DIAGNOSTIC
6-4) If there is a trouble with self-diagnosis(sensor failure)
-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
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.
Start
See “CircuitOperation” and “HowTo CheckTemperaturesensor” inthe manual.(Checkvoltageatbothsensor terminalsontheupperhingeconnectorof freezer,ormeasureresistanceafter disassemblingtheconnector.)
ComparetheambienttempwithtempTable whenusingthemeasurementmethod describedonHowToCheckTemp Sensing.
Is Main PCB connector(CN50)
inserted correctly?
YES
Is the ambient temperature
sensor normal?
YES
Is the sensor voltage measured at the upper hinge connector normal?
NO
NO
NO
Troubleshoot the connector’s contact
failure or missing
Replace temperature sensor.
Measure the | No.8, after | YES |
disconnecting wires from the upper hinge connector. | ||
No trouble with PCB and temperature sensor.
Recheck connector for contact failure.
Check the soldering on the main PCB for
shorts & breaks.
2)If the temperature sensor of Refrigerator has trouble (Apply to the other sensor checks.) Start
See Circuit Operation” and “How To Check Temperature Sensing” in the manual.
|
Is the unit of refrigerator
sensor normal?
YES
Is Main PCB connector
(CN30) inserted correctly?
YES
Is the insertion sequence
of connector(CN30) wire identical to the circuit diagram?
YES
NO
NO
NO
Exchange the temperature sensor.
Troubleshoot the connector’s
contact failure or missing
Correct the wrong configuration of connector
See Circuit Operation” and | Is the input of voltage to Main | NO | |
| |||
MICOM pin No. 57 normal? |
| ||
“How To Check Temperature |
|
|
|
|
|
| |
Sensing” in the manual. |
| YES |
|
|
| ||
No trouble with PCB and temperature sensor.
Recheck the connector for an error of contact.
Check the soldering on the main PCB for
shorts & breaks
63
