Samsung RF20HFENB Service Manual page 49

TROUBLESHOOTING
4-2-3. If Ice Maker does not operate
1. Water is automatically supplied to the Ice Maker by temperature & time and Ice Maker dispenses cubed or
crushed ice.
2. Power is applied to the one end of wires all the time, so be careful when disassembling and shell refer to its
exploded diagram in any case.
3. Ice Maker operation shall be checked after pressing the Ice Maker Test S/W.(Freezer Ice Maker) it is
impossible to check when the power is disengaged.
ERROR Code
MICOM(IC10) Operation Status
Ready
#46
(Test Switch)
5V
MICOM(IC10) Operation Status
Ready Rotation
Rotation
#44 5V 0V
☞ Checking method of Ice Maker Voltage
The voltage between PCB common Ground REG1 Heater Sink and
1) Test Switch Operation (press selected) ; CN90-#5(Gray) shell be DC 0V.
Test Switch Ready ; CN90-#5(Gray) shell be less than DC 5V.
1)Test Switch Operation
☞ Checking Method of Ice Maker Voltage PCB common Ground REG1 Heater Sink and
2) IC10 MICOM #44 voltage ; Ready(5V) → Rotation(0V) → Half Rotation(5V) → Return(0V) → Ready(5V)
* MICOM #44 voltage is same as Connector CN90-7(Purple).
Operation
0V
Half Return
Ready
Rotation
5V 0V 5V
No trouble with PCB and parts
Recheck the bad contact of connector
1)Test Switch Ready
Start
Does Ice Maker
perform the self-diagnostic function
for sensing its location?
Yes
Does Ice Maker
rotate when pressing the Ice Maker
Test S/W ?
No
Is the input voltage of
IC10 MICOM #44 normal?
Yes
Is the water supplied
after passing the certain period
of time?
Yes
Does Ice Maker Sensor
unit normal?
Yes
49
No
1) Check the wiring connections.
2) Check / Replace Ice Maker
KIT
Yes
Normal
No
1) Check the wiring connections.
2) Check / Replace Ice Maker
KIT
3) Check / Replace Main PCB
No
1) Check / Replace Water Valve
* Refer to the operation
condition of Water Valve
No
1) Check / Repair Ice Maker
Sensor
* Refer to the solution "If Ice
Maker Sensor has trouble"
Common PCB
Ground of REG1 Heater Sink