When Alarm Sounds Continuously Without Stop(Related With Buzzer Sound) - Samsung RF28R7201 AA Series Service Manual

TROUBLESHOOTING

4-2-8. When alarm sounds continuously without stop(related with buzzer sound)

① If 'ding-dong'sound continuously
Seperate the door switch andcheck if the
measured value of unit is changed from 0Ω to
Ω∞ according to switch ON/OFF.
* FF Door Switch is magnetic switch.
( It can be operated when door magnet is
combined with it.)
Door & MICOM State
FZ MICOM(#60)
Door
Mid-drawer Micom(#15)
Close 0V (Low),
Open 5V (High)
② If 'beep-beep' sounds conttinuously
Recheck and Replace Panel PBA.
FF MICOM(#58)
input voltage of main #29,#28 changed at
Right and Left
0V (Low)
5V (High)
MAIN PCB & Door S/W is normal.
Recheck and replace Panel PBA.
Start
Is manual
operation /defrost
selected?
No
Does
buzzer sounds when power
On again?
Yes
Start
Is door closed completely?
Yes
Is water
penetrated into the door
switch?
Yes
Is the door
switch unit normal?
Yes
Is the connector CN76
inserted correctly?
Yes
Is the
door-open and close status?
Yes
Yes
Enforce the cancelation the manual operation/
defrost function or power On after power Off
No
88
No
Remove causes after comprehending the
conditions of interferance by
door gasket, food etc,
No
Replace Door S/W
No
Replace Door S/W
No
Connector is not inserted, Repair
disconnect part.
No
Repair wire connection
and Door S/W.
Normal