92
TROUBLESHOOTING
4-2-8. When alarm sounds continuously without stop(related with buzzer sound)
Start
Door is ajar
Start
Is door closed
completely?
Is water penetrated
into the door switch?
Is the door
switch unit normal?
Is the connector CN76
inserted correctly?
Is manual operation
/defrost selected?
Does buzzer sounds
when power On again?
Is the input
voltage of main #29,#28
changed at door-open and
close status?
①
If 'ding-dong'sound continuously
②
If 'beep-beep' sounds continuously
Remove causes after comprehending
the conditions of interferance by door
gasket, food etc,
Replace Door S/W
Repair wire connection and
Door S/W
Normal
Recheck and Replace Panel PBA
MAIN PCB & Door S/W is normal.
Recheck and replace Panel PBA
Replace Door S/W
Connector is not inserted,
Repair disconnect part
Enforce the cancelation the manual operation/
defrost function or power On after power Off
Seperate the door switch andcheck if the
measured value of unit is changed from 0
Ω
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
Door
FZ MICOM(#29)
Mid-drawer Micom(#27)
FF MICOM(#28)
Right and Left
Close
0V(Low),
0V(Low)
Open
5V(High)
5V(High)
