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DIAGNOSTIC
6-4) If there is a trouble with self-diagnosis(sensor failure)
1) If the ambient temperature sensor has trouble
This model has an ambient temperature sensing operation in the panel PCB. The sensed information is communicated
between main PCB and panel PCB. So you must review the causes of failure without disassembling the panel PCB. If it
displays the sensor ERROR in the parts related to the ambient temperature sensor on the panel, it is understood that the
communication with MAIN PCB is normal. In this case, check the sensor unit, missing wires and short & breaking or wires, etc.
No trouble with PCB and temperature sensor.
Recheck connector for contact failure.
YES
YES
YES
2) If the temperature sensor of Refrigerator has trouble (Apply to the other sensor checks.)
See “Circuit Operation” and “How To
Check Temperature sensor” in the
manual. (Check voltage at both sensor
terminals on the upper hinge connector of
freezer, or measure resistance after
disassembling the connector.)
Compare the ambient temp with temp Table
when using the measurement method
described on How To Check Temp
Sensing.
Measure the sensor-connected No. 7 No.8, after
disconnecting wires from the upper hinge connector.
- Error in sensor can be seen on the front display of refrigerator. If sensor failure is found when power is initially impressed to refrigerator, the product will
not work, and display is repeatedly blinking in the trouble occurred sensor.
- Even if sensor has failure during the oeration refrigerator will not stop working but can’t run the normal cooling operation because of being operated in
the Emergency Operation mode. Thus, be sure to follow instructions in the manual when you make self-diagnosis.
Troubleshoot the connector’s contact
failure or missing
Is Main PCB connector(CN50)
inserted correctly?
Is the ambient temperature
sensor normal?
Is the sensor voltage measured at the
upper hinge connector normal?
Start
NO
Replace temperature sensor.
NO
Check the soldering on the main PCB for
shorts & breaks.
NO
YES
YES
YES
YES
See Circuit Operation” and
“How To Check Temperature
Sensing” in the manual.
See Circuit Operation” and
“How To Check Temperature
Sensing” in the manual.
Exchange the temperature sensor.
Is the unit of refrigerator
sensor normal?
Is Main PCB connector
(CN30) inserted correctly?
Is the insertion sequence
of connector(CN30) wire identical to
the circuit diagram?
Is the input of voltage to Main
MICOM pin No. 57 normal?
Start
NO
Troubleshoot the connector
’s
contact failure or missing
NO
Check the soldering on the main PCB for
shorts & breaks
NO
Correct the wrong configuration of connector
wire-if it is not inserted or incorrectly inserted
to coincid with the circuit diagram.
NO
No trouble with PCB and temperature sensor.
Recheck the connector for an error of contact.
6363