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Freezer door MICOM No. 43,
Fridge door MICOM No. 44
– Regular voltage 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∞Ω
according to S/W ON/OFF.
1) If “Ding-Dong” sounds continuously
Isn’t the door opened minutely?
Start
Remove causes after
comprehending the conditions of
interference by door gasket, food etc.
Isn’t water penetrated
into the door S/W?
Exchange the door S/W.
Is the input voltage of
main No. 43 and 44 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
NO
No
YES
NO
Connector not inserted. Troubleshoot
poor contact.
NO
Exchange the door S/W.
NO
YES
Is the state of inserted connector
(CN30)being normal?
YES
Is the door S/W self-unit normal?
YES
2) If “Beep” sounds continuously
Didn’t you
select forced operation and forced
defrosting?
Start
Release the forced operation and
forced defrosting functions, or turn ON
again after power OFF.
Do buzzer
still sound after power-on
again?
Main-PCB is normal
Check if there is any short parts due to
foreign matters and the test
jumper part in the main-PCB.
Selected
NO
YES
YES
Diagnostics
11-5) If alarm sound