Samsung RF20HFENB, Service Manual

Page: 49 / 67

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.
Start
No
Yes
Yes
No
Yes
Yes
No
No
Does Ice Maker
perform the self-diagnostic function
for sensing its location?
Is the input voltage of
IC10 MICOM #44 normal?
No trouble with PCB and parts
Recheck the bad contact of connector
Does Ice Maker
rotate when pressing the Ice Maker
Test S/W ?
Is the water supplied
after passing the certain period
of time?
MICOM(IC10) Operation Status
Ready
5V
Operation
0V
#46
(Test Switch)
MICOM(IC10) Operation Status
Ready
#44 5V 0V 5V 0V 5V
Rotation Ready
Half
Rotation
Return
Rotation
ERROR Code
Yes
No
Does Ice Maker Sensor
unit normal?
1) Check / Repair Ice Maker
Sensor
* Refer to the solution "If Ice
Maker Sensor has trouble"
1) Check / Replace Water Valve
* Refer to the operation
condition of Water Valve
1) Check the wiring connections.
2) Check / Replace Ice Maker
KIT
3) Check / Replace Main PCB
Normal
1) Check the wiring connections.
2) Check / Replace Ice Maker
KIT
☞ 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.
☞
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).
1)Test Switch Operation 1)Test Switch Ready
Common PCB
Ground of REG1 Heater Sink