Samsung RH29H9000SR Service Manual page 67

TROUBLESHOOTING
4-2-4. When Alarm Sound continues (Buzzer Sound)
1) When "DingDong" sound continues
F-Door sensing : CN50 #6-#9
R-Door sensing : CN50 #7-#9
Nomal State
-Door Open : 5 Vdc
-Door Close : 0 Vdc
Separate the Door S/W
and check its resistance
change according to s/w
on(0Ω) and off(∞Ω)
2) When "Beeping" sound continues
Start
Door is closed
completely?
Closed well
Is water penetrated into
the door switch?
NO
Door sensing voltage
changes as the door gets
open or closed.
YES
The connector(CN50) is
Inserted properly
YES
Door S/W is good.
YES
MAIN PBA & DOOR S/W are good
Start
Forced Operation
or Forced Defrost is
selected
NO
After plugging
in again, it sounds
continuously
YES
Replace Panel PBA
67
Door is ajar
Romove causes after
comprehending the
condition of interference
YES by door gasket or food etc
Replace Door switch
NO
Repair wire connection and
door switch
NO
Repair the defective contact
of the connector or insert
the connector properly
NO
Replace REED S/W
YES
Cancel Forced Operation
or Forced Defrost, or
Re-plug the unit
NO
Panel PBA is normal