Samsung RT53 Service Manual page 33

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TROUBLESHOOTING
4-1-2. Self-Diagnosis Function
4-1-2-1. For Models with Electronic Displays
1) Self-Diagnosis Function upon Initial Power-On
1-1) When the unit is plugged into the power, MICOM diagnoses the status of the temperature sensors in a
few minutes.
1-2) If defective sensor is foun d after Self-Diagnosis, relevant Display LEDs will blink at an interval of 0.5
sec. and there will be no beeping sound. (Refer to the Self-Diagnosis Check List)
1-3) When there is a defective sensor found and its relevant LED blinks, it will only recognize the Self-
Diagnosis button combination and it doesn't do the normal display.
But, the temperature will be controlled with the Emergency Operation.
1-4) To cancel the error code , fix the failure of the defective sensor or cancel the Initial Self-Diagnosis
Function by pressing the Power Cool and the Fridge buttons for 13 seconds.
2) Self-Diagnosis Function during Normal Operation
2-1) During the Normal Operation, press the Power Cool and Fridge buttons for 7 seconds. Then, the
"2℃,3℃,5℃" temperature LEDs on the Display Panel will blink at the interval of 0.5 seconds for 3
seconds.
When pressing the Power Cool + Fridge buttons for 10 seconds including the 3-second blinking time,
only the "3℃" temperature LED will blink at the interval of 0.5 seconds for 3 seconds. At this time,
when pressing the Power Cool and the Fridge buttons at the same time for 13 seconds including the
3-second blinking time, it will send out a "Ding-Dong" buzzer sound and go into the Self Diagnosis
Function.
2-2) When it goes into the Self-Diagnosis, the entire display panel goes off and when there is an error
occurred, it will last for 60 seconds continuously and go to the normal operation whether or not the
error is fixed.
(It sends out "Ding-Dong" sound) (Refer to the Self-Diagnosis Check List below)
2-3) Buttons won't work during Self-Diagnosis.
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