When Alarm Sounds Continuously Without Stop(Related With Buzzer Sound) - Samsung RF4287HARS Service Manual

AW3 SM-EN 2011.3.31 2:56 PM 페이지88 in
TROUBLESHOOTING

4-2-9. When alarm sounds continuously without stop(related with buzzer sound)

① If 'ding-dong'sound continuously
Door & MICOM State
FZ
Door
MICOM(#53)
Close 5V(High)
Open 0V(Low)
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.)
② If 'beep-beep' sounds continuously
into the door switch?
FF
MICOM(#52)
Mid Drawer
MICOM(#51)
Right and
Left
0V(Low) 0V(Low)
5V(High) 5V(High)
voltage of main #53,#52,#51
changed at door-open and
MAIN PCB & Door S/W is normal.
Recheck and replace Panel PCB
when power On again?
Recheck and Replace Panel
PCB
Start
Door is ajar
Is door closed
completely?
Is water penetrated
Is the door
switch unit normal?
Is the connector CN76
inserted correctly?
Is the input
close status?
Start
Is manual operation
/defrost selected?
Does buzzer sounds
88
Remove causes after comprehending
the conditions of interferance by door
gasket, food etc,
Replace Door S/W
Replace Door S/W
Connector is not inserted,
Repair disconnect part
Repair wire connection and
Door S/W
Enforce the cancelation the
manual operation/ defrost function
or power On after power Off
Normal