If The Trouble Is Detected By Self-Diagnosis; If Ice Maker(R) Sensor Has Troubled - Samsung RFG237AA Service Manual

TROUBLESHOOTING

4-2-1. If the trouble is detected by self-diagnosis

- The error of sensor will be displayed on the front of display.
When the error of sensor is detected at initial power ON, the appliance will operated by the
emergency mode and display of abnormal sensor part will blink.
- The appliance will not stop operating when the error of sensor is detected during operation of the
appliance.
But normal freezing might be not operated if the appliance is operated by the emergency operation
mode. You would better to check the appliance according to the self-diagnosis of the manual.

1) If ICE Maker(R) Sensor has troubled

ERROR Code
DATA1.
Temperature table
** Measuring point of resistance value according to
Sensor **
ICE MAKER(R) : CN30#7 ↔CN76#1 measuring resistance value
** 0Ω: Short trouble / ∞Ω: Open trouble
Refer to circuit diagram in the manual
Sensor MICOM/Connector number
ICE Connector CN30-"7"(Brown) and
Maker(R) REG1 HEAT-SINK PCB common Ground
Voltage measured between 4.6V ~ 0.6V.
Measuring voltage of IC01 MICOM #75,
CN30-"7"(Brown) and REG1, HEAT SINK from
PCB typical Ground part are similar.
→ Check the measure on the SENSOR MARKING #4(R312)
due to the SMD MICOM
☞ Checking Method of ICE MAKER(R) Senser resistance CN30
#7(Brown) ↔ CN76 #1"(Gray)
- Compare the temperature table after the measure.
Start
Is MAIN PCB Connector
CN30 inserted correctly?
YES
Is ICE Maker(R) Sensor
unit normal?
YES
Is the voltage between
MAIN PCB Connector CN30#"7"(Brown) and
REG1, HEAT SINK normal?
YES
Is input voltage of IC01
MICOM #75 normal?
YES
No trouble with PCB and temperature sensor.
Recheck the bad contact of the connection.
☞ Checking method of ICE Maker(R) Sensor voltage
- Measure the voltage of Sensor Check Point #4(IC01 MICOM #75) or
CN30#7(Brown) ↔ REG1, HEAT SINK.
- Compare the temperature table after the measure. Measuring voltage
of CN30#4(Brown) ↔ REG1, HEAT SINK are below.
65
NO
Bad contact of connector/ insert correctly
NO
Replace the temperature sensor
NO(0.6V > Measurement < 4.6V)
Check the contact of PCB & Wire
Terminal correctly.
NO
Check the iced-solder, solder bridging,
disturbed solder.
Replace the PCB
typical PCB Ground
REG1 HEAT-SINK