85
TROUBLESHOOTING
4-14) 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.
1) When there is "Ding Dong" sound not stopping
2) When it keeps 'Beeping'
The unit is not in Forced
Operation or Forced
Defrost mode.
When the unit is
plugged out and in
again, it keeps beeping?
Start
Cancel 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
Door stays open?
Water penetrates into
Door S/W?
MICOM #8 Voltage
changes when the Door
is open/close?
Connector (CN31) is
inserted properly?
Door S/W is in good
condition?
Start
Check if there is any obstacle
pushing the Door open.
Replace Door S/W
Repair Wire Cut / Door S/W
Insert the Connector
Replace Door S/W
Yes
No
No
No
Closed
No
Yes
Yes
Yes
Check MAIN PCB and
Door S/W
Door & MICOM State
Door
MICOM #8
Close
0V
Open
5V
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
- 2 BOARD