M)
P62
CON8
RSO
58
(_T
RR1
2&IKF
CAIN2:
i
oc22T
P63 i 59
_
(_
CAIN3)
R2-SENSOR
R1-SENSOR
104 --
CON9
P64
B0
(AtN¢:
P67
;3
RIM1
lS.2KF
RS2
=2J,o4_
_
_
ICE
R_
IOKF
MAKER
SENSOR
RT-SNR
(_N7)
The above circuits are circuits attached to freezing room sensor or cold storage room sensor for adjusting ,setting
temperature at the freezing room and cold storage room, ice-making sensor for sensing water temperature in ice-making, or
an evaporator for sensing temperature of a frost removal sensor necessary for frost removal. Short or open status of every
temperature sensor is as follows:
SENSOR
Freezing sensor
CHECK POINT
POINT _
POINT (_ Voltage
Cold storage sensor 1
POINT (_ Voltage
Cold storage sensor 2
POINT @ Voltage
Ice making sensor
POINT (_ Voltage
POINT _
IN SHORT
IN OPEN
0.5 V~4.5 V
OV
5V
Voltage
Frost removal sensor
Room temperature sensor
NORMAL(-30 "C ~ 50 °C)
Voltage
- 37 -
EXPLATION FOR MICOM CIRCUIT
2) GR-B207ERA,
GR-B247ERA
IC1
(MICOM)
CON5
PSI
52
R36
(AJN_
P6!
(NN5
CCt71
2K
,°,
R37
cclsl
_"
T
16,2KF
RF1
.el
26.1KF
I
D-SENSOR
F-SENSOR
10# f_
RR1
CON6
T
P6: 58
(A=N21
cc2oi
_
P61 59
(_N_
cC21.L
_
R4O
RI-SENSOR
T
R2 - SENson
26.1KF
104 nT7
P6"
f
R21
63
T
10KF
RT1
(AIN7)
cc1__1o4
mT
The above circuits are circuits attached
'_
_
RT-SENSOR
to freezing room sensor or cold storage room sensor for adjustJng setting
temperature at the freezing room and cold storage room, ice-making sensor for sensing water temperature in ice-making, or
an evaporator for sensing temperature of a frost removal sensor necessary for frost removal. Short or open status of eve_
temperature sensor is as follows:
SENSOR
CHECK POINT
Freezingsensor
POINT _) Voltage
Frostremovalsensor
POINT _
Coldstorage sensor 1
POINT _) Voltage
Coldstorage sensor2
POINT _) Voltage
Roomtemperaturesensor
POINT (_ Voltage
NORMAL(-30 "C - 50 °C)
IN SHORT
IN OPEN
ov
5v
Voltage
0.5V~4.5V
- 38 -
EXPLATION FOR MICOM CIRCUIT
1-6. Switch
entry circuit
The following circuits are entry circuits for sensing signal form test S/W, electronic
examining refrigerator,
1) GR*L207ERA,
GR-L247ERA
2) GR-B207ERA,
single motor damper reed S/W for
GR-B247ERA
MICOM)
2o
_.$__
s/_
IC1
1-7. Option designation
circuit (model separation function)
1) GR-L207ERA, GR-L247ERA
2) GR-B2O7ERA, GR-B247ERA
OP1
18
11 IC1
L(M,coM>
The above circuits are used for designating separation by model as option and notifying it to MICOM. Designation
by model and the application standards are as follows:
I_ These circuits are accurately pre-adjusted in shipment from factory and so you must not additionally
option,
Separation
OP1
Connection
Status
Application
Standard
Connection
Export model
OUT
Domestic model
- 39 -
of option
add or remove
EXPLATION FOR MICOM CIRCUIT
1-8. Stepping motor operation circuit
I
9,15
MICO
(ICI)
CE8
luf-
IC10
TA7774P
1,2
/50
P14 21
CON9
15
9
A
14
10
B
n
II
,o
12
STEPPING
P15 22
P16
23
3
4,5
13
For motor driving method, rotation magnetism
is formed at coils wound on each phase of motor and stator and so motor
becomes to rotate if applying "High" signal to the IC8 (TA777AF)
by step numbers fixed through MICOM PIN 34 and 35.
Explanation)
at the MICOM PIN 33 and outputting
=High", "Low" signal
For driving method of the stepping motor, send signals in the cycle of 3.33 mSEC using terminal of MICOM
PIN 33, 34 and 35 as shown in wave form of the following part,
These signals are output to the output terminal (No. 10, 11, 14, 15) via the input terminal (No, 3.6, 8) of the
IC10 (TA7774F) as IC for motor driving. Output signals allow motor coils wound on each phase of stator to
form rotation magnetic field and the motor to rotate. Inputting as below figure to the input terminal (INA. I NB)
as IC {TA7774AF) for motor ddving allows motor coils wound on each phase of stator to form rotation
magnetic field and the stepping motor damper to rotate
CCW (Reverse rotation) ,_---
(Positive rotation) CW
--_"
i
i
i
i
i
I
0
i
i
i
i
I
i
i
i
i
i
I
I
i
i
i
I
I
I
I
i
I
I
i
I
I
i
,NA
,.B
:'
I
i
i
=
i
I
i
i
i
i
I
i
i
I
A
I
i
i
I
i
i
i
i
i
I
i
i
t
J
i
i
i
I
I
J
I
I
I
I
I
I
i
-40 -
I
I
-i__
I
i
I
EXPLATION FOR MICOM CIRCUIT
1-9. Fan motor
driving
circuit
(freezing
room,
M/C room)
1. This circuit performs function to make standby power'O' by cutting off power supplied to ICs inside of the fan motor in the
fan motor OFF.
2. This is a circuit to perform a temporarychange of speed for the fan motor and applies DC voltage up to 7.5V ~ 16Vto
motor.
3. This circuit performs function not to drive the fan motor further by cutting off power applied to the fan motor in the lock of
fan motor by sensing the operation RPM of the fan motor.
1)GR-L207ERA,
GRoL247ERA
@,@parf
Motor OFF
5V
Motor ON
2 - 3V
(_)pa_
2V orless
(_ (_part
ov
8 ~ 16V
ov
12 ~ 14V
CON7
R37
ICI
(HICOH)
330
KTA170S
620
C-FAN
(_)pa_
2V orless
P5€
PVM
4.7K
53
7
,
R35
3,9K
D20
2 "_'FRI02
Q5
R34_
R36
CE6
220uF ;
/25v -
8
P51
C-FAN LOCK
R39
50
z<
9
ZD4 A_
6.2V
CC1B
._w
102
R€4
33O
Q6
KTA170_
4.7K
1N4735
R42
F-FAN
P53
PVM
5_
Q7
R43
PS0
LQCK
620
d
3.9K
R41 _
F-FAN
R45
IQ_C3t
2
98 Z'
- DZ2
_' m102
49
CE7
L-i
T
/25V
22Our?
1
2'_
223
CC19
11
.TK
Io
.J-
tN4735
6.2V
CC20
102
-41 -
EXPLATION FOR MICOM CIRCUIT
2) GR-B207ERA,
GRoB247ERA
IC1
CON5
R31
330
(MICOM)
KTA17C,5
2
620
C-FAN
P54
PWN
4.7K
53
R34
3.9K
- D13
O-[QK_C319
B _'FR102
4.7K
P53
P_/H
8
9
m_02
R24
330
R26
3.9K
52
KTA1705
R2B
620
_L___oH@"-_
R25_
12
11
R22
2K
49
F-FAN
iCC16
P51
LOCK
1N4735A
ZD2
k/_
6.2V
F-FAN
/25v
:_F+
T223
R29
ZK
5O
C-FAN
7
__¢_lrt
PSO
LOCK
10
CC13
1N4755A
ZD1
6.2V
_
- 42 -
102
EXPLATION FOR MICOM CIRCUIT
1-10. Temperature
compensation
and over-cool/weak-cool
compensation
circuit
1, Temperature compensation at freezing room, cold storage room
1) GR-L207ERA,
GR-L247ERA
IC1
(MICOM'
16t<
_:4
I(7<
IR15
T_mpeP_t_r'e
Compems0.llom
cLt
R-Poor_
C-RT]
T_'mper_±tJre compensation _t
L 10--K_
J f__FT 7
R_room
60
{_INO]
5? PS_
56
(AINI)
IC1
2) GR-B207ERA,
(MICOM
GR-B247ERA
10K
C-RT7
1OK
Te'_peP_t_re
compenso._ion
o±
R-Poom
5_
Ter_per'_,_Pe
comparison;Ion
al:
R-PooI_
57
L IO_K_J Rc-FT7
Freezing room
Resistance value
(RCF1)
_60
,AIN0)
P61
IAINI)
Cold storage room
Temperature
compensation
Resistance value
(RCR1)
Temperature
compensation
Remarks
180 k£J
+5 °C
180 k<_
+2.5 °C
Warmly
56 k_Z
+4 =C
56 kQ
+2.0 °C
compensate
33 k_2
+3 °C
33 kQ
+1.5 °C
A
18 k.Q
+2 °C
18 k.Q
+1.0 _'C
12 Id2
+1 °C
12 k_;_
+0.5 °C
10 k,Q
0 °C
10 k_;_
0 °C
8.2 k_
-1 °C
8.2 k_
-0.5 °C
5,6 k,O
-2 °C
5.6 k.Q
-1.0 °C
3.3 k._
-3 °C
3.3 k,Q
-1.5 °C
t
2 k_2
-4 °C
2 k_2
-2.0 °C
Coolly
470 _
-5 °C
470 _
-2.5 °C
compensate
_" Temperature
compensation
Ex) If changing
(modified
Reference temperature
=
/
table by adjustment value (difference value against current temperature)
compensation resistance
resistance)
/
temperature
at a cold storage room (RCR1) from 10 k_ (current resistance)
at the co d storage w
increase by +1°C.
- 43 -
to 18 kQ
EXPLATION FOR MICOM CIRCUIT
I_ Temperature compensation
table at the cold storage room is as follows:
470_
2k_
3.3kD
5,6kQ
8.2k_
10k.Q
12kD
18k_
33k_
56kD
180k_._
0.5°C
1°C
1.5°C
2°C
2.5°C
3oC
3.5oc
4oC
4.5oc
5oc
Up
Up
Up
Up
Up
Up
Up
Up
Up
Up
resis_m_
No
470_
0.5 "C
No
0.5 °C
1 °C
1.5 °C
2 °C
2.5 °C
3 °C
3.5 °C
4 °C
4.5 °C
2 k_.2
Down
change
Up
Up
Up
Up
Up
Up
Up
Up
Up
1 °C
0.5 °C
No
0.5 °C
1 °C
1.5 °C
2 °C
2.5 °C
3 °C
3.5 °C
4 °C
3.3 k,_
Down
Down
change
Up
Up
Up
Up
Up
Up
Up
Up
1.5 °C
1 °C
0.5 °C
No
0.5 °C
1 °C
1.5 °C
2 °C
2.5 °C
3 °C
3.5 °C
Down
Down
Down
change
Up
Up
Up
Up
Up
Up
Up
2 °C
1.5 °C
1 °C
0.5 °
No
0.5 °C
1 °C
1.5 °C
2 °C
2.5 °C
3 °C
Down
Down
Drop
change
Up
Up
Up
Up
Up
Up
2.5 °C
2 °C
1.5 °C
1 °C
0.5 °C
No
0.5 =C
1 °C
1.5 °C
2 °C
2.5 °C
Down
DOwn
Down
Down
Down
change
Up
Up
Up
Up
Up
3 °C
2.5 °C
2 °C
1.5 °C
1 °C
0.5 °C
No
0.5 °C
1 °C
1.5 °C
2 °C
Down
Down
Down
Down
Down
Down
change
Up
Up
Up
Up
3,5 °C
3 °C
2.5 °C
2 °C
1,5 °C
1 °C
0.5 °C
No
0,5 =C
1 °C
1,5 °C
Down
Down
Down
Down
Down
Down
Down
change
Up
Up
Up
4 °C
3.5 °C
3 °C
2.5 °C
2 °C
1.5 °C
1 °C
0.5 °C
No
0,5 °C
1 °C
Down
Down
Down
Down
Down
Down
Down
Down
change
Up
Up
4.5 °C
4 °C
3.5 °C
3 °C
2.5 °C
2 °C
1.5 °C
1 °C
0.5 °C
No
0.5 °C
Down
Down
Down
Down
Down
Down
Down
Down
Down
change
Up
5 °C
4.5 °C
4 °C
3.5 °C
3 °C
2.5 °C
2 °C
1.5 °C
1 °C
0.5 °C
No
Down
Down
Down
Down
Down
Down
Down
Down
Down
Down
change
5.6 k_
Cold storage
8.2 k.Q
room
(RCR1)
10 kD
12 k.Q
18 k_.3
33 I_
56 k_._
180 k_;_
• Temperature
Temperature
change
Dmvn
compensation
compensation
at the freezing room is also performed in the same manner as cold storage room.
value is equivalent to two times the cold storage room.
• This circuit is a circuit to enter the necessary level of temperature compensation
model at the cold storage room into MICOM.
- 44 -
for adjusting different temperature
every
EXPLATION FOR MICOM CIRCUIT
1-11.
Key Button
1. GR-P247,
Input and Display
GR-P207, GR-L247,
Lighting
Circuit
GR-L207
This circuit is to judge the work of function control button on the operation panel and to light each function indication led
(LED module). It is driven by SCAN method.
MICOM
(Ici)
_----:I.
_,
CON6
_:m,,.
CONIOt
L____j
t
i(_
i
F4
r5
R3
R_
*lo
' PWB ASS'Y,DISPLAY
F5 _
--Ma=--
F3_-FI
_
_
R5
_*
Rr
• --=R3
--Wn--
s
R
2. GR-C247,
GR-C207,
IC1
T
GR-B247, GR-B207
I
(MICOM) I..
r --i-_n
_
C1_4
r ....
CON101
7
LL_--'_/J F _:_-q
F4
p_
R3
I_
Iw,
o
mu
PWB
-45 -
ASS'Y,DISPLAY
EXPLATION FOR MICOM CIRCUIT
2, Compensation
circuit for weak-cold,
over*cold
at freezing
1) GR-L20TERA, GR-L247ERA
room
2) GR-B207ERA, GR-B247ERA
iRIl_4 : I
i
IC1
(MICOM:
RI0
18K
t
[
,.&,
RI9
JCR1
JCR2
i JCR3
JCR4
Temperature compensationin CUT
+1 °C
+2 °C
+1 °C
-1 °C
.2°C
-1 °C
Compensation
for weak-cold
Compensation
for over-cold
Temperature compensation value
at cold storage room
JCR3
JCR4
JCRI
JCR2
5--5
5--b
5---6
6--6
5---6
5--6
-1 °C
CUT
5--'b
5--6
-1 °C
5"6
CUT
6----6
+1 °C
6----6
CUT
+1 °C
CUT
5--6
5-%
5--5
0 °C (In shipment
CUT
CUT
5--6
5--6
CUT
CUT
+2 °C
CUT
5--6
CUT
6--_
0°C
CUT
5---6
CUT
O °C
6--6
CUT
5--6
CUT
CUT
CUT
CUT
5---6
CUT
CUT
CUT
+1 °C
CUT
CUT
CUT
CUT
O°C
Remarks
from factory)
-2 °C
0 °C
CUT
CUT
I_ The above option circuit is a circuit to compensate
0 °C
-1 °C
for temperature at the cold storage room by simply cutting in service.
- 46 -
EXPLATION FOR MICOM CIRCUIT
3. PWB parts diagram
and list
3-1. PWB Ass'y, main part diagram
1, GR-L207ERA,
GR-L247ERA
ITim
%
1_j ; .4:-:;2-_
iJ,il..d:
"_
........
qp_
_ _.I I ,.......................
_,, _.,_'_.__ ..........
J
!
- 47 -
% /
i
EXPLATION FOR MICOM CIRCUIT
3-2. Parts list
1. GR-L207ERA,
_o.
_
GR-L247ERA
No= =C:SaU_I_N
_70JB801'
_AIN
_
R*1_11_A
_70JB2Ot_
m
IdAKEF
_
_ll
m
MAKEF
I
=16
2:1.74_1_
I
SAMH_J
T
I
_J_
I
Sk_ H_
I
7
_m
_EL
_m
_20_"16"21-3
15
_2ZJB2D01_I_COM _
_iP87C841p
T0._I_
<IATBOOSAIK,_.C
C5
C]A7042AF
K.E.C
IC_
(ID65003AF
K.E.C
16 _
RE_X_r0R
17
m
RESET
18
--
DI_E
19
_loTr/_o_
m
DRIVE IC
rA7774AF
--
20
I_Z2_
DRIV_ IC
3A622._
ROHk
Ctl
21
_K_I_
DRIVE IC
_TR--G6_
SM#_J
C2
22
}1_031_
<1A43"
K.E.C
C4
23
]TOT210_
TO3_
C3
m
C8
24
25
IC
IC
4_u,l_m
IC6.7
PHOTO 1R rLP721F
i_OJ_Lffi_J
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RY1,3
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i_2_1_
_H12D_-O-
VABL
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ry11(R=LAMP
m_k_
26_
10.47.50
[
_2_
28
_
_Q-Ot12
NNS
_4.Dl12
NNS
8"62
1'_1_7,10_t_13
=1
32
_tO_,10800R
NR14D_2
IL
JIP
NI_4D_7
IL
JIF
34--
,_
_
_11_
IN4007
42
_
_
63
_0$1480_
SII_IGEI_
ROH_
_
O3SBA60
_i
_01
_
_
I_t_._17,11 _
IN414_
-49 -
24,]5,42
I
EXPLATION FOR MICOM CIRCUIT
O_KO+
LSOUPa_
991
s_
¢_KER
KTA1705
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02,4
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103 --
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3P,DIF
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4360701_
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_,2
J29_J34
J_O Y4RE 0*6XlOmm
4360701_
_1
*cT
_35
FI.Jr2(RJS_)
10_
JCR2
JCR3
JCR4
4360701J
JUMP "MRE
_6Xt0mm
'1_60701!
OUMp NR
O.SXt0mm
i0 6 _O_JBS_I_----,_
I C _3L_R
_
PILK_ O 3Rt
107 _O_CO7, _1 _511_
108
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tO9 m
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--
_vg10320
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-1
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tt2 -I t 3 )t_l_l(U
O_OX£ I:Ol- t 50
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- 50 -
EXPLATION FOR MICOM CIRCUIT
4. PWB circuit diagram
1. GR-L207ERA,
- PWB circuit
diagram
may vaD' a little bit depending
on actual condition.
GR-L247ERA
,
P..
PWB ASSW.SUdN
-$3-
/---
EXPLATION FOR MICOM CIRCUIT
-54-
ICEMAKER
ANDDISPENSER
OPERATION
PRINCIPLE
ANDREPAIR
METHOD
1. Working Principles
1-1. Ice Maker Working
Principles
• Leve_ Ice Maker Cube Mould for "Initial Control"
after power is input.
• Wait until the water in the cube mould is frozen
after ice maker starts operation.
• Check ice bank is full of ice by rotating ice ejection
motor in normal and reverse direction and eject ice into
the ice bank if ice bank is not full.
• Conduct "Ice Making Control" after supplying
cube mould by operating water valve.
water icto the ice maker
• This is for refrigerator assembly line and service. When "ice making test switch" is pressed,
it operates in the following steps: initial --_ ice ejection --_water supply control steps.
%2. Dispenser
Working
Principles
1. This function is available in Model GR-P247,
GR-P207 and GR-L247,
GR-L207 where water and ice are available without
opening freezer compartment door,
2. =Crushed Ice" is automatically selected when power is initially applied or reapplied after power cut.
3. When dispenser selection switch is continuously pressed, light is on in the following sequence:
=Water" , "Cube Ice" , "Crushed Ice".
4. Lamp is on when dispenser
5. When dispenser
be dispensed
rubber button is pressed end vice versa.
crushed ice rubber button is pressed,
dispenser solenoid and geared motor work so that crushed ice can
if there is ice in the ice bank.
6. When dispenser
cube ice rubber button is pressed, dispenser
cube ice can be dispensed
7, When dispenser
solenoid, cuba ice solenoid and geared motor work so that
if there is ice in the ice bank.
water rubber button is pressed, water valve opens and water is supplied if water valve is normally
installed on the right side of the machine room.
8. Ice and water are not available when freezer door is open.
- 57 -
ICEMAKER
ANDDISPENSER
OPERATION
PRINCIPLE
ANDREPAIR
METHOD
2, Function
2-1. Initial
of Ice Maker
Control
Function
1. When power is initially applied or reapplied after power cut, it detects level of ice maker cube mould after completion
MICOM initialization. The detecting lever moves up and down.
of
2. The level of ice maker cube mould is judged by output signal, high and low signal, of Hall IC. Make the cube mould to be
horizontal by rotating ice ejection motor in normal or reverse direction so that High/Low
Pin No. 44.
3. If there is no change in signals one minute after the geared motor starts to operate,
the signal every hour. It resets initialization
of icemaker
4. it judges that the initial control is completed
when it becomes
signal can be applied to MICOM
it stops icemaker operation and check
normal
when it judges the ice maker cube mould is horizontal
5. Ice ejection conducts for 1 cycle irrespect of ice in the ice bank when power is initially applied.
2-2, Water
Supply
Control
Function
t. This is to supply water into the ice maker cube mould by operating water valve in the machine room when ice ejection
control is completed
and ice maker mould is even.
2. The quantity of water supplied is determined
by DIP switch and time.
<Water Supply Quantity Table>
No
DIP SWITCH SETTING
WATER SUPPLY TIME
REMARKS
SIW 1
SNV 2
S/W 3
1
OFF
OFF
OFF
6.5 Sec.
2
ON
OFF
OFF
5.5 Sec.
3
OFF
ON
OFF
6 Sec.
conditions
4
ON
ON
OFF
7 Sec.
a direct tap water connection type.
5
OFF
OFF
ON
7.5 Sec.
6
ON
OFF
ON
8 Sec.
7
OFF
ON
ON
9 Sec.
8
ON
ON
ON
10 Sec.
* The quantity of water supplied
depends on DIP switch setting
and water pressure as it L,
(the water supplied is generally 80 cc
to 120 cc)
* DIP switch is on the main PWB.
3. If water supply quantity setting is changed while power is on, water supplies for the amended time. If DIP switch is
changed during water supply, water shall be supplied for the previous setting time. But it will supply for the amended time
from the next supply.
4. When water supply signal is applied to water and ice valves at the same time during water supply, water shall be supplied
to water valve. If water supply signal is applied to ice valve dunng water supply, water shall be supplied to both water and
ice valves.
2-3. Ice Making
Control
Function
1. Ice making control is carried out from the completion of water supply to the completion of ice making in the cube mould.
Ice making sensor detects the temperature
of cube mould and completes ice making, (ice making sensor is fixed below
ice maker cube mould)
2. Ice making control starts after completion of water supply control or initial control.
3. It is judged that ice making is completed when ice making sensor temperature reaches at -8°C after 100 minutes when
water is supplied to ice maker cube mould.
4. It is judged that ice making is completed when ice maker sensor temperature reaches below -12 °C after 20 minutes in
condition 3.
- 58 -
ICEMAKER
ANDDISPENSER
OPERATION
PRINCIPLE
ANDREPAIR
METHOD
2-4. Ice Ejection
Control
Function
1. This is to eject ice from ice maker cube mould after ice making is completed.
2. If Hall IC signal is on within 3.6 seconds after ice ejection motor rotates in normal direction, it does not proceed ice
ejection but waits. If the ice bank is full, ice ejection motor rotates in normal direction in every hour to check the condition
of ice bank. If the ice bank is not full, the water supply control starts after completion of ice ejection control. If the ice bank
is full, ice ejection motor rotates in reverse direction and sops under ice making or waiting conditions.
3. If ice bank is not full, ice ejection starts. The cube mould tilts to the maximum and ice is separated from the mould and ice
checking lever raises.
4. Ice ejection motor stops for 1 second if Hall IC signal changes from OFF (low) to ON (high) after 3=6 seconds when ice
ejection motor rotatas in normal direction. If there is no change in Hall IC signals within 1 minute after ice ejection motor
operates, ice ejection motor stops as ice ejection motor or hall IC is out of order.
5. If ice ejection motor or Hall tC is abnormal, ice ejection motor rotates in normal direction to exercise initial operation. It
resets the ice maker if ice ejection motor or Hall IC Lsnormal.
6. The mould stops for 1 second at maximum tilted conditions.
7. The mould returns to horizontal
conditions
as ice ejection motor rotates in reverse direction.
8. When the mould becomes horizontal, the cycle starts to repeat:
Water Supply , Ice Making .._ Ice Ejectbn • Mould Returns to Horizontal
Maximum tilting
point
2"
Bankis
0
i
t,,d
,
,
,
i
i
,
,
,
,,
HALLIC
OUTPUT
SIGNALS
HALL tC
OUTPUT
SIGNALS
I ICE CHECKING
AXIS
<Timing Chart During Ice Ejection>
- 59 -
_ -_.'_''
,, ,
i
,zl
i
i
ICEMAKER
AND
DISPENSER
OPERATION
PRINCIPLE
ANDREPAIR
METHOD
2-5 Test Function
1. It is to force the operation during operation test, service, and c]eaeing. The test switch is mounted under the automatic
ice maker. The test function starts when the test switch is pressed for more than 0.5 second.
2. Test button does not work during ice ejection and water supply. It works when it is in the horizontal conditions. If mould is
full of ice during test function operation, ice ejection control and water supply control do not work.
3. When test switch is pressed for more than 03 second in the horizontal conditions, ice ejection starts irrespect of the
mould conditions. Water shall be splashed if test switch is pressed before the water in the mould freezes. Water shall be
supplied while the mould returns to the horizontal conditions after ice ejection. Therefore the problems of ice ejection,
returning to the horizontal conditions, and water supply can be checked by test switch. When test function performs
normally, buzzer sounds and water supply shall carry out. Check it for repair if buzzer does not sound.
4. When water supply is completed, the cycle operates normally as follows: Ice making
horizontal conditions * Water supply
• Ice ejection • Returning to
5. Remove ice from the ice maker cube mould and press test switch when ice maker cube mould is full of ice as ice ejection
and water supply control do not work when cube mould is full of ice.
2-6. Other
functions
relating
to freezer
compartment
door opening
1, When freezer door is open, ice dispenser stops in order to reduce noise and ice drop,
2. When freezer deer is open during ice ejection and cube mould returning to horizontal condition, ice ejectk_n end cube
mould level return proceed,
3 When freezer door is open, geared motor and cube ice solenoid immediately stop and duct deer solenoid stops after 5
seconds.
4. Water dispenser stops in order to protect water drop when freezer door is open.
5. Test function operates normally irrespect of refrigearator compartment door opening.
- 60 -
ICEMAKER
AND
DISPENSER
OPERATION
PRINCIPLE
ANDREPAIR
METHOD
3. Ice Maker 1¥oubleshooting
* Troubleshooting: ff is possibleto confirm by pressingfreezer and refrigeratortemperature controlbuttons for more
than 1 second,(ice maker is normalif all leds are on): referto trouble diagnposisfuncUon in MICOM
function 2-8 (page 18)
_
Change main PWB I
Failed DC Power
• Check DC power (5V, 12V).
es
_l__kg
_
-Sensor
Replace ice making
Failed ice making sensor
_
I
• Check the resistance of
both ends (1,2) of ice making
I NO
. D_e_eSc°trs°bf
etCwOeNe_
ice making
sensor and board
<
Is Crus_.d
I
Failed Ice Maker Unit
iLnED_ dku:_
_
9,10 of ice ejection motor of
f
No
/
ejectionand level return
normalwhen test switchis
"_
pressed for more than 0_5second?
"_.
Does the bell
./"
Replace Ice Maker Unit I
• CON9 between 18 and 22.Q?
is ice ejection motor drive circuit
(IC11 and peripheral circuits)
normal?
• Defects between Hall IC and
Board (Pin No. 42 of ICl).
• Confirm ice ejection and level
return when pressing
test switch.
No
Replace Main PWB
I
Failed ice maker unit test switch
_'_
Replace Ice maker Unit I
• Are both ends 5,6 of CON9
test switch open?
• Defects between test switch
and board (Pin No. 43 of IC1).
• Are both ends (3,4) of CON9
ice maker stop switch short?
Poor water supply
• Is power applied to water
supply valve?
• Does the water supply
valve work nerma[ly?
• is the water suppiy line
normally connected?
Normal
I
- 61 -
Replacevalve
water
supply
I
ICEMAKER
ANDDISPENSER
OPERATION
PRINCIPLE
ANDREPAIR
METHOD
4. Ice maker circuit part
_mM1
P64
60
r--q
1B.2Kg
R52
CON9
ICE MAKER SENSOR
(A_N4)
T,o.!
2,
t=
104_
R53
_"
P40
CCZS_
104/T
7
43
R55
P42
cc2_
STOP S/_/
iCE MAKER
TEST SIW
104._
P41
42
R57
CC27_
IC1
___1
104 _
CE HAKER
(MICOM)
P43
p44
4+
R59
R60
4,7
4.7)<
45
_
(Forwo,
pd )
(Reve'P_;e)
5
6l
/
/2_'iR_l
2
i
4
ICE MAKER
ICll
T CM4
_3/Ioov H
MOTOR
BA6222
The above ice maker circuit is applied to the R S65DQG/DSG, R-S65DRG
at the freezing room and the ice maker driving part of the main PWB.
and consists of the ice maker unit part installed
Water supply to the ice maker container is done by opening the valve for the established water supply time by operating the
container via a solenoid relay for the ice valve of the solenoid valve placed at the M/C room. If the water supply time is
elapsed, water supply is automatically stop. This circuit is a circuit for implementing function such as ice removal, ice-full
detection, horizontal balancing and sense of ice-making temperature for the ice-maker container.
temperature sense is same as in the temperature sense circuit part of the main PWB, refer to it,
Test switch input detection of the ice-maker
is same as in the door switch input detection circuit of the main PWB.
1. This function is used in operation test, service execution and cleaning etc and performed
installed at the automatic ice-maker itself for more than 0.5 second.
2. The test switch operates
Since ico-making
if pressing the test switch
in the horizontal status and test function is not input in the water supply operation.
control and water supply control is not performed
Ice removal
if full-ice is arrived during the operation of test function.
3. If pressing the test switch for 0.5 second or more in the hodzontal status, ice removal operation is immediately
performed
irrespective of the generation conditions of ice at the ice-making tray. Therefore, care is required since water may
overflow ff operating test function in the water state that ica-making is not done. A cycle of water supply is performed
the horizontal balancing
operation,
operation
after ice removal operation. Therefore,
horizontal operation and water supply, In this case, if test function is normally performed,
rings and water supply control is performed. Thus, no ringing of"Ding~"
must be performed.
4. If water supply is completed,
•., water supply",
operation
"Ding~" buzzer sound
buzzer sound means failure and repair check
in the normal cycle of "ice making * ice removal
- 62 -
in
you can check any problem of ice removal
returning to horizontal status
CIRCUIT
CIRCUIT DIAGRAM
G R-P (L)207,247* RA(QA) CN=o_
• HCMEBARPART(H/tL'_HEATER,DOORS4W)
CAPACITOR
PART,THE PLUG1YPE,
comeEsso.
FAFrrH
eA.X
PWBASSEMBLY,MAIN
PILOTVALVEONCIRCUITDIAGRAM
ARE
SUBJECT
TO CHANGEIN
DIFFERENTLOCAUTESAND
co_ _o_
F_F_
_OR_LDC)
• N : NEUTRAL
BL
FUSEPkR'r
_gGNHL(GN)
F-DOOR S/W
BU,
N)
BLIN_
D
YI.
BL
F-_P
CAPACITORPART
PB_'nON
DEFROST_I_OR
F. ---7
; _L_%E
_
,_E.._
BAR'
COMPRESSOR
EARTHPART
P.T.C ASSY
BI_
PERCEPTION
HEATERSHE£T
Wt'l(k0
YL
DISP-LAMP
O _....
RD
MOTOR
l PILOT
V_.V
s
BL
_-_-._._--_
ICE MAI_R
TE_
_
BL
BL
iCE MAH_R
BO
BO
DISPENSER
DISPENSER
LEVER St#
ICE MAKER
PWB ASSEMBLY,sensOR
DISPLAY
R-DOOR S/W
_
EOI.ENO_D,
CON4
R-LAMP
PR
_:--_
BL
SOLENOID,
WH_
COt_
SB
WH_
3 IRD
• RJSEPART
APPUCA_0N(0PTIONAL)
FUSE
NO FUSE
_YWOfl:VaWB_U
BL
250MAC 15A
_:V_Ce_
HEATER,PLAIZ-_W/fI_'O
Fq_pUflPLl_
:_
_:em0K_e_
W_itb_4nl_
:_a
suwaeuJ_,_:K,_v_s
- 63 -
M_ _pdl_
_ee,4_me_
o
•
_
I
CIRCUIT
DIAGRAMME DE CIRCUIT
G R-P(L)207,247*RA(QA)<No, e_
• PARllE BARD'APP/_
_R lY/_,MtTBCENT_ FORIE SM), Pi_T1E
co_.,_nc_w_Au_
GROUPE PWBPRINCIPAL
TERREDUCOMPRESSEUR,
VN4NE8PILOTES
SURLESCHEMAELr=c'rR_QUE
SOre
SUSCEPTBLES
DE MODIRCATION$
DANS
FU,SB_PkR1]E
[_
BL
tD
CONTACTPORTE-F
LAMPE-F
S,WNIVEAU
DISTRIBUTEUR
BL
PR
BL
RD
-64 -
TROUBLE DIAGNOSIS
1. TROUBLE
SHOOTING
CLAIMS.
1. Faulty start
CAUSES AND CHECK POINTS.
1) No power on outlet.
* Measuring instrument
Multi tester
2) NO power on cord.
Bad connection
HOW TO CHECK
between adapter and outlet. (faulty adapter)
-The Inner diameter of adapter,
The distance between holes.
-The distance between terminals.
:
• Check the voltage.
If the voltageis within ±85%
of the rated voltage, it is OK.
• Check the terminal
-The thickness
of terminal.
Bad connection
between plug and adapter (faulty plug).
movement,
The distance between pins,
Pin outer diameter.
3) Shorted
start circuit,
Nopoweron
power o_d.
.Disconnectedcq_oefwk&
i
"_nternal _
[- Powefcord isdiscomected.
L Faultysotdenng.
shot
Loose co_lauL
• Check both terminals of
power cord.
Power conducts
: OK.
No power conducts : NG
- t.agedistance
between
rna_ termS.
- ]'binferna_termina!.
Terminal_.
-Bads_=ve
as_rnUy.
•_.
F Weak cmnec_on.
c Worn out_0olblade.
O.LPisctf.
-Capadty
ofO.LPissm_.
.Chal_
ofO.L.Pisbad.
•Bad_.
Power
is
-Inne_
NkO/,,_re
I:_ows
out.
disconnected.
- Bedintemat
c_Jon.
• Checkbothterminals
of
O.LP.
Ifpowerconducts: OK.
Ifnot :NG.
Faulty
terrnk'elcau_ng(Cuwireiscut).
- Bedsok_ng.
Noe4ectdc
poweron compress_.- Faultycomlxessor.
=FaultyPTC.
_werdoes
r_ conduct
- [_aoe
- Badchaa(:tel_.- lt_ res_a,_eisb_
• Check the resistance of both
terminals.
At normaltemperature6 :
OK.
Bedlm'ninal o_ne_n.
If disconnected : oo,
4) During defrost, rStart automaticdefrost"
L Cycle was set at defrost when the refrigerator
was produced.
- 65 -
TROUBLE DIAGNOSIS
CLAIMS.
2. NOcooling.
CAUSES AND CHECK POINTS.
2) Refrigeration
-Moisture
dogged,
HOW TO CHECK
system is clogged.
• Check the dogged
evaporator by heating (as
soon as the cra_kingsound
Residualrnoisture -AirBk)wfng..Notperformed.
inlheeve.porator.
Tcoshort.
-Iml:x:4_tile
rnds4ue
c_:s_rmrmatJon.
begins, the evaporator start
freezing)
Low_ l_essum
Leav_it _ _heai_ [ Du_ingresttime.
L Afterwed<.
- Calmare missed.
- Resi6valmoisture.
- Notdded inthe compressor.
- Elapsedmorethan 6 meethsa_erd_n9
Capsa_.
- No pressurewhen ihs open.
- No elec_ic - InsolVent cbier
power on
capadty.
thennostat.
[[_ d_r - [N_ tem_re.
LLeEtveitin1heair. Ched( on N
cmdilico.
Good stora_ _ef
trashing.
- Resid_moisture Calmae r_ssed,Flaring_ns,_
I'l
pipe_
• [)LI_
work.
L Perforated.
f Tco sho_t_me.
Lowair pressure,
Lessd[y_ir.
- Moisturepene_a_ - Leaveit in_ ai[- Moisture_.
in_ ther_
oa.
lithe evaporator does not cool
from the beginnig (no evidece
c_ged.
-WeUjoint
- _peg_lm
of misture attached).
i Tmlarg_
Oamaged
p_s
The evaporator is the same
as before even heat is
Tco mudasdda'.
applied.
- 1_e cal_la'y tube_=r_ed deplh. -Tco much,
- D_-c_gein_, - Calwlay
tuber,m+_
- Ove_
heat
c_n
_.
_cmnt powder.
f WeU o:_des.
- R_u_ed o'_'_ s_on byc_ng. - Sqcoezed.
- Fox.j) m_tedBIdo_ging.
_Compress_"cap is disconnected.
Foreignmaterialsare in I_epipe.
- 66 -
TROUBLE DIAGNOSIS
CLAIMS.
3. Refrigeration
is weak.
CAUSES
1) Refrigerant Partly leaked. _
2) Poor defrosting
AND CHECK POINTS.
HOW TO CHECK
weUjointleaK
Partsk_k.
capacity.
Drein pa_ (pipe) dogged.
• Check visually.
- _lect P/U intodrain hose.
InjectIhr_
hole.
'€_e
- Sealwithdrain.
- Fore_mater_ - P/U_np._
peneta_a.
- Screwinput
- O_erf_em rnater_
Cap drainis not dis_nne_ed.
Defro_hnat_dc_snot --
gener_e
he_
-Rate
d_connac_d,
bea_
- V_reiscut
-Hea_ngw_e.
-Con_po_t
be_een
h_r_
• Check terminal
Conduc_n: OK.
If wire is not cut, referto
resistance.
-- Poetterminalcon_,acts.
P=Power
-Co_ - V_re_o_
he_er
- Leadvire,
- Heae_w;re.
-Contactpo_t
between
hea_:j a_l
elec_wire.
- Hea_ng
wire_scormbed
-Wa_ pene_a_on.
- B_dtemin_c_ec_.
- 67 -
No conduction:NG.
- Dent
by_nevapora_
andelec_c
wie.
V=Voitage
R=Resistance
R
R=_
_
P
TROUBLE DIAGNOSIS
CLAIMS.
3. Refrigeration
is weak.
CAUSES AND CHECK POINTS.
HOW TO CHECK
-Residual - We_ he_tfrom heata'. [- SheathHeater- rated.
frost
_He_e_m-_te_.
• Heaterco_14_
- rated.
Badheater
asserrbly.
L Heaterplate i Nocontact_ drain.
cord.
Heatercord4.- oosened_opperLNotcontacttolh
e
evapora_
pipe.
Loca_on
of assembly
(topandm_e).
Tcoshort_
Defr_ Set,sot.
lirne.
- Faulty_.
Se_-D(miss_g,
_ca_on.
tfid_ess),
Gasketgap.
- b-_ructural
fa_l. i Air inflowll.._oug__hefan moto_
L _
insulB_fl
of i_se
dool'.
-No automa_ def_ng.
Defrostdoesno_retum,
3) Cooling air leak.
-Badgasketadhes_n
f _a_adTnont,
L_.
-Doorsag. Badadhesi_,
E Weakbird_ for_athinge.
4) No cooling air circulation.
Faultyfanrno_.
-Fanrno_.
-Doorswitch.
II Check the fan motor
conduction:OK.
-Self_d_ed.
W_is cuL
- IBad_rmi_ mntacl.
No conduction:NG.
-Fa,Jits. --Contacldislance.
-- Bultm i_essure.
-- Meltedconlad.
-- Con'ca¢_
Re_gemtor
andfreezer
switch
re,,e_M.
- Butlon isnot pressed., - Poordoor
attad'w_ll.
- Door Iner
- C_frac_onir_er
i_er.
- M_t
Badtorminal
- P/Uliquidleak.
- 68 -
TROUBLE DIAGNOSIS
CAUSES AND CHECK POINTS.
CLAIMS.
3. Refrigeration
is weak.
HOW TO CHECK
4) No cooling air circulation.
Faultyfan motor. -- Fan is
i- FanshroudcontadL- Clearance.
turbaned.I- Damp_evapora_
cor_act
'- Accumulatedresidualfrost.
Small cooling air -- I_t
Fanoverload,- Fan_.
discharge,
mot_ RPM _ Bad _w tenn_att_
_:SMd_te_:s,
_- Ratedpowermisuse.
L Low'_ago.
-- Fau]tyfan, l-Fan misuse.
l_d shape.
Loose connec_on.
- NCt_Igh_connected,
L]nserldepth.
-- Shone.
BanL
-- Iceandf_gn
5) Compresaor
capacity.
_
m _
p_ts.
F Ralbgmisuse.
srn_
mmoly.
L
6) Refngerant
LOW
V_.
i- Maifunc_anofd'_'_ng cylind_
too much or too little.
_ _%of_e_..Fa_ymmpmssor
'
7) Continuous operation
- No contact of temperature controller. - Foreign materials.
• Check visuallyafter
disassembly,
8) Damper opens oontinuousiy.
i
Foreign matedals
jammed.
[-- pM r_t_ldump.
_ EPS watersed_t
Failed sensor, - Positlon
L_ Screw,
of sensor.
'_ Characteristics
of damper.
r Bad characteristics of its own temperatue.
_-- Parts misuse.
L
Charge of temperature - Impact.
characteristics.
9) Food stodng place. - Near the outlet of cooling air.
- 69 -
• Check visually after
disassembly.
TROUBLE DIAGNOSIS
CLAIMS.
4. Warm
refrigerator
compartment
CAUSES AND CHECK POINTS.
HOW TO CHECK
1) Colgged cooling path.
EPJU_
Fofe_nmatedais.-PIUdump 14quid.
temperature.
2) Food storate. _
5_ No automatic
operation.
(faulty
contacts.)
S_orehotfood.
Storeice muchat once.
1) Faulty temperature sensor in freezer or refrigerator compartment.
[ Faerycmta_
and check visually.
FaJltytemperaturecharacteri_cs.
2) Refdgeratioo
load is too much,
Foed, - Toomuchfood.
L Hodood.
Freque_openinganddosing.
Coolairleak.
Poordoordose,- Pa_ opens.
3) Poor insulation.
4) Bad radiation.T
5) Refrigerant
Higharrbie_ttempecatu_.
_- Spaceissecluded.
leak.
6) Inadequate of refrigerant.
7) Weak compressor discharging
power. 7--
Differentra_
8) Fan does not work.
9) Button is positioned
6. Dew and
ice formation.
1) Ice in freeezer
-External air _
at "strong."
compartment.
-- Rul_sermotorassemblydirec_reveme).
Doormens
F We_doordosing
po_e_
b_notdoses.
_ Stoppermaifunc_on,
Gaparoundgasket-- _,
distur_on,
Ioo_ doertw_ted,ormernut
fuly inserted.
-Foodvapor.-- St_ng hotfood.-- Unsealedfood.
2) Condensation
Door opens
in the refrigerator compartment.
[but nutcloses. _
D_ sag.
do_
_ In_
Foodtm_rs
_
dcsi_.
LGas_Stgap,
3) Condensation
-Cool airk_k
on liner foam.
F Notfury_led _- Tooptablepart
andVan._it_d._
• Inspect parts measurement
L=0_te _ part
L- _gap.
- 70 -
TROUBLE DIAGNOSIS
CLAIMS.
6. Dew and
ice formation.
CAUSES AND CHECK POINTS.
HOW TO CHE
4) Dew on door,
-- Dew on the duct door. - Duct door heater is cut.
-- Dew on the dispense
recess.
F RecessHeateris cut
L Ductd_r isq0en./ Fore_nrnaterialdogging.
-- Dew on the door surface.
-- Dew on the --gasket surface.
_-Not fully filled. T Surfaco._
Cormer._L P/U liquid contraction. _
Uq_sl_
. .
L_le_
Badwingadhesion. F Wing sag(lower
part).
L Doorfinershape mismatch.
Comer --_Too
much notch.
_B_oken.
- HomeBer heateris _L
5) Water on the floor.
Dew in the refrigerator
compartment.
-- Defrestad water overflows.
-- Discharging
location.
hose --
-- Tray drip.
--
Clogged discharging
Evaporation
_
hose,
tray located at wrong place.
Damaged.
Breaks, holes.
Small Capacity.
-- Position of drain.
7. Sounds
1) Compressor
--
compartment
Compressor
inserted.
sound T
L
operating sounds.
Sound from machine itself.
Sound from vibration.
- Restrainer.
Rubber- - Too hard.
seat.
- Distorted.
- Aged.
- Burnt.
- Stopper.
Bad Stopper
Not fit
assembly.
(inner
diameter
of stopper).
-_lted,
-Not
- Compressor base not connected.
- Bad welding compressor stand(fallen).
- Foreign materials in the compressor
compartment.
--
O.L,P. sound.
--
Capacitor
noise.
Pipe sound.
---
Chattering sound.
Insulation paper vibration.
- Pipe contacts each other. - Narrow interval.
- No vibration damper. _ Damping rubber-Q.
Damping rubber-S.
-Capillary tube unattached.
-71 -
'
TROUBLE DIAGNOSIS
CLAIMS.
7. Sounds
CAUSES AND CHECK POINTS.
1) Compressor
compartment
HOW TO CHECK
operating sounds.
--
Transformer sound. _[_
L_
Itsown faulL-- Core gap.
Badconnec_n.-- conect s_ew co_ec_x
--
Drip tray vibration sound -Bad asserr_y
DistorlJan,
Fore_nmaterials
inside.
--
Back cover machine sound. T
Bad _n
--
Condenser drain sound.
Not cannected.
_
Badpipecaulking.
2) Freezer compartment
--
sounds.
Fan motor sound. 7-- Nom_ opera,rig sound.
L
--
Vibre_onsoand._--
_ed rui0bers_t.
Badtorquefor assere_
bracket.
rno_-
Bounds from fan - -- Fanguidecontact
contact.
-- Shroudburrconlact.
-- Dampingevaporatorcer_dL
-- R_
Unbalance fan sounds_
frostoontacLT
Unb_
--
PcorVea_ne_ Co_dheate_
L-- Narrew_inte_vaL
Surfaazmanhir_ngcondi_.
- Fan_.
Missy.
B_T.
-- Icean thefan.-- Air intake(oppesitetomotor
rebberassemUy.)
--
Motor shaft _
contact sounds.
--
Resonance.
--
Evaporator noise.-
Supporter_ed.
T_teddumgmctorassembfy,
Eval:x:xa_r
p_ecantact,
-- NOdarnp_geval:x3cat0r.
-- Soundfromre_jerar_-- S_air_ess
ste_pi0eshoe in
an_m_a_
--Sound_ _n_
andpipe
dunng
expensa_
andcantred_n.
3) Bowls and bottles make contact on top shelf.
4) Refrigeratorroof contact.
5) Refrigerator side contact.
6) Insufficient
Lubricants on door hinge.
- 72 -
TROUBLE DIAGNOSIS
CLAIMS.
8. Faulty lamp
(freezer and
refrigerator
compartment).
CAUSES AND CHECK
POINTS.
1) Lamp problem.
]L_
Filament blows out.
Glass is broken.
2) Bad lamp assembly.
_L_
Not inserted.
Loosened
HOW TO CHECK
by vibration.
3) Bad lamp socket.
--Disconnection._
Bad soldedng,
Bad rivet contact.
--Short.
Water penetration;--
Low water
level
--Bad
in tray.
elasticity of contact.
-- Bed contact(sorrosion).
4) Door switch.--
--
Its own defect.
Refrigerator and freezer switch is reversed.
9. Faulty internal
voltage(short).
---
Travlel distance.
Bad connection.
--
Bad terminal
--
P/U liquid leak..
contact.
1) Lead wire is damaged.
-Wire
M Connect conduction and
damage when assembling
P.T.C. Cover.
non.conductionparts and
check with tester.
- Outlet burr in the bottom plate.
- Pressed by cord heater, lead wire, evaporator
2) Exposed terminal.
_ Compressor
pipe.
Resistances: OK.
Compartment
Freezer compartment
3) Faulty parts.
terminal. - Touching other
components.
terminal - Touching evaporator
Conduction: NG.
pipe.
- Transformer. _
Coil contacts cover.
_Welded
terminal parts contact cover.
- Compressor. -Bad coil insulation.
-- Plate heater.
Melting fuse. --- Cord heater.
T
L
Sealing is broken. --
Moisture
penetration.
Pipe damaged. -Bad sealing.
Moisture
penetration.
-- Sheath heater.
-73-
TROUBLE DIAGNOSIS
CLAIMS.
10. Structure,
appearance
and others.
CAUSES AND CHECK
POINTS.
1) Door foam.
Weak
to_qea
of _
Boriskx)seaed
dung
hingeceanectiea,
transpor_on.
_--
N__
f=teead.
L-- Screwwom eat,
Sag.--i
Noise dudng
operation.
Weakgasket -adhesion.
A_esion s_ffaea.
Fb_dtape.
Not we_fixed.
Hingeinterim.
_
I_
Biggerdoor f_{_
Hinge-PintJ_ed-Po(zflatqess,
I-- No washer,
L-- NOg_easeand eatenough
qean_y.
Malfunction. _-
NotdosedInterference
betweendoer _ne"and inner
t_.Re_
-cornmm',ent
is
7-Smpperwornout
_- Badfreez.er
c_npaWn_t
doer
openadv_n_zef| ass_,b_
compar_nent
is
L- No stoppe_
deaad
(_Rysto_).
2) Odor.
-Temperature of-- Hk311.
_
refrigerator
I_
compartment.
L_
Faulty
darnpereaatml.
_
issetat"weak".
DooriSopen(interference
by
food).
-Deodorizer. _
_
Nodeodadze_.
Poorcapadty
- Food Storage. 7-
Seal ceadi_on.
L_ Longterrn storage.
-Others.
Odels from chemiealpmcucts.
- 74 -
HOW TO CHECK
2. Faults
2-1. Power
Causes
Problems
Checks
No power on
- Power cordcut.
- Check the voltage with tester.
-Replace the components.
outlet,
- Faultyconnectorinsertion.
- Check visually.
-Reconnect
• Faultyconnectionbetween plug
Remarks
Measures
Check visually.
the connecting parts.
Reconnect
the connecting
parts.
and adapter.
Fuse blows out.
• Short circuit by wrong connection.
• Low voltage products are
connected
to high voltage.
• Short circuit by insects,
• Electricity leakage.
• High voltage.
- Check the fuse with tester
;- Find and remove the cause of
problem(ex,
or visuafiy.
- Check the input volt are with tester
(between power cord and products)
- Check the resistance
short, high voltage,
low voltage).
- Replace with rated
fuse after confirming
its specification.
Replace with rated fuse.
• If fuse blowns out
of power cord
frequently, reconfirm
the cause and prevent.
with testerf (if it is 0_, it is shorted).
• Short circuit of components
(tracking due to moisture and dust
s
penetration).
2-2.
Compressor
Problems
Compressor
Causes
- Faulty PTC.
Checks
Measures
- If resistance is infinite, replace it
- Check the resistance.
does not
Vlaue:_
Remarks
with new one.
is defective.
operate.
- If it is not infinite, it is normal,
- Check other parts.
- Compressor
is frozen.
- If compressor
assembly
normal(capacitor,
parts are
PTC, OLP),
apply power directly to the
compressor
to force operation.
Auxiliarywinding
-__
OLP
It starts as soon as it is
contacted.
- During forced operation:
* Operates:
Check other parts.
- Not operate:
Replace the frozen
compressor with new one, weld,
evacuate, and recharge
refrigerant,
• Refer to weld repair procedures.
o
2-3, Temperature
Problems
Causes
High
Poor cool air circulation
temperature
fan motor.
Measures
Checks
due to faulty
- Lock -- Check resistance
with a
Remarks
- Replace fan motor.
tester.
in the freezer
0_: short.
compartment.
_o_: cut,
-Reconnect
and minsert.
Ill
Rotate rotor manually and check
_o
rotation.
- Wire is cut.
Bad terminal contact: Check
Maintain clearance and remove ice
termfoal visually.
(Repair and/or replace shroud if fan
- Fan constraint. - Fan shroud
contact: Confirm
is constrained by shroud
deformation).
visually.
- Fan icing:
Confirm visually.
03
Faulty fan motordue to faulty door
switch operation,
- Iced button (faulty) operation:
Press button to check
- Confirm icing causes and repair.
- Replace door switch.
- Faulty button pressure and contact:
Press button to check operation.
- Door cannot press door switch
button: Check visually.
- Door sag: fix door.
- Door liner bent:replace
door or
attach sheets.
Bad radiation conditions in
compressorcompartment.
- Check the clearance
between the
- Keep clearance between
refrigerator and wall (50 mm in
refrigerator
minimum).
50mm).
- Check dust on the gdll in
compressor
compartment.
- Check dust on the coils condenser.
o
and walls (minimum
broken if cleaning
performs whilethe
- Remove dust and contaminants
from grill for easy heat radiation.
- Remove the dust with vacuum
cleaner from the coils condenser
while the refrigerator
- The fan may be
is off.
refrigerator is on.
2-4. Cooling
Problems
High
Checks
Causes
Re_gera_leak.
temperature
Measures
Check seauence
Weld the leaking part, recharge
1. Check the welded parts of the
refrigerant.
in the freezer
drier inlet and outlet and drier
compartment.
auxiliary in the compressor
compartme_
Remarks
the
Drier must be replaced.
F.
(high pressure side).
2. Check the end of compressor
sealing pipe (low pressure side).
3. Check silver soldered parts.
Q
(Cu + Fe / Fe + Fe).
4. Check bending area of wire
o
condenser pipe in compressor
compartment (cracks can
happen during bending).
5. Check other parts (compressor
-.j
compartment and evaporators in
freezer compartment).
Shortage
of refrigerant.
Check frost formation on the surface
of evaporator
in the freezer
compartment.
- If the frost forms evenly on the
surface, it is OK.
- If it does not, it is not good.
- Find out the leakingarea, repair,
evacuate, and recharge the
refrigerant.
- NOleaking, remove the remaining
refrigerant, and recharge new
refrigerant.
Dder must be replaced.
Causes
Problems
High
Cycle pipe is clogged.
temperaturein
Checks
Measures
Check sequence.
1. Check temperature
Remarks
- Heat up compressor discharging
of condenser
manually.
the pipes, and check the clogging.
compartment.
if it is warm, it is OK,
Remove the causes of clogging,
If it is not, compressor
discharging
2. Manually check whether hot line
weld, evacuate, and recharge
the refrigerant.
- If it's warm, it's OK. If it's not,
pipe is warm.
condenser
If it is warm, it's OK.
joints might be clogged.
If it is not, condenser
outlet weld
joints might be colgged.
Direr must be replaced.
weld joints with touch, disconnect
the freezer
joints might be clogged.
Disconnect
discharging
line weld
z
with torch, remove the
causes, evacuate,
and recharge
seal refrigerant.
f
Go
Leak at loop pipe weld joint
Check sequence.
Replace the compressor,
(discharge) in compressor.
1. Manually check whether
evacuate, and recharge refrigerant.
condenser
weld,
is warm, It is not warm
and the frost forms partly on the
evaporator
in the freezer
compartment.
Faulty cooling fan in the compressor
Check sequence.
- Replace if motor does not operate.
compartment,
1. Check cooling fan operation.
o If fan is disconnected,
2. Check that cooling fan is
disconnected
from the motor.
--4
check fan
damage and reassemble
it.
• Refer to fan motor disassembly
and assembly sequence.
Drier must be replaced.
2-5. Defrosting failure
Problems
No defrosting
Causes
Heater does not generate heat as
Checks
1. Check the resistance
Measures
of heater,
the heating wire is cut or the circuit
0_: Short. ,,_2: Cut.
is shorted.
Tens to thousands ._: OK.
1) Heating wire is damaged when
2. Check the resistance
2) Lead wire of heater is cut.
surface.
3) Heating wire at lead wire contacts
O_: Short. _:
is cut.
Seal the lead wire with
• Parts replacement:
insulation
Refer to parts
contraction
explanations,
between
repair.
Cut.
1. Confirm foreign materials.
1. Impurities.
In case i 1) Push out impurities
by inserting
of ice, insert the copper line
copper wire.(Turn
through the hole to check.
3hours and pour in hot water if
2. Put hot water into the drain
(check drains outside).
off more than
frost is severe.)
2) Put in hot water to melt down frost.
3) Check the water outlet.
4) Push the heater plate to sucking
LO
duct manually and assemble
the
disconnected parts.
Gap between Sucking duct and
1. Confirm in the Sucking duct.
1) Turn off the power, confirm
impurities
Heater plata(Ice in the gap).
and ice in the gap, and
supply hot water until the ice in the
gap melts down.
2) Push the Heater plate to drain
bottom with hand and assemble
the disconnected
Wrong heater rating (or wrong
assambly).
parts.
1. Check heater label.
Faults: replace.
2. Confirm the capacity after
- How to replace: Refer to main parts
substituting the resistance
value
into the formula.
p= V 2 (V: Rated voltageof user country)
R (R: Reslstance of tester[_])
--
Compare P and ]avel capacity.
Tolerance: +7%
tape and heat
tube if the cut
lead wire is accessible
Tens to thousands Q: Short.
are clogged:
2. Ice.
Heating wire is short and wire is cut,
housing terminal and heater
inserting into the evaporator.
Sucking duct and discharging hole
Remarks
to
F.
Problems
No defrosting
Causes
Melflng fuse blows out.
Checks
- Check melting fuse with tester. -
1) Lead wire is cut.
If OQ: OK.
2) Bad soldering.
If _2:
Ice in the Sucking duct.
Measures
Remarks
Faullty parts: parts replacement.
- Check wire color when maeasuring
wire is cut.
resistance
1. Check the inner duct with mirror.
1) Icing by foreign materials in the
with a tester.
1) Turn power off.
2) Raise the front side(door side),
duct.
support the front side legs, and let
2) icing by cool air inflow through
the ice melt naturally. (If power is
the gap of heater plate.
on, melt the frost by forced
3) Icing by the gap of heater plate.
defrosting.)
2. Check by inserting soft copper
3) Reassemblethe heater plate.
wire into the duct (soft and thin
copper not to impair heating wire).
Bed cool air inflow and discharge,
f
co
O
and bad defrosting
due to faulty
1. Turn on power, open or close the
door, check that motor fan
contact and insertion (bad connector
operates (If it operates, motor fan
insertion into housing of heater,
is OK).
melting, fuse and motor fan).
2. Disconnect
housing and reassemble
assembled
of
wrongly
parts.
2) If the parts are very damaged,
parts in the refrigeratol
compar'(ment, check the connection
around the housing visually,
defrost, and confirm heat generation
on the heater. Do not put hands or
the sheath heater.
3. Check the parts which have faults
described
1) Check the faulty connector
in 1, 2 (mechanical
model: disconnect
from the assembly).
thermostat
remove the parts and replace it
with a new one.
F.
2-6, Icing
Problems
Causes
Icing in the
1) Bad circulation of oool air,
refrigerator
- Clogged intake port in the
compartment.
refngeretor compartment.
- Damper icing.
- Sealing is not good.
- Pipe icing.
- Too much food is stored and clogs
- Discharging
pipe icing.
the discharge port.
- Bad defrosting.
Checks
Measures
- Check the food is stored properly
(check discharge
and intake port
are clogged).
- Check icing on the surface of
Remarks
- Be acquainted with how to use.
related parts if problem
- Check the damper and replace
is caused by faulty
it if it has defects.
defrosting.
baffle and cool air path (pipe) after
Check defrost. (After forced
dissembling
defrosting,
check ice in the
evaporator
and pipes.)
the container
box.
Check icing at intake ports of
- Check the defrost
- Sealing on connecting parts.
freezer and refrigerator
compartment.
2) Faulty door or refrigerator
compartment.
- Check gasket attached conditions.
- Check door assembly conditions.
- Faulty gasket,
- Correct the gasket attachment
- Replacement
should
be done when it
conditions and replace it.
- Door assembly and replacement.
cannot be repaired.
- Faulty assembly.
3) Overoooling
in the refrigerator
- Check refrigeratorcompartment
- Replace faulty parts.
is ovemooled (when button
compartment.
- Faulty damper in the refrigerator
pressedon "weak").
- Check partsare faulty.
compartment.
- Faulty MICOM (faulty sensor)
4) Bad defrosting
- Check frost on the evaporator
- Heater wire is cut.
after dissembling
- Defective defrost sensor,
grille.
- Defrosing
cycle.
shroud and fan
- Check parts related to defrosting.
- Check defrosting.
evaporator
(Check ice on the
on the evaporator but
can be sucked into the
and pipe.)
- Check ice on intake port of freezer
and refrigerator
- Moisture cannot frost
compartment.
refrigerator,
being
condensed
and iced,
interferes with cool air
5) Customers
are not familiar with
this machine.
closing.
- Door opens.
- High temperature,
and high load.
- Check food interferes with door
- Check ice on the ceilings.
high moisture,
- Be acquaintedwithhowto
use.
circulation,
and
suppresses
sublimation.
o
Problems
Jce in the freezer
Causes
Checks
1) Bad cooling air circulation.
Intake port is colggedin the freezer
visually.(Check
- Surface of fan
compartment.
and discharging
grille.
compartment.
clogging at intake
port of cooling air.)
- Discharging port is Clogged.
- Too much food is stored.
- Check food occupation
- Bad defrosting.
- Check frost on the evaporator
' - Cool air
volume(Less
dissembling
discharging pert
- Be acquainted
- Check food storage conditions
compartment.
- Wall of freezer
Measures
ratio in
Remarks
with how to use,
- Check defrost (Check ice on the
evaporator
and pipes after forced
defrosting).
- Check the parts related
to defrosting
if the
problem is caused by
the faulty defrosting.
than 75%).
after
shroud and fan grille.
- Check icing at intake port of
- Basket(rack)
refrigerator
compartment.
area.
Food surface.
- Icing in the
shute.
f
Co
2) Bad freezer compartment door
. Faulty gasket
- Check gasket attachment
- Correct the gasket attachement
conditions,
- Faulty assembly
3) Over freezing
conditions
- Check door assembly conditions.
in the freezer
compartment.
Refrigerator
operates pull down.
and replace it.
- Door assembly and replacement,
-Replace defective parts.
(Check if it is operated
- Faulty MICOM.
intermittently)
- The Temperature of freezer
compartment
is satisfactory,
but
over freezing happens in the
refrigerator
compartment
even
though the notch is set at "weak",
4) Bad defrosting.
- Check frost on the evaporator
after
- Check parts related to defrosting.
- Heater wire is cut.
dissembling
- Faulty defrost sensor.
Check ice on the intake port in the
evaporator
- Defrosting
refrigerator
defrosting.)
cycle
5) User is not familiar with how to
usa.
compartment.
- Check food holds door open.
- Check ice on the ice tray.
- Door opens.
- High moisture
shroud and gdlie.
food(water)
is st_ed.
- Check defrosting.(Check
ice on the
and pipes after forced
- Be acquainted
with how to use.
- Replace when it can not
be repaired.
--4
2-7. Sound
Problems
"Whizz" sound
Causes
;1. Loud sound of compressor
operafion,
Checks
Measures
1.1 Check the level of the
1) Maintain horizontal
refrigerator,
Remarks
level.
o
2) Replace rubber and seat if they
1.2 Check the rubber seat
are sagged and aged.
conditions (sagging and aging).
3) Insert rubber where hand contact
reduces noise in the pipe.
2. Pipes resonat sound which is
connected
to the compressor.
2.1 Check the level of pipes
connected
4) Avoid pipe interference.
to the compressor
and their interference.
motor.
2.2 Check rubber inserting
conditions
5) Replace defective fan and fan
6) Adjust fan to be in the center of
in pipes.
bell mouth of the fan guide.
2.3 Touch pipes with hands or screw
-dnver (check the change
of
7) Leve a clearance
interfering
parts and seal gaps in
8) Reassemble
sound in the freezer
compartment.
3.1 Check fan insertion depth and
blade damage.
3.2 Check the interference
structures.
3.3 Check fan motor.
3.4 Check fan motor rubber insertion
and aging conditions.
4, Fan operation sound in the
compressor
compartment,
4.1 Same as fan confirmation in the
refrigerator.
4.2 Check drip tray leg insertion.
4,3 Check the screw fastening
conditions at condenser and
ddp tray.
the parts which make
sound,
9) Leave a clearance
with
o
(/}
the structures,
sound).
Co
3, Fan operation
between
if evaporator
pipes and suction pipe touch
freezer shroud,
Causes
Problems
Vibration sound. 1, Vibration of shelves and foods in
("Cluck")
the refrigerator.
in the compressor.
compartment.
3. Compressor
Measures
1-1. Remove and replace the
shelves in the refrigerator
2. Pipes interference and capillary
tube touching
Checks
1-2. Check light food and container
on the shelves.
_. Moving wheel vibration.
.5.Other structure and parts
vibration.
compartment
with hands.
2-2 Check capillary tube touches
cover back.
3-1 Check compressor
the vibrating parts
and insert foam or cushion where
vibration is severe.
2) Leave a clearance where parts
2-I. Touch pipes in the compressore
stopper vibration.
1) Reassemble
Remarks
interfere with each other.
3) Reduce vibration with rubber
and restrainer if it is severe.
(especially,
stopper
vibration.
compressor
4) Replace compressor
and pipe).
stopper if it
vibtates severely.
4-1 Check vibration of front and rear
moving wheels.
5-1 Touch other structures
and parts.
J
Co
4_
Irregular sound.
("Click").
1. It is caused by heat expansion
and contraction
of evaporator,
1-1 Check time and place of sound
souses.
1) Explain the principles of refrigeration
and that the temperature difference
shelves, and pipes in the
between operation and defrosting
refrigerator.
can make sounds.
2) If evaporator pipe contactswith other
slructures, leave a clearance between
them (freezer shroud or inner case).
F.
_o
Problems
Sound"Burping"
Chocks
Causes
It happens
when
refrigerant
expands
(almo_ the same at the end of capillary tube.
as animals crying
- Check the sound of refrigerant at the
initial installation.
- Check the sound when the refrigerator
sound).
starts operation after forced defrosting.
- Check the restrainer attachment
conditionson the evaporator and
capillarytube weld joints.
Measures
- Check the restrainer attached on the
evaporator and capillary tube weld
joints and attach another restrainer.
- tt it is continuous and servere, insert
capillarytube again (depth:t5±3mm)
• Fasten the capillarytube to auG{on
pipes or detach in the compressor
compartment.
- Explain the principles of freezing
cycles.
Waterboilingor
]t happens when refrigerant passes
flowingsound.
orifice in accumulator intemat pipes by
f
Co
the pressure difference between
condenser and evaporator.
- Check the sound when compressor is
turned on.
- Check the sound when compressor is
turned off.
- Explain the principles of freezing cycles
and refrigerant flowingphenomenon by
internal pressure difference.
- If sound is servero, wrap the
accumulator with foam and restrainer.
Sound of whistle
When door closes, the internal prossure
when door
of the refrigerator decreases sharply
doses.
below atomosphere and sucksair into
the refrigerator, making the whistle
sound.
- Cheekthesoundby openingand
Remarks
- Broaden the cap of discharge hose for
closingthe refrigeratoror freezerdoors. defrostingin the compressor
compartment.
- Seal the gap with sealant between out
and inner cases of hinge in door.
=-
2-8. Odor
,_
Problems
Food Odor.
Causes
Food (garlic, kimchi, etc)
Checks
Measures
* Check the food is not wrapped.
Check the shelves or inner
wall are stained with food juice.
* Check the food in the vinyl wraps,
- Chedk food cleanliness.
Dry deodorizer
Remarks
in the shiny and
windy place.
- Store the food in the closed
container
F.
instead of vinyl wraps.
- Clean the refrigerator
and set
button at "strong",
Plastic Odor.
C,dors of mixed food and plastic
_dors.
- Check wet food is wrapped with
- Clean the refrigerator.
o
- Persuade customersnotto use
plastic bowl and bag.
- It happens in the new refrigerator.
plastic bag or wraps with wet food
or odorous foods.
f
co
o_
Odor from the
deodorizer.
Odor from the old deodorizer.
- Check the deodorizer
odors.
- Dry the deodorizer with dryer and
then in the shiny and windy place.
- Remove and replace the
deodorants.
*Deodorizer : option
2-9. Micom
Problems
Symptom
Causes
Checks
Measures
Bad PCB
AU display
Bad connection
Bad connector
Visual check on connector
Reconnect
electric power.
LEDS ere off,
between Main PCB
connection
connection,
connector.
and display circuit.
PCB to display PCB.
Defective PCS trans.
from main
PCB Trans winding
is
cut.
PCB Trans temperature
DefectivePCB
electric
circuit parts.
Check resistance
of PCB Trans
input and output terminals with
i a tester. (If resistance
Replace PCB Trans
Applicable
or PCB.
model without
is infinity,
fuse is burnt out.
trans winding is cut).
Defective regulator IC
Check voltage at input/output
7812, 7805).
terminals.
Remarks
to
dispenser.
Replace regulator.
Refer to electdc
circuit in circuit
explanation.
PCB electric terminal
Check fuse in PCB electhc
fuse is burnt out.
terminal with a tester.
STR Parts are
Check if STR No. 2 and 3 pins
damaged.
are cut when power is off.
Replace PCB fuse.
Replace parts.
Applicable to
model with
dispenser,
Abnormal
Bad connecBon
Lead Wire connecting
Check Lead Wire terminals
Reconnect Lead
display LED
between Main PC8
main PCB and display
connecting
Wire and directly
operation
and display circuit.
PCB is cut or connector
display PCB with a tester.
terminal connection
Main PCB and
is
contact terminal to
bad.
Defective LED
module.
Defective LED.
connect defective
Lead Wire.
Check if all LEDs are on when
Replace display
Refer to display
Main PCB Test switch is
PCB.
circuit in circuit
pressed (or when both freezer
key and power freezer key are
_ressed at the same time for
more than one second.)
explanation.
rlrl
Problems
Bad cooling.
Symptom
Causes
Freezer
Compressor
temperature is
not start.
does
high.
Checks
Compressor
Lead Wire
Measures
Check compressor Lead Wire
Reconnect Lead
Remarks
is cut.
with a tester.
Wire.
Defective compressor
Measure voltage at PCB CON5
Replace relay(RY1
Refer to load
driving relay.
(3&9) alter pressing main PCB
and RY14) or PCB.
test switch once. It is OK if
driving circuit in
circuit
voltage is normal.
explanation.
Defective freezer
Defective Freezer
Check resistance
sensor,
sensor parts,
sensor with a tester,
of freezer
Replace freezer
Refer to
sensor,
resistance
characteristics
table of sensor in
circuit
Freezer sensor is
Confirm the colo_"of sensor in
Repair main PCB
substituted
circuits (main PCB sensor
sensor housing
for other
explanation.
sensor,
housing).
Defective freezer fan
Fan motor lead wire
Check fan motor lead wire
motor.
is cut.
with a tester.
o Defective door switch
Measure the voltage between
Replace door
Refer to load
(freezer, refrigerator,
PCB power blue line and fan
switch (freezer,
driving circuits in
home bar).
motor after pressing test switch
refrigerator and
circuit
explanation.
co
Go
! Reconnect lead
wire.
• Defective fan motor.
of Main PCB. If the voltage is
home bar).
• Defective fan motor
normal, it is OK.
Replace fan motor.
driving relay.
Replace relay(RY5
& RY6) or PCB.
Faulty defrost.
Refer to faulty defrost items in trouble diagnosis
Refer to trouble
functions.
diagnosis
function.
m
Problems
Bad cooling
Symptom
Wrong
Causes
Defective AC Damper.
Measures
Checks
Check AC damper
Remarks
Check if AC damper motor and
Reconnect lead
wire.
Refdgeretor
motor and reed switch
reed switch lead wire are
temperature,
and lead wire are cut.
cut with a tester.
Check AC damper
Refer to AC damper in parts
Replace AC damper
part,
repair guide.
or refrigerator
F.
contrel
box Assy.
Check AC damper
Refer to AC damper in parts
Replace relay or
Refer to single
Motor ddving relay in
repair guide,
PCB.
motor damper
PCB.
driving circuits
in circuit
explanation.
;o
_D
Foreign materials in AC
Check AC damper baffle
Remove foreign
damper baffles
visually,
materials.
Ice formation on AC
Check if AC damper Heater
Replace AC damper
damper baffles
wire is cut with a tester,
or refrigerator
control
Box Assy.
Defective refrigerator
Defective refrigerator
Check the resistance
sensor
sensor parts,
refrigerator
of
sensor with a tester,
I Replace refrigerator
sensor,
Refer to sensor
resistance
characteristic
table in circuil
explanation,
Refrigerator sensor is
Check the sensor color in the
Repair main PCB
substituted
circuit. (main PCB sensor
sensor housing.
for other
sensor.
housing.)
Defective refrigerator
Check if refrigerator
sensor assembly
is not fixed at cover sensor but
condition.
inner case visually.
sensor
Fix again the
refrigerator sensor.
Problems
Bad defrost.
Symptom
Defrost is not
Causes
Checks
Defrost lead wire is cut.
working,
Defective defrost driving relay.
Defective defrost sensor parts.
Measures
Remarks
Check if defrost lead wire is cut with a
Reconnect Lead
tester.
Wire.
Check the voltage of CON5 (1 and 7)
Replace relay (RY 7
Refer to load
with a tester after pressing main
and RY 14) or PCB.
driving conditions
PCB test switch twice,
check in circuit
If the voltage is normal then it is OK.
explanation.
Check the resistance
of defrost sensor
with a tester,
Replace defrost
Refer to sensor
sensor,
resistance
F.
characteristic
table of circuit
explanation.
i
(,O
Defective
Buzzer
Defective connecting
buzzer
continuously
main PCB to door switch,
switch with a tester.
rings or door
Defective door switch parts.
Refer to door switch in parts repair
opening
lead wire from
alarm
Check lead wire related to door
Repair lead wire,
(/)
Replace door switch.
guide.
does not work.
Defective
Buzzer does
Key input wire is cut or bad connector
display button
not ring and
terminal contact in main PCB and
wire and replace or
circuit in circuit
key does not
display PCB connecting
directly connect bad
explanation.
Check input wire with a tester.
lead wire.
Reconnect
lead
sense even
contact terminal to
button is
lead wire.
pressed.
Key is continuously
structural
depressed
interference.
due to
Disassemble
visually.
frame display and confirm
Adjust or replace
interfering
structures.
_u)
Refer to display
Problems
Symptom
Causes
Checks
Trouble mode indication.
Check trouble diagnosis
Measures
function.
Repair troubles
Remarks
-I
Defective
Buzzer rings
display button,
but key does
Refer to mode
indication in
not sense even
function
button is
explanations.
F.
Check model
_o
pressed.
I Door Buzzer
Suzzer
Defective connecting lead wire from
Check lead wire associated
continuously
main PCB to door switch.
switch.
rings or door
Defective freezer compartment
opening alarm
switch parts.
door
with door
Repair lead wire,
with dispenser.
Refer to door switch in parts repair
Replace Freezer
guide.
compartment door
does not work.
switch.
Bad watedice
lee and water
Defective connecting
dispenser,
are not
Main PCB to lever switch,
lead wire from
switch with a tester.
dispensed.
Defective lever switch parts
Refer to door switch in parts repair guide
Replace lever switch.
Defective photo coupler IC parts.
Check voltage change at photo coupler
Replace photo
output terminals with lever switch
coupler IC or PCB.
Defective relay associated
dispense
with ice
(geared motor, cube and
Check Lead Wire associated with lever
pressed.
It is OK if voltage change is
between
OV- 5V.
Repair lead wire.
Check relay (RY9, RY11, RY12)
Replace defective
with a tester,
relay.
dispenser solenoid).
Defective parts associated
with ice
Check resistance
of parts with a tester.
dispense (geared motor, cube and
! Replace defective
)arts.
dispenser solenoid).
Defective relay associated
with water
Check relay (RY10) with a tester
with water
Check resistance
dispense,
Defective parts associated
dispenser.
Replace defective
relay.
of parts with a tester.
Replace defective
)arts.
TROUBLE DIAGNOSIS
3. Cooling Cycle Heavy Repair
3-1, The Heavy Repair Standards for Refrigerator
NO.
1
Items
Pipe and piping
system opening time.
Welding.
Unit
Min.
Nitrogen
Pressure.
with R134a Refrigerant
Standards
Purposes
To protect
Moisture
Penetration,
Pipe:within 1 houn
Comp:within
10 minutes,
Dhar:within
20 minutes,
Weld under
Nitrogen
atmosphere
(N2 pressure:
0.1-0.2 kg/cm 2)
To protect
oxide scale
formation.
Remarks
The opening time should be reduced to a
half of the standards during rain and
rainy seasons (the penetration of water
into the pipe is dangerous).
-Refet to repair note in each part.
- R134a refrigerant is more susceptible to
leaks than R12 and requires more care
during welding.
- Do not apply force to pipes before and
after welding to protect pipe from
cracking.
- In case of evapc)rator parts, if it doesn't
noise when removing rubber cap blow
dry air or N2 gas for more than 1 rain
use the parts.
Confirm N2 Confirm air leaking
To protect
sounds when
leak.
moisture
)enetration.
removing rubber
cap.
Sound:usable
No sound:not usable
Min.
More than
To remove
Refrigeration Evacuation
Cycle.
t!me
.....
40 m!nutes.
. mois!ure.
.
Vacuum
Tort
Below O.03(ref)
Note:Only applicable to the model
degree
equipped with reverse flow protect
N2sealed parts.
........
I......
EA
High and low
Pressure s des are
evacuated at the
same time for
models above 20_
Vacuum
piping
EA
Use R134a
exclusive
manifold,
To protect
The rubber pipes for R12 refrigerant shall
mixing of i be melted when they are used for R134a
mineral and refdgerent(causes of leak).
ester oils,
Pipe
coupler
EA
Use R134e
cxclusive.
To protect
R12 R,efr_erantmixing.
Outlet
(Socket)
Plug
weighing.
5
Refrigerant
6
Dder replacement.
Leak check.
p!a!e.
.........
Vaccum efficiency can be improved by
, operat ng compressor during evacuation.
vacuum
R134a exclusive.
R134a exclusive
EA
Use R134a
Do not mix
with R12
exclusively.
Weighing
refrigerant,
allowa nce::t:Sg
Note:Wiater:-Sg
Summer:+5g
-Use R134aexclusively To remove
forR134a refdgerator the moisture
-Use R12 exclusively
from pipe.
for R12 refngerator
-Replacedrierwhenever
repairing refrigerator
cycle piping.
Detect
-Do not use soapy
water for check.
refrigerant
it may be sucked
into the pipe by.
leak area.
Do not weight the refrigerant at too hot or
too cold an area.(25°C is adequate.)
Use copper bombe
Socket:2SV plug: 2PV R134a
Note:Do not burn O-dng (rubber) dutll_J
welding.
-Check oil leak at refrigerant leak area.
Use electronic leak detector if oil leak is
not found.
-The electronic leak detector is very
sensitive to halogen gas in the air. It also
can detect R141b in urethane. Please
practice, therfore, many times before use
NOTE) Please contact Songso company on +82-53-554÷2067if you have inquiryon heavy repair special facility.
- 92 -
TROUBLE DIAGNOSIS
3-2.
Summary
Of Heavy
Repair
Process
Contents
Tools
- Cut charging pipe ends and discharge refrigerant from
Filter, side cutters
drier and compressor.
- Use R134a oil and refrigerant for compressor
- Confirm N2 sealing and packing conditions
and drier
Pipe Cutter. Gas welder, N2 gas
before use.
Use good one for welding and assembly.
- Weld under nitrogen gas atmosphere.(N2
gas pressure:
0.1-0.2kg/cm2).
Repair in a clean and dry place.
Evacuate for more than forty minutes after connecting
Vacuum pump(R134a
manifold gauge hose and vacuum pump to high (dder)
exclusively),
and low (compressor
refrigerant
discharging
Manifold gauge.
parts)
pressure sides,
- Evacuation
Speed:113flmin.
- Weigh and control the allowance of R134a bombe in a
vacuum conditions to be :1:5g with electronic
charge through compressor
(Charge while refrigerator
cylinder), refrigerant(R134a)
manifold gauge, electronic
operates).
scales, punching off flier,
- Weld carefully after inlet pinching.
gas welding machine
- Check leak at weld joints.
Electronic Leak Detector,
_
r
scales and
inlet
R134a exclusive bombe(mass
Driver(Ruler).
Minute leak: Use electronic leak detector
Big leak: Check visually or fingers.
Note:Do not use soapy water for check.
- Check cooling capacity
_b Check radiator manually to see if warm.
@ Check hot line pipe manually to see if warm.
® Check frost formation on the whole surface of the
evaporator.
- Remove flux from the silver weld joints with soft brush
or wet rag.(Flux may be the cause of corrosion
and
leaks.)
- Clean R134a exclusive tools and store them in a clean
tool box or in their place.
- Installation
standard
should be conducted
in accordance with the
installation procedure,(Leave
than 5 cm from the wall for compressor
cooling fan mounted model.)
- 93 -
space of more
compartment
Copper brush, Rag, Tool box
TROUBLE DIAGNOSIS
3-3° Precautions
During
Heavy
Repair
Items
Precautions
1. Use of tools.
1) Use special parts and tools for R134a.
2. Removal of retained
1) Remove retained refrigerant
refdgerant.
more than 5 minutes after turning off a refrigerator.
(If not, oil will leak inside.)
2) Remove retained refrigerant
by cutting first high pressure side (drier part) with a nipper and
then cut low pressure side. (If the order is not observed,
oil leak will happen.)
Evaporator
_e
side
3. Replacement
of drier.
4. Nitrogen blowing
welding.
5, Others,
1) Be sure to replace dder with R134a only when repairing pipes and injecting refrigerant.
1) Weld under nitrogen atmosphere
(Nitrogen
pressure : 0.1-0.2
1) Nitrogen or refrigerant
in order to prevent oxidation inside a pipe.
kg/cm2.)
R134a only should be used when cleaning inside of cycle pipes
inside and sealing.
2) Check leakage with an electronic
leakage tester.
3) Be sure to use a pipe cutter when cutting pipes.
4) Be careful not the water let intrude into the inside of the cycle,
- 94 -
TROUBLE DIAGNOSIS
3-4. Practical Work For Heavy Repair
Items
Precautions
1. Removal of residual
Evaporator
Low pressure side
refrigerant.
KEYPOINTING
Compressor
_'_
/
^
_:_/
,J
_
Drier
_ide
R_enser
Intake
Observe the sequence for
removal of refrigerant.
(if not, compressor oil may
leak.)
H._. r-........
1) Remove residual refrigerant
( If not, compressor
I
more than 5 minutes later after turning off the refrigerator.
oil may leak inside.)
2) Remove retained refrigerant
slowly by cutting first high pressure side (drier part) with a
nipper and then cut low pressure side.
2. Nitrogen blowing
Evaporator
welding.
KEYPOINTING
Welding without nitrogen
blowing produces oxidized
scales inside a pipe, which
affect on performance and
reliability of a product.
®
Condenser
Intake
When replacing a drier:
Weld (_) and (_ parts by blowing nitrogen(0, l~0.2kg/cm2) to high pressure side after
assembling a drier.
When replacing a compressor:
Weld (_ and (_ parts by blowing nitrogen to the low pressure side.
Note) For other parts, nitrogen blowing is not necessary
scales inside
because it does not produce oxidizec
pipe becausa of its short welding time.
3. Replacement of drier.
* Unit : mm
KEYPOINTING
Be sure to check the
inserted length of capillary
tube when it is inserted. (If
too much inserted, a
Filter
capillary tube is clogged by
a filter.)
Inserting a capillary tube
Measure distance with a ruler and put a mark(12*3_s0)On the capillary tube. Insert tube to the
mark, and weld it
- 95 -
TROUBLE DIAGNOSIS
Items
Precautions
4,Vacuum degessing.
Evaporator
Suctionpipe
[_
Compressor
Dr_er
BLue
pr
hut
e
Red
KEYPOINTING
- If power is applied
dudng vacuum
degassing, vacuum
degassing shall be
more effective.
Pipe Connection
Connect a red hose to the high pressure side and a blue hose to the
low pressure side.
Vacuum Sequence
Open (_. (_) valves and evacuate for 40 minutes. Close valve O.
5,Refdgerant
- Operate compressor
while charging
refrigerant. (it is
easier and more
certain to do like
this.)
charging.
Charging
sequence
1) Check the amountof refrigerantsuppliedto each model after completing vacuum
degassing.
2) Evacuate bombe with a vacuum pump.
3) Measure the amount of refrigerant
charged.
- Measure the weight of an evacuated bombe with an electronic
- Charge refrigerant
scale.
into a bombe and measure the weight. Calculate the weight of
refrigerant charged into the bombe by subtracting
- ndicate the weight of
an evacuated bombe
the weight of an evacuated
bombe.
KEYPOINTING
- Be sure to charge
the refrigerant at
around 25°C.
- Be sure to keep -5g
in the winer and
+5g in summer
Calculation
of amount of refrigerant
charged
]
the amount of refdgerant charged= a weight after charging a weight before charging (a weight of an evacuated cylinder)
- 96 -
TROUBLE DIAGNOSIS
Items
Precautions
Evaporator
Compressor
Condenser
Bombe
4) Refrigerant Charging
Charge refrigerant while operating a compressor
as shown above.
5) Pinch a charging pipe with a pinch-oft plier after completion of charging.
6) Braze the end of a pinched charging pipe with copper brazer and take a gas leakage test
on the welded parts.
6, Gas-leakage
test
7. Pipe arrangement
in each cycle
* Take a leakage test on the welded or suspicious
area with an electronic
leakage tester.
Check each pipe is ptaced in its odginal
place before closing a cover back-M/C
after completion
o
of work. Particularly
control the size of Joint Drain Pipe
3-5. Standard Regulations
1) Observe
For Heavy Repair
the safety precautions
for gas handling.
2) Use JIG (or wet towel) in order to prevent elec_dc wires from burning
break and accident.)
during welding. (In order to prevent insulation
3) The inner case shall be melted and insulation
case parts.
shall be bumt if not cared during welding inner
matedal (polyurethane)
4) The copper pipe shall be oxidized by overheating
5) Not allow the aluminum
if not cared during welding.
pipes to contact to copper pipes. (In order to prevent corrosion.)
6) Observe that the inserted length of a capillary tube into a drier should be 12 :_ram.
Drier
Molf_tcular Pipe
7) Make sure that the inner diameter should not be distorted while cutting a capillary
8) Be sure that a suction pipe and a filling tube should not be substituted
pump.)
- 97 -
tube,
each other during welding. ( High efficiency
TROUBLE DIAGNOSIS
3-6. Brazing Reference Drawings
PIPEASSY,HOTLINE
(Freezer)
PIPE ASSY, HOT LINE
(Refrigerator)
Copper Brazer
Copper
CAPI-TUBE
DRIER ASSY
Copper
Brazer
PIPE ASSY, SUCTION
Silver Brazer
f
#
Copper
Brazer
CONDENSERASSY,WIRE
Copper Brazer
Copper Brazer
- 98 -
Silver Brazer
Coppper Brazer
TROUBLE DIAGNOSIS
4, HOW
TO
DEAL
WITH
CLAIMS
4-1. Sound
Problems
"Wh LZZ"sounds
Checks and •easurss
• Explain general principles
• All refrigerator
of sounds.
when functioning
properly have normal operating sound. The
compressor and fan produce sounds.
There is a fan in the freezer compartment which blows cool air to freezer and
refrigerator compartments. "Whizz" sounds are heard when the air passes
through the narrow holes into the freezer and refrigerator compartments.
• Cooling
Fan sound in the compressor
compartment.
- There is a fan on the back of the refrigerator, which cools the compressor
compartment. If there is a small space between the refrigerator and the wall, the
air c_rculation sounds may be noticeable.
• Noise of Compressor.
• This operating sound happens when the compressor compresses the
refrigerant. The compressor rotates at 3600RPM. The sound of compressor
operation becomes louder as the refdgerator capacity increases.
"Click" sounds
• Explain the principles
of temperature
change.
• The sounds happens when pipes and internal evaporator in the refrigerator
compartment expand and contract as the temperature changes during the
refrigerator operation. This sound also happens
when the ice on the evaporator melts.
"Clunk"sound
• Explain
that it comes from the compressor
during defrosting, twice a clay,
when the refrigerator
starts.
• When the refrigerator operates, the piston and motor in the compressor rotate
at 3600RPM. This sound is caused by the vibration of motor and piston when
they start and finish their operation. This phenomena can be compared with thai
of cars, When the car engine ignites and starts to rotate, the loud sound
becomes gradually
Vibration sound
quiet. When the engine stops, it stops with vibration.
• Check the sound whether it comes from the pipes vibration
and friction.
• Insert rubber or leave a space between pipes to avoid the noise.
• Fix the fan blade if the noise is due to the collision of fan and shroud.
• Fix the drip tray if it is loosened.
• Sound depends on the installation
location.
• Sound becomes louder if the refrigerator is installed on a wooden floor or near
wooden wall. Move it to the another location.
• If the refrigerator is not leveled properly, a small vibration can make e loud
sound. Please adjust the level of the refrigerator.
- 99 -
TROUBLE DIAGNOSIS
Problems
Checks and Measures
Sounds of water flowing
• Explain the flow of refrigerant.
• When the refrigerator stops, the water flowing sound happens.
This sound happens when the liquid or vapor refrigerant flows from the
evaporator to compressor.
"Click" sounds
• Explain the cbaracteriistics
of moving parts.
• This noise comes from the MICOM controller's switch on the top of the
refrigerator when it is turned on and off.
Noise of ice maker operation
(applicable to model with ice maker)
• Explain the procedure and principles of ice maker operation.
• Automatic ice maker repeats the cycle of water supplying .--*icemaking ...bice
- Noise produced by ice dropping
ejection. When water is supplied, the water sopply valve in the machine room
and hitting ice bank.
- Noise from motor sounds "Whizz _.
freezes to ice, freezing sounds such as "click, click" are heard. When ice is
makes sounds like "Whizz" and water flowing also makes sound. When water
being ejected, sounds like "Whizz" produced by a motor to rotate an ice tray
and ice dropping and hitting ice bank sounds are also heard.
Noise when supplying water.
• Explain the principles
of water supplied to dispenser.
• When the water supply button in the dispenser is pressed, the water supply
valve in the compressor compartment opens and let the water flow to the water
tank in the lower part of the refrigerator compartment. The water is dispensed
by this pressure. When this happens, motor sound and water flowing sound are
heard.
Noise when supplying
ice.
• Explain the principles of ice supply and procedure of crushed ice making in a
dispenser.
o When ice cube button is pressed, ice stored in the ice bank is moved by a Helix
Pusher and dispensed. If crushed ice button is pressed, the cube ice is
crushed.
heard.
When this happens, ice crushing and hitting ice bank sounds are
- 100 -
TROUBLE DIAGNOSIS
4-2. Measures for Symptoms on Temperature
Problems
Refrigeration is weak.
Checks and Measures
• Check temperature
set in the temperature
control knob.
- Refrigerator is generally delivered with the button set at "normal use" (MID).
But customer can adjust the temperature sot depending on their habit and taste.
If you feel the refrigeration is weak, then set the temperature control button at
"strong" position. If you adjust the button in the freezer compartment as well,
the refrigeration is stronger than adjusting refrigerator only.
The food in the chilled drawer is,
not frozen but defrosted
• The chilled drawer does not freeze food.
• Use chilled drawer for storing fresh meat or fish for short periods. For storing for
a long periods or freezing food, use a freezer compartment.
It is normal that
frozen foods thaw above the freezing temperature (in the chilled drawer).
Refrigerator water is not cool.
• Check the water storage location,
• If water is kept in the door rack, please ask to keep it in the refrigerator
compartmest shelf. It will then become cooler.
Ice cream softens.
• Explain the characteristics
of ice cream.
• The freezing point of ice cream is below -15°C. Therefore ice cream may melt if
it is stored in the door rack.
• Store ice cream in a cold place or set the temperature contro! button of a freezer
at "strong" position.
Refrigeration is too strong.
• Check the position of temperature
control button.
• Check if refrigeration is sfrong in whole area of the refrigerator or partly near the
outlet of the cooling air. If it is strong in whole area, set the control button at
°weak". If it is strong only near the outlet of cool air, keep food (particulaify wet
and easy to frozen such as bean curd and vegetables) away from the outlet.
Vegetables
are frozen.
• Check the vegetables storage.
• If vegetables are stored in the refrigerator
shelf or chilled drawer instead of
vegetable drawer, they will be frozen. Set the control button at "weak" if they are
also frozen in the vegetable drawer.
The food stored at inside of
the shelf freezes even the
contre] button is set at "MID".
• Check if food is stored near the outlet of the cooling air.
• The temperature at cooling air outlet is always below the freezing point.
Do not store food near the outlet of the cooling air as it block the air circulation.
And do not block the outlet. If the outlet of the coeting air is blocked, the
refrigerator compartment will not be cooled.
- 101 -
TROUBLE DIAGNOSIS
4-3° Odor and Frost
Problems
Odor in the refrigerator compartment.
Checks and Measures
• Explain the basic principles of food odor.
• Each food has its own peculiar odor. Therefore it is impossible to prevent or
avoid food odor completely when food is stored in the completely sealed
refrigerator compartment. Deodorizer can absorb some portions of the odor bat
not completely. The intensity of odor depends
environments.
• Check the temperature
on refrigerator conditions and
control button and set at "strong".
• Clean inside of the refrigerator with detergent and remove moisture. Dry inside
the refrigerator by opening the door for about 3 or 4 hours and then set the
temperature control button at "strong".
Frost in the freezer compartment
• Explain the basic principles of frost formation.
• The main causes for frosting:
- Door was left open.
- Air penetration through the gasket
- Too frequent door opening. (parties. etc.)
- Hot foods are stored before they are cooled down. The temperature
is -19°C. if temperature
of freezer
is set at "MID". if hot air comes into the refrigerator,
fine frost forms as cold air mixes with hot air. If this happens quite often, much
frost forms inside of the refrigerator.
form inside of the refrigerator.
Frost in ice tray.
If the door is left open in Summer, ice may
• Explain basic principles of frost formation.
- When ice tray with full of water is put into a freezer compartment,
evaporates.
the water
If cool air fan operates, the moisture attached to the jaw (protruded
part) of ice mold shall freeze and form frost, if warm water was put into the ice
mold, the situation will become worse,
- 102 -
TROUBLE DIAGNOSIS
4-5, Others
Problems
The refhgerator
case is hot.
Checks
and •easures
• Explain the principles of radiator.
• The radiator pipes are installed in the refrigerator case and partition plate
between the refrigerator and the freezer compartment in order to prevent
condensation formation. Particutady in summer or after installation of
refrigerator, it may feel hot but it is normal. If there is no enough space to
dissipate heat, it can be hotter due to lack of heat radiation. Please install a
refhgerator in a well-ventilated place and leave a clearance between refdgeratol
and wall:
Small holes in a door liner
• Explain that the hole is for releasing gas.
• A small hole in the deer liner is for releasing gas during
lining work.
Electric bills are too much.
insulation materials
With a releasing hole, forming can be easily done.
• Check the use conditions.
• Too frequent door opening and hot food stodng cause the compressor
operate continuously
Condensation
on the inside
wall of the refrigerator
compartment
and the cover of
properly vegetable drawer,
When is the power
connected?
and hence increase the electdc consumption
• Explain how to store feeds
• Condensation
forms when refrigerator
is installed at damp area, door is
frequently
opened, and wet foods are not stored in the air tig_ container
wrapped.
Be sure to store wet foods in the air tight container
or
or in the wrap.
• When should the power be connected ?
• You can connect the power dght after the installation.
laid flat dudng transportation
Door does not open properly.
to
and bills.
But if the refrigerator was
for a long peried of time and the refrigerant
compressor
oils are mixed up, then this will affect badly the performance
refrigerator.
installed.
Be sure to connect the power 2-3 hours after refrigerator is
• Refrigerator compartment
and
of a
deer does not open properly.
• When the door is open, warm open air comes into the compartment and is
mixed up with cool air. This mixed air shall be compressed
and increase the
internal pressure when door is closed. This causes the deer sticked closely to
the refrigerator in a moment. (If the refrigerator is used for a long time, it will
then open smoothly.)
• When the refrigerator
compartment
oornnpartrnent door is open and close, the freezer
door moves up and down.
• When the refdgerator
compartment
the freezer compartment
door.
door is open and close, fresh air comes into
and moves up and down the freezer compartment
• Door opens too easily.
• There is a magnet in the gasket rubber so that it is ok. if door is securely closed
without a gap. it can be open easily if the foods in the refrigerator or freezer
compartments
hold the door open.
• A door does not close properly.
• If the rear side of the refrigerator
is raised higher than front side, deer shall not
be easily closed. Adjust the level of refrigerator
- 103-
with levelling screws.
HOW TO DISASSEMBLE AND ASSEMBLE
1. DOOR
1) Remove
(3) Disconnect
lower cover and then
disconnect
supply tube in the lower part of freezer
upper hinge O from a hinge supporter (_)
by grasping the front part of upper hinge and _ifting up
(Hinge Assy, U) in arrow direction _) and pull forward
water
in arrow _) direction. Be careful as the door may be
fallen down.
door.
• Pull a water supply tube (_)forward while pressing (_) part
to disconnect water supply tube as shown below.
I
2) Remove a freezer door.
(1) Loosen hinge cover screw of freezer door and remove
cover.
Disconnect
all connecting
lines except eerthing cord.
(4) Lift up the freezer door (_) in arrow direction and
disconnect the door from the lower hinge (_). Don't pull
a door forward.
Connecting
_
Cover, Hinge
%,;g
(2) Turn hinge lever in arrow_ directionuntil it is
loosened and take it outin arrow _) direction.
Note : • Lift up a freezer dooruntila water supplytube is
fully takenout.
Lever, Hinge
(5) Assembly
®
Note : * When disconnecting refrigerator door, turn hinge
lever counterclockwise.
• If hinge lever or bracket hinge pin is deformed
during assembling freezer and refrigerator
doors,
fix two screws (Tap Tire Screw, M6: Hinge, L fixing
screw) in the hole of upper hinge.
- 104 -
is the reverse order of disassembly
HOW TO DISASSEMBLE AND ASSEMBLE
2. HANDLE
1) Put blade screwdriver
into a groove on the side of a
4) Disassembly of a grille fan (L) : Hold upper part of a
gdIle fan(L) and pull forward carefully.
Deco handle and lift up a little bit in arrow O direction
5) Loosen two screws.
and push up with hand in arrow _) direction and
disconnect.
6) Disassembly
of shroud. F(U) : Disconnect
after removing
7) Disassembly
forward.
housing of B
two rail guides with a blade screwdriver.
of shroud. F(U) : Hold upper part and pull
8) Check foam PU sticking conditions
F(U) and F(L) during assembling.
around a shroud,
If damaged,
torn or
badly sticked, aasemble with a new one after sealing
well.
4. ICEMAKER
ASSY
Handle, Deco
\
1.
Dispenser
Model
1) How to disassemble:
(1) Remove ice bank from the freezer compartment.
(2) Loosen two screws on the upper part of icemaker
bracket.
(3) Disconnect icemaker bracket so that it can slide
forward.
(4) Disconnect
2) Put blade screwdriver
into e groove on the side of a
DECO handle and lift up in arrow direction (_) and push
down with hand in arrow direction _) and disconnect.
icemaker housing and sensor housing.
(5) Disconnect icemaker horizontally by pressing bracket
hook part. ( Don't disassemble further, The set value
may be changed.)
2) How to assemble
3) Push up a piece handle (_ in arrow direction with hand
and disconnect.
: The assembly
is the reverse order of
the above disassembly.
4) Turn screw in arrow direction with a cross driver and
disconnect.
Screw
Bracket, Ice_
Ice Maker Unit
Handle, Piece
"_,N_._
ever
3. SHROUD,
GRILLE
FAN
Sensor
1) Loosen two screws after disconnecting a cap screw of a
Cover, Sensor
grille fan(U) with a balde screwdriver,
2) Disassembly of a gdlfa fan(U) : Pull forward after
opening hook at
. part with a blade screwdriver.
Note : When the ice tray is not horizontal after assembly,
3) Disconnect housing (_ of a grille fan (L) from the main
assembly must be wrong. Check and assemble
again.
body.
- 10,5 -
HOW TO DISASSEMBLE AND ASSEMBLE
5. DISPENSER
1) Disconnect
4) Loosen four screws with a phillips screwdriver
button assembly
and pull a
funnel Assy to disconnect.
by pulling down until it
stops and then pulling forward.
Funnel Assy
5) Duct cap Assy is disconnected if hold lever connecting
screw is loosened with a phillips screwdriver,
2) Remove display frame Aesy by making a gap between a
display frame Assy. and funnel Assy. with a batde
screwdriver and pulling it forward. The cover dispenser
is fixed with a hook.
6) For assembling a duct cap Assy., insert one end of a
3) Display Assy can be disconnected
spring into the right hole of dispenser lever, and insert
by pressing the
the other end into the dght hole in upper part of
dispenser. And then assemble a holder lever after fixing
upper part of a cover dispenser and pushing a display
Assy. after disconnecting
display frame Assy. housing.
a holder at a solenoid Assy working part.
Heater, Sheet
Spring
;Dispenser
Solenoid Assy
- 106 -
HOW TO DISASSEMBLE
7) Dispenser
AND ASSEMBLE
Related Parts
t
1
FRAME ASSY, DISPLAY
2
COVER, DISPENSER
4
PWB(PCB) ASSY, DISPLAY
7
FUNNELASSY
8
SWITCH,
9
FRAME, FUNNEL
10
LEVER(SWITCH)
11
FUNNEL
12
RUBBER, FUNNEL
13
SWITCH,
14
SOLENOID
15
SPRING
16
HOLDER,
17
CAP, DUCT
! 19
I--
< _)
Cap Assy, Duct Detailed Drawings>
- 107-
MICRO
ROCKER
ASSY
LEVER
LEVER, DISPENSER
20
RUBBER,
CAP
21
BUTTON ASSY
22
BUTTON
23
HOLDER,
24
DECO, DRAIN
BU'I3-ON
HOW TO DISASSEMBLE AND ASSEMBLE
6. WATER
TANK AND WATER
LINE
7-2. Home
1_ The water tank at back and lower part of a refrigerator is
fixed by one screw and has a capacity containing
7
1) Disconnect
though the refrigerator
compartment door with a phillips screwdriver. And
loosen 4 screws (_ and two screws (_. Pull H/Bar door
Assy O. forward to disassemble.
water is not cold even
is working.
In this case,
3) Loosen two screws _, 1_)fixed on H/Bar door Assy. and
two screws _) with a cross driver to disassemble arm
Assy.
dispense ice first in the cup and then water to make a
cold water.
7. HOME
parts disassembly and assembly'
H/Bar Door Assy O.
2) Loosen two screws (_) attached on the refrigerator
glasses (180cc per glass) of cold water. It will take time
to make more cold water in the tank.
* The first portion of dispensed
Bar
4) Assemble parts by performing
reverse order.
BAR
the disassembly
in
Note : * Assemble carefully parts 0, (_, _ until they are
fixed firmly when assembling them.
7-1. Home Bar related parts
•Adjust extedorgap
by adjusting parts _, (_ and
when assembling.
1.8
1.8
o+
_5
1 DOORASSY, H/BAR
7
SCREWTAPTITE(ARM)
2 SEREW,TAPTiTE(HINGE-WB) 8
ARM ASSY
3.SCREW Iv_a.CHI_(HINGE_
! 9
STOPPER
4 HINGE ASSY H/BAR
5 HINGE ASSY H/BAR
tl SCREW t,,IACHINE(HINGE-HYE
6 CAP,ARM
- 108 -
EXPLODED VIEW
FREEZER DOOR PART: GR-P247, GR-P207, GR-L247, GR-L207
I
- 109-
EXPLODED VIEW
FREEZER
COMPARTMENT
* : Optional part
-113-
EXPLODED VIEW
REFRIGERATOR
COMPARTMENT
* : Optional part
I
-114-
EXPLODED VIEW
ICE & WATER PART
* : Optional part
-115-
EXPLODED VIEW
MACHINE
COMPARTMENT
: Optional part
I
I
L
-116-
EXPLODED VIEW
DISPENSER PART
- 117-