Samsung RF28HMEDBSR Service Manual page 92

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(#29)
Door
Mid-drawer Micom(#27)
Close 0V(Low),
Open 5V(High)
② If 'beep-beep' sounds continuously
FF MICOM(#28)
Right and Left
0V(Low)
5V(High)
MAIN PCB & Door S/W is normal.
Recheck and replace Panel PBA
Recheck and Replace Panel PBA
Start
Door is ajar
Is door closed
completely?
Is water penetrated
into the door switch?
Is the door
switch unit normal?
Is the connector CN76
inserted correctly?
Is the input
voltage of main #29,#28
changed at door-open and
close status?
Start
Is manual operation
/defrost selected?
Does buzzer sounds
when power On again?
92
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