87
TROUBLESHOOTING
- 1 BOARD
[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.
Door stays open?
Was Water penetrates
into Door S/W?
Is the connector (CN50)
inserted properly?
Is the Door S/W in
good condition?
Start
Check if there is any obstacle
pushing the Door open.
Replace the Door S/W.
Repair the breaking of a wire,
Door S/W.
Insert the connector.
Replace the Door S/W.
Yes
No
No
No
Closed
No
Yes
Yes
Yes
Check MAIN PCB and Door S/W.
Remove and measure the continuity of
Door S/W by pressing it (On/Off).
Check if the value changes between 0Ω
and ∞Ω.
Gap exists.
1) When there is "Ding Dong" sound not stopping
The unit is not in
Forced Operation or Forced
Defrost mode.
Does the beep sound continue
Does the beep sound continue
to sound when the unit is plugged
to sound when the unit is plugged
out and then reinserted?
out and then reinserted?
Start
Cancel the Forced Operation/Defrost.
MAIN PCB is normal
Yes
No
No
Yes
Check if there is any foreign
substance at Test Jumper of MAIN
PCB or any part shorted out.
2) When it keeps 'Beeping'
Does the MIC01 # 1
voltage change when the door is
open/close?
Door & MICOM state
Door
MIC01 #1
Close
0V
Open
5V
