10. Troubleshooting
10-1) When Power is not On,
1. Before repair, check whether POWER CORD is normally connected.
2. Check using the following information.
Pre-Check
Snapping of 220 V AC FUSE ?
START
Replacement of FUSE
Connection of ends of
POWER CORD
DC-TRANS
1st power
is supplied?
Check of wire assembly
connection
DC-TRANS 2nd
power is supplied?
Replacement of
DC-TRANS
Snapping of FUSE on
MAIN PCB?
Replacement of FUSE
(AC 220 V 500 mA)
DC 5V on MAIN PCB
is coming out?
Repair Power part on PCB
(Replacement of REG 7805)
Voltage measurement
of REG 7085 OUT end
DC 12V on MAIN PCB
is coming out?
Repair Power part on PCB
(Replacement of REG 7812)
Wire connection of
PANEL PCB is normal?
Repair by Wire Connection
(Refer to 1)
LEAD WIRE CABI, DOOR
(Connect at hinge-upp)
PANEL PCB is normal?
Replacement of PANEL
PCB
RESET IC (ICO2) OUTLET
is DC 5V?
Replacement of RESET IC
NORMAL
Y
N
N
Y
N
Y
Y
N
N
Y
N
Y
N
Y
N
Y
N
Y
37
Refer to 4
10-2) When Compressor and Cooling FAN MOTOR does not operate,
1. Compressor does not operate at the first power supply or after compressor is OFF.
2. During defrosting, compressor does not operate.
3. When Freezer sensor is not connected, low-temperature is sensed and so, compressor does not
operate.
5minutes have passed since
COMP OFF?
START
Check after 5 minutes
Refer to 6
(Forced-operation alarm sounds?)
Replacement of
MICOM and PCB
Replacement of IC03
Compressor operate by
forced-operation?
MICOM #23 is HIGH?
Open and Repair of
Connection
Repair of Sensor and
Replacement of PCB
IC03 #16 is LOW(0V)?
Adjustment of Wire, Repair
of Connection state
COMP RELAY is normal?
Replacement of COMP
RELAY
Refer to 2
Contact state of
CONNECTOR CN70 and
CN71 is normal?
Full insertion of
CONNECTOR
COMP ASSÕY is normal?
Replacement of
COMP ASSÕY
Wire assembly and Connection state
N
Y
Y
N
N
Y
N
Y
Y
N
Y
N
Y
N
Y
Freezer Sensor
is normal?
Temperature
Sensor of MAIN PCB
is normal?
Pre-Check
38
1. When normal refrigeration operation works on the first POWER ON, but troubles with freezing and
refrigerating occur after some time (at defrosting step), there must be something wrong with Defrosting
system and then, check the defrosting system on the basis of this trouble diagnosis.
10-3) When Defrosting does not work,
CRITERIA FOR JUDGEMENT
Information
1. When there are SHORT-type troubles with EVA-SENSOR of F and R, do not charge the defrost-heater and
return to the normal operation after pause. So, if the period of non-operation of the defrost-heater is
accumulated, troubles with freezing and refrigerating may occur.
2. When there is OFF of Thermal-Fuse, a kind of safety gadget, snapping of wire, or troubles with
RELAY on PCB, troubles with freezing and refrigerating may occur because defrosting is caused by the
increase of natural temperature and thus, COMP OFF time becomes longer.
3. When there are OPEN-type troubles with Defrost-Sensor of each F and R, HEATING does not come to
be terminated and Thermal-Fuse, a kind of safety gadget, becomes snapped after some time.
So, since HEATING operation continues to operate and COMP ON does not operate, troubles with freezing
and refrigerating may occur.
On the basis
of self-diagnosis,F, R defrost-
sensor is normal?
START
Replacement of the relevant
SENSOR
Refer to reference no. 3, check of
trouble with load, of this manual
Judge on the basis of reference no. 4
and 8 of this manual
Refer to
7-6) Test function of Main function
Defrost-heater of F and
R-room are normal?
Check of Temperature FUSE,
snappingof heater itself, and
contact state of wire
Temperature of the relevant
defrost-sensor is below
-5 ?
Perform forced-operation for
some time.
Perform concurrent
forced-defroster of F, R-room
Power is supplied to
each defrost-heater?
A
B
N
N
Y
Y
N
Y
N
Y
39
After heating
for some time, COMP ON
comes to operate?
When the temperature of the
defrost-sensor for F and R comes
to be more than +5 and +17 ,
respectively, by heating, stop
HEATING and return to COMP
ON after pause time.
Normal
Repair of Connector terminal
See the LOAD OPERATION
CIRCUIT and reference 2. Check
method of RELAY.
N
Y
A
If not, re-CHECK of the
relevant sensor.
Connector terminal of
MAIN PCB is normal?
Problem with RELAY of the relevant
defrost-heater or with PCB
COMP RELAY/NORMAL CLOSE
Check of terminal contact
Replacement of defective
RELAY or PCB ASSÕY
N
Y
B
40
10-4) Trouble with self-diagnosis
(1) Trouble with ambient thermal-sensor
MAIN-PCB
connector (CN32) is normally
inserted?
START
Repair of connector
contact trouble
Ambient thermal-sensor
port is normal?
Replacement of thermal-
sensor
MICOM PIN#60 voltage
input is normal?
Check of MAIN-PCB cold
lead and short
No trouble with PCB and thermal-sensor.
Re-check of connector
contact trouble.
N
N
Y
Y
N
Y
(2) Trouble with thermal-sensor for refrigerator
Thermal-sensor
port is normal?
START
Replacement of
thermal-sensor
MAIN-PCB connector (CN31)
is normally inserted?
Repair of connector contact
trouble, Re-insertion
Wire-Connection
between MAIN-PCB connector(CN31)
sensors is normal?
Snapping of wire between
connector and sensor,
CHECK and Repair
No trouble with PCB and
thermal-sensor. Re-check of
connector contact trouble.
N
N
Y
Y
N
Check of cold lead, short,
lead Touch
N
Y
MICOM PIN#56 voltage
input is normal?
Y
41
(3) Trouble with defrost-sensor for refrigerator (Bimetal)
MAIN-PCB
connector (CN31) is normally
inserted?
START
Repair of connector (CN31)
contact trouble, Re-insertion
Replacement of
thermal-sensor
Repair of non-insertion of
connector and contact trouble
Defrost-sensor port
is normal?
Connection
between Defrost-sensor and
Connector is normal?
No trouble with PCB and
thermal-sensor.
Re-check of connector contact trouble.
N
N
Y
Y
N
Y
Check of cold lead, short,
lead Touch
MICOM PIN#57
voltage input is normal?
N
Y
(4) Trouble with thermal-sensor for freezer
MAIN-PCB
connector (CN30) is normally
inserted?
START
Repair of connector (CN30)
contact trouble, Re-insertion
Thermal-sensor
port for freezer
is normal?
Replacement of
thermal-sensor
Connection between
sensor of the freezing room and
connector is normal?
Repair of connector contact
trouble, Re-insertion
No trouble with PCB and
thermal-sensor.
Re-check of connector contact trouble.
N
N
Y
Y
N
Check of cold lead,
short, lead Touch
N
Y
MICOM PIN#58 voltage
input is normal?
Y
42
(5) Trouble with defrost-sensor for freezer(Bimetal)
MAIN-PCB
connector (CN30) is normally
inserted?
START
Repair of connector (CN30)
contact trouble, Re-insertion
Defrost-sensor
port for freezer
is normal?
Replacement of
thermal-sensor
Connection
between defrost-sensor and
connector is normal?
Repair of connector contact
trouble, Re-insertion
No trouble with PCB and
thermal-sensor. Re-check of
connector contact trouble.
N
N
Y
Y
N
Check of cold lead,
short, lead Touch
N
Y
MICOM
PIN#59 voltage input
is normal?
Y
43
10-5) When alarm continues to sound,
Information
DOOR OPEN alarm for the Freezer/Refrigerator sound for 10 seconds 2 minutes after the
first DOOR OPEN and then, continues to sound for 10 seconds at 1-minute interval when the
DOOR is in open. (Ding-Dong sounds 10 times)
If water or moisture permeates DOOR S/W, the contact of DOOR S/W comes to be SHORT.
At that case, DOOR is perceived to be in OPEN by MICOM and alarm continues.
When this situation continues for 10 minutes, the inside lamp of the freezer is turned OFF.
The lamp does not come to be ON when the door comes to open actually.
If DOOR S/W is wetted and the contact becomes rotten, the signals indicating DOOR OPEN is
not inputted to MICOM and so, the lamp is in OFF and DOOR OPEN alarm does not sound.
(1) When Ding-Dong sounds continuously,
Any trace of the
permeation of water in
DOOR S/W
START
Replacement of DOOR S/W
Input voltage
at MICOM Pin #48, #49
is changed?
Repair of wire snapping and
trouble with DOOR S/W
MAIN-PCB
connector (CN30, 31) is normally
inserted?
Repair of connector contact
trouble, Re-insertion
No trouble with MAIN PCB
and DOOR S/W
N
N
(On DOOR OPEN/CLOSE)
Y
Y
N
Replacement of DOOR S/W
N
Y
DOOR S/W itself is normal?
Y
44
(2) When ÒPeepÓ continues to sound,
Whether
Forced-Defrost or Forced-Operation
is selected?
START
Cancellation of Forced-Defrost
or Forced-Operation
Buzzer sounds in spite
of re-POWER ON?
MAIN-PCB is normal
Check of Connector
(CN40), lead TOUCH, insertion
of particles, SHORT
N
N
Y
Y
Information
ÒPeepÓ alarm does not sound except the case of Forced-Operation, Forced-Defrost, and finding
of abnormal things during Self-Diagnosis.
On the finding of abnormal things during Self-Diagnosis, the relevant things can be found on
PANEL-DISPLAY. If PANEL-DISPLAY is normal and ÒPeepÓ continues to sound, it is most
likely that Forced-Operation or Forced-Defrost is selected.
(3) When PANEL-DISPLAY does not turn on,
Connector
insertion of Hinge-Upp Cover
is normal?
START
Re-insertion of Connector,
Repair of Contact trouble
MAIN-PCB
connector (CN50) is normally
inserted?
Re-insertion of
MAIN-PCB connector
Connector
insertion at PANEL-DISPENSER
part is normal?
Re-insertion of Connector,
Repair of contact trouble
Replacement of PANEL-DISPLAY
N
N
Y
Y
N
Y
45
(4) When KEY selection of PANEL DISPLAY does not work,
Insertion of
Hinge-Upp PIN#11 of the Freezer
is normal?
START
Re-insertion of Connector,
Repair of Contact trouble
Repair using the instruction
in Reference No. 1 Connection
Diagram of CABINET-DOOR
MAIN-PCB
connector (CN50) is normally
inserted?
Re-insertion of
MAIN-PCB connector,
Repair of trouble
Connector
insertion at PANEL PCB
is normal?
Re-insertion of Connector,
Repair of trouble
Whether
more than one KEY is pushed
continuously?
Reassembly of PCB BASE
Solve the squeezed part
Operation does not start
ZD501,502
on MAIN PCB is SHORT
type fault?
Replacement of ZD501, 502
GRID signal
is inputted to MICOM
PORT #1, #2?
Replacement of
MAIN PCB ASSÕY
On push of button, check
if the signal is inputted.
Replacement of the relevant button
on PANEL-DISPLAY or Replacement
of PANEL ASSÕY PCB
N
N
Y
Y
N
Y
N
Y
Y
N
N
Y
46
Check of sensor circuit related
with F-DOOR S/W on PCB
Determine and Repair on the
basis of Reference No. 5)
Check method of DOOR S/W
Refer to Reference No. 2)
Check of RELAY Check of F-FAN
RELAY on MAIN PCB
Replacement of PCB ASSÕY
10-6) When FAN does not operate,
Information
ÒCheck of Cooling Fan, make sure that perform the check while Forced-Operation is selected.Ó
1. On OFF of COMP, cooling FAN of the Freezer (F-FAN), cooling FAN of the Refrigerator(R-FAN), COMP,
and COMP COOLING FAN maintain OFF state. But, for some time,
R-FAN may be operated by the natural defrosting function in spite of COMP OFF.
(The operation of R-FAN depend on the temperature of the Refrigerator.)
2. In spite of Forced-Operation state, R-FAN is not always ON (including normal operation).
When the temperature of the Refrigerator reaches the set temperature, R-FAN maintains OFF state.
3. When Doors of the Freezer and Refrigerator Open and then Close, each FAN operates after delay.
It means that, on DOOR OPEN during FAN operation, FAN stops immediately and on Close,
FAN operates after 1-minute delay (when the ambient temperature is more than 35 ).
(1) When FAN of the Freezer (F-FAN) does not operate (and COMP is operated normally
by the temperature),
COMP is OFF?
START
Perform the Forced-Operation
Open the DOOR of the Freezer
F-FAN is OFF?
CN70 on PCB is normally inserted?
Y
N
N
F-FAN is normal
Y
Y
On push of
F-DOOR S/W, FAN operates
after delay?
N
Replacement of faulted FAN
Y
Power
is supplied to FAN
ends?
N
Re-insertion of Connector
N
CN70 on PCB
is normally inserted?
Y
47
Check of sensor circuit related
with R-DOOR S/W on PCB
Determine and Repair on
the basis of Reference No. 5)
Check method of DOOR S/W
Refer to Reference No. 2)
Check of RELAY
COMP is OFF?
START
Perform the Forced-Operation
Open the DOOR of the Refrigerator
Make the temperature of the
Refrigerator increase
R-FAN is OFF?
Check of R-FAN RELAY on
MAIN PCB
Replacement PCB ASSÕY
Y
N
N
R-FAN is normal
Y
Y
On push of
R-DOOR S/W, FAN operates
after delay?
N
Replacement of faulted FAN
Y
Power
is supplied to FAN
ends?
N
Re-insertion of Connector
N
CN71
on PCB is normally
inserted?
Y
(2) When FAN of the Refrigerator (R-FAN) does not operate (and the temperature of
the Refrigerator is sensed normally),
48
10-7) When the fluorescent lamp (the interior lamp of the Refrigerator) is not on,
Since about 300 V/DC converted from the inputted power to INVERTER PCB is supplied,
replace when the power is OFF.
Information
1. Since voltage supplied to the fluorescent lamp is high-frequency, operation cannot be checked
using the generally used Volt-Ohm-Milliammeter (VOM).
2. On the replacement of the fluorescent lamp, the lamp does not come to be ON temporary.
So, check again after the replacement and 30 seconds after closing the door.
3. Connector is connected between R-DOOR S/W, voltage input terminal of Inverter PCB, and the lamp.
If there is any trouble with the lamp, at first check the contact fault.
Connector
(4PIN) inside the R-Room is
normally inserted?
START
Re-insertion of Connector
Filament of the lamp
is snapped?
Replacement of the lamp
R-DOOR S/W contact
is normal?
Replacement of INVERTER PCB
N
Y
Y
N
N
Only for information
(cannot be repaired)
N
Y
Fluorescent heater
is normal?
Y
Lamp Case of the upper side
of the Refrigerator
Check according to the method
in Reference No. 5)
Check method of DOOR S/W
Check and Repair of R-DOOR S/W
Caution
49
1. Since there is the possibility of electric shock while replacing the inside lamp of the Freezer,
the power should be OFF to repair.
2. Be careful of burning because the glow lamp generates heat.
10-8) When the inside lamp of the Freezer is not on,
Caution
Information
1. Inside lamp of the Freezer is regulated by transferring OPEN/CLOSE signal by F-DOOR
S/W to MICOM and controlling ON/OFF by RELAY regulation at MICOM.
2. When F-DOOR is in open for 10 minutes, the lamp is automatically OFF to avoid the possible danger.
Connector
(2PIN) inside the F-Room is
normally inserted?
START
Re-insertion of Connector
Filament of the lamp
is snapped?
Replacement of the lamp
F-DOOR S/W contact
is normal?
Repair of F-LAMP RELAY on MAIN
PCB and Replacement of ASSÕY
N
Y
Y
N
N
Re-insertion of Connector
N
Y
MAIN-PCB
connector CN70 is normally
inserted?
Y
Lamp Case of the upper side
of the Freezer
Check according to the
method in Reference No. 5)
Check method of DOOR S/W
Check and Repair of F-DOOR S/W
50
10-9) Trouble with Fluorescent Lamp and Repair method
1. Before repair, at first check whether the power of the consent is normal or whether the power
cord is normally connected.
2. Handle with care since High Voltage is supplied to the inverter circuit and high voltage
and high frequency are discharged.
Information
Fluorescent lamp turns ON/OFF by supplying power to INVERTER through ON/OFF
of R-Room Door S/W. Since the replaced lamp does not turn on immediately, open and close
the R-Room Door repeatedly.
Fluorescent lamp is connected to heater. This heater interlocks with R-FAN.
This heater is for improving the trouble of turn-on under the cold condition and there may be
trouble with the lamp caused by the heater. So, it is better to check the snapping of the heater, if necessary.
Voltage is
supplied to the input of
the inverter?
Check of R-DOOR
S/W and L/W
Lamp itself is normal?
Replacement of INVETER PCB
N
Replacement of the lamp
N
Y
Y
Rated voltage?
R-Room Door is open?
START
Open R-Room
N
Y
Pre-Check
51
10-10) When Cube and Crushed ice are not made properly,
(When Cube ice is not made in spite of the selection of CUBE ICE,)
Cube Ice
is made by the selection of
CUBE ICE
START
F-Room Door is in open?
If so, close the door.
Cube Ice is
dispensed on the operation of
ICE-LEVER?
Normal
N
Y
Y
Replacement of MAIN
PCB ASSÕY
N
N
MICOM PORT
#19 on MAIN PCB is
HIGH?
Y
Replacement of RELAY RY76
N
RELAY RY76 is ON?
Y
LEAD WIRE CHECK and
Repair the relevant part
N
Re-Check the water supply time
N
CURSH MOTOR
of the Freezer, SOLENOID
operates normally?
Water is normally supplied?
Y
Y
Information
When operation system is normal and there is no ice in ice tray, ice is not dispensed.
So, check once more if there is ice in the tray.
52
10-11) When Light of Dispenser does not operate,
Information
Lamp function turns off automatically after 20 seconds when there is no OFF signal for 20 seconds after the
selection of Lamp function. It is operated by operating LIGHT RELAY (RY74) on MAIN PCB and so, when
there are troubles with RELAY and wire connection, light may not be on. So, check RELAY operation and
the snapping of LAMP itself.
LIGHT LAMP is normal?
START
Replacement of LAMP
MICOM PORT
#17 on MAIN PCB is
HIGH (DC5V)?
Contact state of CONNECTOR
CN72 on PCB other wire connection
state, Contact trouble of Connector
of Hinge-Upp of the Freezer,
other things
N
Check MICOM,
Replacement of PCB
On the selection
of light
N
Y
Check and
Replacement of IC03
N
Y
IC03 PORT
#12 is less than DC1V?
Y
Replacement of
RELAY RY74
N
Contact of
LIGHT RELAY RY74
is ON?
Y
53
54
11. Instruction of ICE-MAKER operation and Troubleshooting
11-1) Instruction of ICE-MAKER operation
Operation to make horizontality of the ice tray on
the first power-on or the return from the
suspension of electric supply.
By delay of 1 cycle, Eject starts after about 2
hours, regardless of water supply to the ice tray.
On the finish of Ice-making, ice made in the tray
is ejected while checking the signal change of
the HOR/INV S/W and LEVER S/W and the
changing time.
On the finish of Ice-making, water is supplied to
ICE-TRAY by WATER-VALVE.
Horizontality?
START
Eject Motor stop
Delay of 1 Cycle
(below -10 )
Eject step
Water-supply
step
From the finish of Water supply to the finish of
Ice-making.
This is done by dual check of the temperature
and time of Ice-making sensor.
Ice-Making step
This is for the case of the need of ForcedOperation for the purpose of Operation TEST,
A/S, Cleaning and so on. This step performs
Ice-Making and Eject operation continuously,
prior to all other operations.
TEST step
Y
N
Reverse rotation
of Eject motor
HOR / INV LEVER S/W Judgement of Horizontality Remarks
ON(ÒLOWÓ) ON(ÒLOWÓ) No Horizontality
ON(ÒLOWÓ) OFF(ÒHIGHÓ) No Horizontality
OFF(ÒHIGHÓ) ON(ÒLOWÓ)
No Horizontality(Full ice horizontality)
OFF(ÒHIGHÓ) OFF(ÒHIGHÓ) Horizontality
( ) MICOM relevant PORT
Horizontality PIN #51
(horizontality), 50
(check-ice)
OFF : 4.5V
ON : 0.5V
11-2) ICE-MAKER function(FTA/DTA)
This is an instruction about the function of ICE-MAKER, which is optional.
ICE-MAKER makes ice automatically and continually. The automatic ice maker makes and store
ice in the ice storage bin. ICE-DISPENSER (FTA/DTA) is a model which dispenses ice made to the
outside through the freezer compartment door.
1. First operation function
1) When Power is off and on again, there is no operation for 2 seconds. And then, after
initialization of MICOM, the horizontality of ICE-TRAY is sensed.
2) By ON/OFF of HOR/INV S/W (ÒHIGHÓ/ÓLOWÓ), the horizontality of ICE-TRAY is sensed.
In other words, as shown in the following table, HOR/INV S/W and LEVER S/W are OFF and
then, HIGH voltage (usually DC 5V) is under supplying or is to be supplied to MICOM PIN NO
#50 and #51 by operating Eject Motor to make ICE-TRAY in horizontality.
3) If ICE-TRAY is sensed to be in a horizontality, stand-by for 2 hours (1 cycle time) is maintained.
This means that stand-by for horizontality of the ice-tray is maintained for 2 hours after the first
POWER ON.
4) After 2 hours of stand-by, the temperature is sensed by the ice-maker sensor at the bottom side
of ICE-TRAY and when -10 continues for more than 5 minutes, eject function operates to drop
the made ice in the ice tray into the ice storage bin by twisting the tray. This eject operation
performs regardless of the presence of ice in the ice tray.
<Table of Horizontality Sensing>
2. Water supply function
1) After Eject function (first eject operation, normal eject operation and eject operation of TEST
function) is finished and the horizontality of ICE-TRAY is sensed, water is supplied to the
ice-maker by operating the water solenoid at the machine room on the time-check basis.
Model Water Supply Time Remarks
Model with Dispenser function
(FTA/DTA)
Refer to
OPTION
function
Amount of Water supply may be changed by
OPTION function and water pressure. (Normally,
80 to 120cc is supplied by each time OPTION.)
55
3. Ice-making function
Ice-making, which operates until the finish of ice-making in ICE-TRAY after water supply,
issensed by the temperature sensed by Ice-Maker Sensor (may be changed by OPTION).
1) Check the temperature of Ice-Maker Sensor 90 minutes after water is supplied to Ice-Tray.
2) When -10 continues to be sensed by Ice-Maker Sensor for more than 5 minutes, ice-making is
perceived to be finished.
4. Eject function
Eject function is to dispense the made ice in the ICE-TRAY after the finish of ice-making.
1) At first, ON/OFF state of LEVER S/W is checked to CHECK whether the Ice-Tray is in Full ice
horizontality. When LEVER S/W is in ON state (MICOM PIN #5001ÓLOWÓ), indicating the Full
ice horizontality, Eject does not operate and is in stand-by. Eject starts to operate 20 minutes after
the change of ON to OFF of LEVER S/W.
2) If it is not the Full ice horizontality (LEVER S/W OFF = MICOM PIN NO #50 ÒHIGHÓ), Eject
operation starts immediately. At this time, the Eject operation dispenses ice from the Ice-Tray by
rotating clockwise the Eject Motor and then, twisting the Ice-Tray to the maximum. By the Eject
operation, Check-Ice Lever performs automatically the ascending operation.
3) The maximum twisted state is sensed by the operation of HOR/INVERTER S/W and LEVER S/W. In
Eject condition with horizontality, HOR/INVERTER S/W and Check-Ice are all OFF and Eject operates
by rotating clockwise Eject Motor. While Eject Motor is operating, HOR/INVERTER S/W is changed
from OFF to ON after about 1 second and LEVER S/W is changed to ON after about 3.3 seconds.
When LEVER S/W is not changed to ON even after 6 seconds, problems with MOTOR or LEVER
S/W are perceived and so, Eject operation stops to return to the horizontality.
4) When LEVER S/W is ON at the time that HOR/INVERTER S/W is changed to OFF from ON 15 seconds
before the start of clockwise operation of Motor, it is the maximum twisted point.
When HOR/INVERTER S/W is not changed to OFF from ON even after 15-second operation of Motor,
problems with HOR/INVERTER S/W or MOTOR are perceived and Eject operation stops to return
to the horizontality.
5)At the time of the maximum twisted state of the Ice-Tray, operation stops for 2 seconds.
6) Counter clockwise rotation of Eject Motor makes the Ice Tray return to the horizontality.
At this time, Check-Ice Lever descends to sense the storage state of ice.
7) On the horizontality, Cycle of Water Supply Ice-Making Eject Return to horizontality
repeats.
Timing Chart of Eject Operation
Delay time (2 seconds)
Maximum Twisted Point
Horizontality
1 sec
3.3 sec
8.3 sec
1.2 sec
2 sec
6.8 sec
8.3 sec
Return to
horizontality
HOR/INV S/W
ON
OFF
LEVER S/W
ON
OFF
Clockwise rotation of Motor
ON
OFF
Counter Clockwise
rotation of Motor
ON
OFF
56
01 On operation
When Eject, Horizontality noise, or
Water-supply is operating, after the finish of the operation.
02 On Full Ice
After removal of ice in the Ice-Tray
Check-Ice Lever ON OFF
No Items Method to operate Remarks
5. TEST function
This is for the case of the Forced-Operation for the purpose of Operation TEST, A/S, and Cleaning
and TEST function operates when TEST S/W implemented with the Ice-Maker itself is pushed for
more than 1.5 second.
1) TEST function does not operate in the case of the Eject operation, Horizontality Noise, WaterSupply Operation, and Full Ice state. The function operates only in the case of horizontality and
OFF of Lever S/W after cancellation of Full Ice.
2) With the horizontality, by pushing TEST button for more than 1.5 second, Eject operates
immediately regardless of the ice-making condition in the Ice-Tray. So, when the water is not
frozen and TEST function is operated, water will be poured out. After Eject operation and with
Horizontality noise operation, 1 CYCLE of water-supply operates. Therefore, Eject operation,
Horizontality operation, and trouble with water-supply can be checked by TEST button. If TEST
function operates normally, ÒDing-DongÓ sounds and water-supply function operates. So, if there
is no ÒDing-DongÓ sounds, check and repair should be performed.
3) On the finish of water-supply, normal CYCLE of Ice-making Eject Return to Horizontality
Water-supply operates.
<Cases when TEST function does not operate>
6. Function by F-Room DOOR OPEN
This is to minimize the noise by stopping the operation when F-Room DOOR opens.
1) When F-Room Door opens during the operation of Eject or Horizontality noise, operation
stops immediately at that time. With the door closed, normal operation starts again.
2) While water is supplying, normal operation continues, regardless of F-Room DOOR OPEN.
3) So, when TRAY is slanted or is tilted against the level on the check by opening F-Room Door, it
means the stop by F-Room Door OPEN during Horizontality operation. Therefore, close F-Room
Door and allow to return to the Horizontality after water-supply. 30 seconds after F-Room Door is
closed, check the Horizontality and if not, it may be judged to have something wrong.
When terminated by opening of F-Room Door, also TEST function does not operate and operates
after the finish of water supply.
57
11-3) ICE-MAKER CIRCUIT(On the model with Ice-Maker)
The above ICE-MAKER circuit is a circuit diagram of KIT in the Freezer.
Operation of AC solenoid at Machine Room through RELAY and then, opening and closing of
VALVE supplies water to the ICE-TRAY.
This circuit is H/W for the function of Eject, Horizontality noise, Ice-Making Thermal-Sensing,
and Full-Ice Sensing.
Thermal-Sensing part of this circuit is the same as that of MAIN H/W and circuit of HOR/INV S/W,
LEVER S/W is the same as that of DOOR S/W of MAIN H/W.
So, only circuit of EJECT MOTOR operation is described as follows.
By rotating clockwise Motor, HIGH signals outputted from MICOM PORT NO #9 is inputted to
IC05 and by output from IC05 17, the current is supplied to IC04 through MOTOR.
At this time, since terminals of IC04 is connected with CCW PORT, IC04 output PORT turns ON and
MOTOR operates counter-clockwise by the current to GROUND.
On the clockwise operation, CW PORT #8 is outputted as HIGH and Eject, Horizontality noise and so on are
operated by the clockwise operation of the relevant IC PORT.
For the instruction of the above circuit related with detailed operation, refer to the function description of ICEMAKER of this SVC MANUAL.
RED-RED
BLU-BLUE
GRY-GRAY
WHT-WHITE
BLK-BLACK
VLT-VIOLET
L/BLULIGHT BLUE
REFERRENCE
RED
BLK
WHT
WHT
GRY
BLU
VLT
L/BLU
58
11-4) Troubleshooting of ICE-MAKER
DC power
(5V,12V) is outputted
normally?
Ice-Tray is in
Horizontality?
Power terminal
trouble
Replacement
of MAIN PCB
Power Terminal
CHECK
Disassembly of
Connector
as described in
Reference No. 7
KIT CHECK
(CN90 terminal
WIRE HARNESS)
SENSOR CHECK
(Reference No. 4)
Operation CHECK
Resistance value
between ends of Eject motor , is
18 to 22 ?
N
N
N
Y
Y
Y
Trouble with
Motor
TEST S/W ( ends) is OPEN?
N
Y
Trouble with
TEST S/W
HOR/INV S/W(
,
ends)
is OPEN?
N
Y
Trouble with
MICRO S/W
LEVER S/W(
,
ends)
is OPEN?
N
Y
Trouble with
MICRO S/W
Eject sensor
(
,
ends) is within the table
of Ref. No. 8?
N
N
Y
Y
Trouble with
Eject Sensor
On push of TEST
S/W for more than 1.5 sec.
Eject and return to Horizontality operate
normally and ÓDing-DongÓ
sounds one time?
Trouble with
KIT ASSÕY
Replacement of
KIT ASSÕY
Normal
59
11-6) Operation of Ice-Maker
1. Connect the water-supply line to the supplying valve of the refrigerator to supply water.
(See the water tube connection procedure)
2. Push bucket to the end so that guide-ice of ice-maker is not in contact with the end of bucket.
(If the end of bucket is in contact with the guide-ice of the ice-maker, the ice-maker will determine
that there is enough ice and does not make ice thereafter.)
3. With a newly installed refrigerator, allow about 6 hours for the refrigerator to make ice normally and
discard the made ice for some times to remove impurities.
4. To get enough ice stored in the storage bin, use the ice dispenser normally after operating the
ice-maker for about 24 hours.
11-5) Designation of major components of Ice-Maker
(TRAY-ICE)
(EJECT-SENSOR)
COVER-SENSOR
SCREW
SUPT-RUBBER
FIXER-SENSOR
ICE-MAKER, KIT
(EJECT-MOTOR)
HOR-SWITCH
TEST-SWITCH
GUIDE-ICE
KNOB-TOUCH
Push the bucket to the end so that the
GUIDE-ICE of the ICE-MAKER is not in
contact with the end of bucket.
LEVER-SWITCH
60
11-8) Assembly of Ice-Maker
1. Fit the rear rising of the ICE-MAKER KIT to the front slot of the TRAY ICE.
2. Lift FIXER-CASE at the front of the SUPT-ICE MAKER up. ( direction)
3. Place the top rising of the ICE-MAKER KIT to the slot of SUPT-ICE MAKER for insertion.
4. Push the front of the ICE-MAKER KIT while maintaining the position.
(Be careful. If you overpush the ICE-MAKER KIT, the fixed rising of the SUPT-ICE MAKER
may be damaged.)
5. When the front of the ICE-MAKER KIT is sagging, it means the assembly is not right. At that case,
perform the assembly again.
11-7) Disassembly of Ice Maker
1. Pull out the bucket from the freezer.
2. Disassemble the SUPT-ICE MAKER, which fixes the ice-maker, and the wire housing in the
rear of the maker.
3. Disassemble by lifting the SUPT-ICE and FIXER-CASE in the front of the maker up ( direction)
and pulling the ICE-MAKER KIT out to the front ( direction).
(Do not disassemble each component of the ICE-MAKER KIT. Otherwise, the setting value
may be changed.)
REAR RISING
FIXER-CASE
FRONT SLOT
ICE MAKER KIT TOP RISING
Wire housing
FIXED RISING
61
62
Contact class Voltage at COIL ends Contact ends judgement
3 Contact
RELAY
About DC 12V
(Operation
condition)
About DC 0V
(Stop condition)
CLOSE between C and NO
OPEN between C and NC
OPEN between C and NO
CLOSE between C and NC
2 Contact
RELAY
About DC 12V
About DC 0V
CLOSE
OPEN
12. References
Reference No. 1) Connection diagram of CABINET-DOOR
Reference No. 2) Check of RELAY
At first, disconnect the housing connected
to the LOAD connector (MAIN PCB CN70,
71, 72) and then check and measure the
following things.
1. Measure the voltage of COIL ends to check
operation.
2. Measure the resistance of Contact ends to
check ON/OFF.
3. If Contacts does not operate as described
in the above table, replace the relevant
RELAY.
Example) C COMMON, NC NORMAL CLOSE,
NO NORMAL OPEN
3 contact
COIL ends
< RELAY Movable contact (make) >
COIL ends
2 contact
Measure after
disassembly
Connection at Hinge-Upp of the Freezer
Black
Brown
Red
Orange
Yellow
Pink
Blue
Violet
Gray
White
Light-Blue
Black
Brown
Red
Orange
Yellow
Pink
Blue
Violet
Gray
White
Light-Blue
Reference No. 4) Check method of various sensor
After disconnect the connector from MAIN PCB,
measure the resistance value at the sensor
terminals as follows.
1. Measure the resistance value between the
Freezer Sensor CN30 and .
2. Measure the resistance value between the
Refrigerator Sensor CN31 and .
3. Measure the resistance value between the
F-Defrost Sensor CN30 and .
4. Measure the resistance value between the
R-Defrost Sensor CN31 and .
5. Measure the resistance value between the
Ambient Sensor CN32 and .
6. Measure the resistance value between the
Ice-Maker Sensor CN90 and .
7. Compare the resulted value with the
temperature of each sensor and the conversion
table of the resistance and voltage of sensor
related according to the temperature described
in the Reference No.8 of this manual and
then, judge whether there is any problem.
When the value is resulted to be or 0 ,
check carefully the connected state of the wires.
Load Measuring terminals Judgement
F-Defrost heater CN70 and CN71 means OPEN fault of connection and Thermal-Fuse.
R-Defrost heater CN70 and CN71 means OPEN fault of connection and Thermal-Fuse.
F-Fan Motor CN70 and CN71
means OPEN fault of wire connection and Thermal COIL solid wire.
R-Fan Motor CN70 and CN71
means OPEN fault of wire connection and Thermal COIL solid wire.
Reference No. 3) Check of LOAD
After disconnect of the power cord from
power consent and of the connectors, CN70,
71 and 72 from MAIN PCB, measure the
followings.
1. Measure the resistance value between the
load terminal and terminal as follows to
judge the abnormality of load and wire
connection.
Red
Gray
F-Defrost heater
Measure after disassembly
R-Defrost heater
COMP & FAN
F-FAN
R-FAN
F-ROOM LAMP
Yellow
Freezer sensor
F-Defrost sensor
Blue
Gray
Violet
White
White
White
Refrigerator
sensor
R-Defrost
sensor
Ambient
Sensor
Measure after disassembly
Ice-Maker
sensor
On check of load according to the above measuring method, find out the measuring terminals at load
ends using the circuit diagram and perform the check.
63
Reference No. 5) Check method of DOOR S/W
Perform the check when the power is supplied.
DOOR S/W is consisted of 2 contacts
circuit. 1 contact senses DOOR OPEN/
CLOSE at PCB by DC 5V and another has a
role of ON/OFF of the inside lamp.
(Lamp Inside the Refrigerator)
1. Since there is a fluorescent lamp in the Refrigerator, at first, open the door of the Refrigerator
to check whether the lamp is normally on. If normally on, check whether the lamp is normally
off by pushing DOOR S/W while R-DOOR is opened.
If there is any problem, check DOOR S/W of the refrigerator.
2. Fluorescent lamp of HOME BAR is also to become ON by DOOR S/W when the door is opened.
If the lamp does not come to be ON by the opening of HOME BAR, check HOME BAR S/W.
(Refrigerator DOOR OPEN SENSOR at MAIN PCB)
1. Check the voltage by placing (+) terminal on and (-) terminal on of CN31.
2. If about DC 5V is measured on Refrigerator DOOR OPEN, it is normal.
3. If about DC 0V is measured on Refrigerator DOOR CLOSE, it is normal.
When there is any problem, check the wire connection and DOOR S/W.
4. HOME BAR S/W does not have DOOR OPEN Sensor.
(Lamp Inside the Freezer)
1. There is a generally used glow lamp in the Freezer. This lamp is controlled not by the contact of
DOOR S/W, but by RELAY on MAIN PCB. DOOR S/W senses DOOR OPEN/CLOSE of the
door of the Freezer. One contact is used to control the Ice-Dispenser.
Check the lamp inside the Freezer according to the method described in the above.
(Freezer DOOR OPEN SENSOR at MAIN PCB)
1. Check the voltage by placing (+) terminal on and (-) terminal on of CN30.
2. If about DC 0V is measured on Freezer DOOR OPEN, it is normal.
3. If about DC 5V is measured on Freezer DOOR CLOSE, it is normal.
When there is any problem, check the wire connection and DOOR S/W.
To Fluorescent Lamp
Measuring
terminal
Measuring
terminal
Information
1. Beside check of DOOR S/W, check the lamp itself inside Freezer and Freezer Lamp Control RELAY on PCB.
2. Also, check the lamp inside Refrigerator and INVERTER PCB.
3. Since Freezer and Refrigerator uses different contacts for DOOR OPEN sensing, OFF contact is used when
Freezer is closed and ON contact is used when Refrigerator is closed.
64
Reference No. 6) Forced-Operation and Forced-Defrost Procedure
<Forced-Operation>
This is a function for the immediate operation
of COMP and F-FAN regardless of the
temperature inside the Freezer.
1. Forced-Operation will be started by
pushing a button on MAIN PCB located at
the top of the refrigerator.
2. Buzzer sounds.
<Forced-Defrost>
This is a function for the operation of
R-Defrost or the concurrent operation of
F and R Defrost regardless of the setting
for defrosting.
1. With Forced-Operation operated, one more
push of button is for Defrost in only
Refrigerator. One more push of button is for
the concurrent Defrost both in Refrigerator
and Freezer.
2. Also, on Forced-Defrost, buzzer sounds.
3. For cancellation, power OFF and then, ON.
Reference No. 7) Check method of Ice-Maker Kit
<Eject Motor Check>
Check Method for Motor when EJECT
MOTOR does not operate.
1. Disconnect CN90 from MAIN PCB.
2. Check the resistance value between and
of CN90, connector, of Load Terminals.
3. If the resistance value is between 18 and
22 , it is normal.
4. If the value is 0 , it is SHORT fault. Check
the wire connection state and Motor.
5. If the value is , it is OPEN type and
check the wire connection line.
<TEST Operation method>
This is for check whether the Motor operates
normally and whether water is normally
supplied.
1. When S/W in the KIT inside the Freezer is
pushed, TEST operation will starts. More
detailed instruction of Test operation, refer to
the section of the ICE-MAKER TEST functions.
MOTOR
Gear Box
PCB PANEL
TEST S/W
8 Pieces of Wire
Measuring
terminal
Measure
after
Disassembly
TEST S/W on
PCB
<Exploded views>
65
Temp
-35
-34
-33
-32
-31
-30
-29
-28
-27
-26
-25
-24
-23
-22
-21
-20
-19
-18
-17
-16
-15
-14
-13
Resistance
( )
68.648
65.011
61.595
58.384
55.366
52.526
49.854
47.337
44.967
42.733
40.626
38.640
36.765
34.995
33.323
31.743
30.250
28.838
27.502
26.237
25.040
23.906
22.832
Voltage
(V)
4.364
4.333
4.301
4.268
4.235
4.2
4.164
4.127
4.09
4.051
4.012
3.972
3.93
3.888
3.845
3.802
3.757
3.712
3.666
3.62
3.573
3.525
3.477
Reference No. 8) Conversion table of the resistance and voltage of sensor according to the temperature
Voltage inputted to MICOM PORT may vary according to the H/W composition and this
specification is the standardized one for the voltage on the use of 10 -F of the potential divider
resistance.
On SENSOR OPEN, the voltage of the relevant MICOM PORT : about DC 5V (Vcc LEVEL)
On SENSOR SHORT, the voltage of the relevant MICOM PORT : about DC 0V (GROUND LEVEL)
Temp
-12
-11
-10
-09
-08
-07
-06
-05
-04
-03
-02
-01
00
01
02
03
04
05
06
07
08
09
10
Resistance
( )
21.814
20.848
19.932
19.062
18.237
17.453
16.709
16.001
15.328
14.688
14.080
14.501
12.949
12.424
11.924
11.447
10.993
10.559
10.146
9.752
9.375
9.016
8.673
Voltage
(V)
3.428
3.397
3.329
3.279
3.229
3.178
3.127
3.076
3.025
2.974
2.923
2.872
2.821
2.77
2.719
2.668
2.618
2.567
2.518
2.468
2.419
2.37
2.322
Temp
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
Resistance
( )
8.345
8.032
7.732
7.446
7.172
6.910
6.659
6.420
6.190
5.970
5.759
5.557
5.363
5.178
5.000
4.829
4.665
4.508
4.357
4.212
4.072
3.938
3.810
Voltage
(V)
2.274
2.227
2.180
2.134
2.088
2.043
1.998
1.954
1.911
1.869
1.827
1.786
1.745
1.705
1.666
1.628
1.590
1.553
1.517
1.481
1.446
1.412
1.379
66
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