Samsung RS68N Series Service Manual page 84

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PRECAUTIONS(SAFETY WARNINGS)
4-5-3. Self-Diagnosis Error (Defective Sensor)
When there is sensor error, display panel show that. When it occurs during the initial power on time, display
panel keeps blinking relevant 7-SEG and the refrigerator go into the emergency operation mode.
Under the emergency operation mode, the refrigerator can not do its normal operation. So check out with the
Self Diagnosis in this manual.
1) When the Ambient Sensor is defective,
CN30
Ambient-Sensor : Read the
resistance between CN30 #1
and #2
Compare the room temp.
with sensed temp. using
Temp-Resistance Table.
2) When the Fridge Temp Sensor is defective (also applied to other sensors)
Refer to Circuit Diagram and
Temp Sensor
Troubleshooting in this
manual.
Refer to Circuit Diagram and
Temp Sensor
Troubleshooting in this
manual.
Start
MAIN PBA
connector (CN30) is inserted
properly.
YES
Ambient Tem p Sensor
is ok.
YES
PBA & Thermistor are ok.
Check the contact of the
connector again.
Start
Fridge Sensor is good.
YES
MAIN PBA Connector
(CN30) is properly
inserted
YES
The order of
Connector(CN30) is the same
as the one in the circuit
diagram
YES
The voltage
between CN30 #7 and #5 is within
the normal range
YES
PBA & Thermistor are good.
Check the contact of the connector again.
84
NO
Repair the defective contact
CN30
of the connector or insert
the connector properly
NO
Replace Thermistor.
NO
Replace Thermistor.
NO
Repair the defective contact
of the connector or insert
the connector properly
NO
Check the circuit diagram and
correct any wrong inserted
NO
Check MAIN PBA Cold Solder or
connectors.
Short.