If The Trouble Is Detected By Self-Diagnosis - Samsung RF28R7201 AA Series Service Manual

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 not operated 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 (check the other sensors in the same procedure)
ERROR Code
DATA1.
Temperature table
** Measuring point of resistance value according to Sensor **
ICE MAKER: CN90 "14" ↔ "24" measuring resistance value
ICE Room: CN90 "2" ↔ "4" measuring resistance value
** 0Ω: Short trouble / Ω∞: Open trouble
Refer to circuit diagram in the manual
Sensor MICOM/Connector number
ICE Connector CN90-"14"(WHT) and "13"
Maker Pin(CN90) from PCB typical Ground
Connector CN90-"2"(GRY) and "13"
ICE Room
Pin(CN90) from PCB typical Ground
Voltage measured between 4.6V ~ 0.6V.
ICE Maker : Measuring voltage of IC01 MICOM #14,
CN90-"14"(WHT) and "13" Pin(CN90) from
PCB typical Ground part are similar.
→ Check the measure on the voltage of
Resistance, R925 DUE to the SMD MICOM
ICE Room : Measuring voltage of IC01 MICOM #11, CN90-
"2"(GRY) and "13" Pin(CN90) from PCB typical
Ground part are similar.
→ Check the measure on the voltage of
Resistance, R919 DUE to the SMD MICOM
ICE Maker
☞ Checking method of ICE Maker Sensor resistance
CN90 "14"(FLAT WHT) ↔ "24"(FLAT WHT)- Compare
the temperature table after the measure.
ICE Room
☞ Checking method of ICE Room Sensor resistance
CN90 "2"(GRY) ↔ "4"(YEL)- Compare the
temperature table after the measure.
Start
Is MAIN PCB Connector
CN90 inserted correctly?
YES
Is ICE Maker Sensor
unit normal?
YES
Is the voltage
between MAIN PCB Connector
CN90 - "14"(White) and "13" Pin(CN90)
from PCB normal?
YES
Is input voltage of IC01
MICOM #14 normal?
YES
No trouble with PCB and tetmperature sensor.
Recheck the bad contact of the connection.
☞ Checking method of ICE Maker Sensor resistance
- Measure the voltage of Resistance
ICE Maker : R925(IC01 MICOM #14) on PCB or CN90 "14"(WHT)
and "13" Pin(CN90) from PCB
ICE Room : R919(IC01 MICOM #11) on PCB or CN90-"2"(GRY) and
"13" Pin(CN90) from PCB
- Compare the temperature table after the measure. Measuring voltage of
ICE Maker : CN90-"14"(White) and "13" Pin(CN90) from PCB
ICE Room : CN90-"2"(GRY) and "13" Pin(CN90) from PCB
77
TROUBLESHOOTING
NO
NO
Replace the temperature sensor
NO(0.6V >
Measurement < 4.6V)
Recheck the wire connection part
NO
PIN Number
Bad contact of
connector/ insert correctly
Check the iced-solder, solder
bridging, disturbed solder.