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PRECAUTIONS(SAFETY WARNINGS)
4-5-4. When Alarm Sound continues (Buzzer Sound)
1) When "DingDong" sound continues
Start
Romove causes after
comprehending the condition of
interference by door gasket or food
etc.
Door is ajar
Closed well
Door is closed
completely?
Replace Door switch.
YES
YES
Is water penetrated into
the door switch?
NO
Repair wire connection and door switch.
NO
Door sensing
voltage changes as the door gets
open or closed.
YES
Repair the defective contact
of the connector or insert
the connector properly.
NO
The connector(CN50) is
Inserted properly
YES
Replace REED S/W.
NO
Door S/W is good.
MAIN PBA & DOOR S/W are good
Separate the Door S/W
and check its resistance
change according to s/w
on(0
Ω
) and off(
∞Ω
)
F-Door sensing : CN50 #6-#5
R-Door sensing : CN50 #7-#5
Nomal State
-Door Open : 5 Vdc
-Door Close : 0 Vdc
Start
Cancel Forced Operation or Forced
Defrost, or Re-plug the unit
YES
NO
2) When "Beeping" sound continues
Forced Operation
or Forced Defrost is
selected
Panel PBA is normal
NO
After plugging
in again, it sounds
continuously
YES
Replace Panel PBA
