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Freezer door MICOM No. 49,
Fridge door MICOM No. 47
CF - door micom no.50
CR - door micom no.48
– Regular voltages are 5V to Open :
0V to Close.
Separate the door S/W and
check if the measured value of
unit is changed from 0 to
depending to S/W ON/OFF.
1) If “Ding-Dong” sounds continuously
Is the door slightly open?
Start
Remove causes after understanding
the conditions for interference by door
gasket, food etc.
Is moisture penetrated
into the door S/W?
Exchange the door S/W.
Is the input voltage of main PCB
changed at door-open, door-close?
Troubleshoot the breaking of
wire and bad door S/W.
Main PCB and door S/W are normal.
Yes
Yes
No
NO
NO
Troubleshoot if connector is not
inserted or poor contact.
NO
inserted or poor contact.
Exchange the door S/W.
NO
YES
Is connector (CN30) inserted
correctly?
YES
Main PCB and door S/W are
normal?
YES
2) If “Beep” sounds continuously
Did you select forced
operation and forced defrosting?
Start
Release the forced operation and
forced defrosting functions, or turn
ON again after power OFF.
Does buzzer still sound
after power-on again?
Main PCB is normal
Check if there is any part shorted out or
foreign matter in the test jumper part within the
main-PCB.
Selected
NO
NO
YES
DIAGNOSTIC
6-5) Alarm Sounds continuously(related to the buzzer)
6464