Samsung RF31FM Series Manual page 196

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6. Self Diagnosis & Trouble Shooting
6-8. When alarm sounds continuously without stop
(related with buzzer sound)
3) If buzzer does not sound
NO
Is there any damage
or breakage of the buzzer in
the panel PCB?
NO
Did lead of a component
fall on the vibration plate of
buzzer?
NO
Recheck the button pressing
force and mechanical problem
YES
Replace Panel PCB
YES
Replace Panel PCB
To do list
196