Samsung RT38 Service Manual page 54

TROUBLESHOOTING
4-2-6. When the unit keeps alarming (Buzzer Sound)
[Note]
1. Fridge / Freezer Door Open Alarm : It sends out an alarm sound when it passes over 2 minutes after the door is open. And,
when the door remains open, it will keeps alarming every minute.
2. When the door is not closed properly, MICOM recognizes it as Door Open and sends out an alarm sound. When it passes
over 10 minutes after it recognizes the Door Open, the room lamps will be off. At this time, when the Door is completely
open, the Lamp will not be on right away, but after a while.
When there is "Ding Dong" sound not stopping
Door & MICOM State
Door R MICOM(#22)
Close
Open
Remove and measure the continuity of
Door S/W by pressing it (On/Off).
Check if the value changes between
0Ω and ∞Ω.
When it keeps 'Beeping'
5V
0V(Low)
Check if there is any foreign
substance at Test Jumper of MAIN
PCB or any part shorted out
Start
Door stays open?
Closed
Water penetrates into
Door S/W?
No
MICOM #22 Voltage
changes when the Door
is open/close?
Yes
Connector (CN30) is
inserted properly?
Yes
Door S/W is in good
condition?
Yes
Check MAIN PCB and
Door S/W
Start
The unit is not in Forced
Operation or Forced
Defrost mode.
No
When the unit is
plugged out and in
again, it keeps beeping?
Yes
59
Gap exists
Check if there is any obstacle
pushing the Door open.
Yes
Replace Door S/W
No
Repair Wire Cut / Door S/W
No
Insert the Connector
No
Replace Door S/W
Yes
Cancel Forced Operation/Defrost
No
MAIN PCB is normal