If Ice Maker Does Not Operate - Samsung RF267ABRS Service Manual

TROUBLESHOOTING

4-2-4. 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. Be careful when disassembling and shall refer to its exploded diagram
in any case.
3. Ice Maker operation shall be checked after pressing the Ice Maker testing switch.
(Freezer Ice Maker) It is not possible to check when the power is disengaged.
4. We recommend that TWO PEOPLE check the PCB and Ice Maker because hey are located at front and rear
side each.
5. Be careful! The Ice Maker Heater can cause personal injury like burn.
Displays ERROR Code
2¢ (-17¡ ) is recommended
MICOM(IC02) Operation Status
#29
(Test Switch)
MICOM(IC02) Operation Status
Ready Rotation
#27
0V 4.9V
(Blade Ice Scoop)
#28
0V 0V
(Guide Ice Full)
☞ Checking Method of ICE Maker Voltage
With typical PCB Ground CN1-"3"(Black) and
1) Test Switch operation (press selected) : CN90-"5" (Gray) shall be DC 0V.
Test Switch ready ; CN90-"5" (Gray) shall be less than DC 5V.
1)Test Switch operating 1)Test Switch ready
☞ Checking Method of ICE Maker Voltage
With typical PCB Ground CN1-"3"(Black) and
2) IC02 MICOM #27 voltage ; Ready(0V) → Rotate (4.9V) → Before
complete(4.9V) → Return(0V)
* MICOM #27 voltage is same as Connector CN90-"7"(Purple)
3) IC02 MICOM #28 voltage ; Ready(0V) → Rotate (0V) → Before
complete(4.9V) → Return(0V)
* MICOM #28 voltage is same as Connector CN90-"6"(Blue)
38¢ (3¡ ) is recommended
rotate when pressing the Ice Maker
Operation Ready
testing switch(over 1.5 sec)?
5V 0V
Before
Returning
Is the input voltage of IC02
Complete
MICOM #27, 28 normal?
4.9V 0V
4.9V 0V
Is the water supplied in 6
minutes (After sensing ice bucket
Is the Ice Maker Sensor unit normal?
No trouble with PCB and temperature sensor,
Check the bad wiring connections.
typical PCB Ground
CN1-"3"(Black)
Start
Does Ice Maker
No
Yes
1) Replace the Ice Maker Kit
2) Check/Replace the Main PCB
input signal
(Micom IC02 Pin #29 - "0V")
No
1) Check the wiring connections.
Yes
2) Replace Ice Maker Kit
3) Replace MAIN PCB
No
fully)?
1) Replace the Water Valve
Yes
* Refer to the operation
condition of Water Valve
2) Replace the Main PCB
No
Yes
1) Repair the Ice Maker Sensor
* Refer to the solution "If Ice
Maker Sensor has trouble"
☞ Check the ICE Maker Heater & Motor Resistance
Resistance value can be changed according to the Voltage and
Perfermance changes.
1) Measuring the Ice Maker Heater
resistance values
CN70-"1" (Red) & CN72-"3" (White)
Resistance value : 91(364)Ohm± 7%
70
Operating Condition when motor rotates
Operating Status of Micom(IC02)
Ready Operation
Motor Load (#10) 0V 5V
Heater Load (#9) 0V 5V
Heater operates differently according to
the conditions.
Test Mode operation will be 30 sec.
2) Measuring the Ice Maker Motor
resistance values
CN70-"1" (Red) & CN72-"1" (Brown)
Resistance value : 3.93(11.76)KOhm± 7%