
TROUBLESHOOTINGTROUBLESHOOTING
If buzzer does not soundIf buzzer does not sound
Buzzer is installed on the panel Buzzer is installed on the panel
PCB in this model.PCB in this model.
If buzzer does not If buzzer does not
sound even though the button is pressed, manual operation is started sound even though the button is pressed, manual operation is started
opened, it should separate panel PCB and check the breakage of buzzer and bad soldering.opened, it should separate panel PCB and check the breakage of buzzer and bad soldering.
It is very hard to It is very hard to
repair the panel PCB because repair the panel PCB because
it consists of SMD assemblies.it consists of SMD assemblies.
It is recommended to replace PCB It is recommended to replace PCB
assembly when the failure associated with panel is occurredassembly when the failure associated with panel is occurred
except the minor error such as switch pressing error, surface peeling off and so on.except the minor error such as switch pressing error, surface peeling off and so on.
a component fall on the vibrationa component fall on the vibration
plate of buzzer?plate of buzzer?
damage or breakage of the buzzer indamage or breakage of the buzzer in
the panel PCB?the panel PCB?
Does it soundDoes it sound
'dingdong' if press a button'dingdong' if press a button
on the front panel?on the front panel?
Does it make a soundDoes it make a sound
of door open alarm when you are of door open alarm when you are
door of freezer or Fridge more than 3door of freezer or Fridge more than 3
MAIN PCB normal, BUZZER normalMAIN PCB normal, BUZZER normal
Check the panel PCB with referenceCheck the panel PCB with reference
of <how to check Panel of <how to check Panel
Replace Panel PCBReplace Panel PCB
Replace Panel PCBReplace Panel PCB
Recheck the button pressingRecheck the button pressing
force and mechanical problemforce and mechanical problem