BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual  4-5
4.6.4 Alarm Failures 
Failure Description  Possible Cause  Troubleshooting 
Alarm LED off or cannot 
be turned off while the 
audible alarm is 
sounding
 
Cable defective or 
improperly connected
 
 Verify the cable connecting the alarm LED
board to the main control board is properly
connected.
 Verify the connecting cables and connectors
are not damaged.
Alarm LED board failure  Replace the alarm LED board. 
Main control board 
failure
 
Replace the main control board. 
No audible alarm sounds 
emitted while the alarm 
LED is normal
 
Audible alarm disabled 
Select the 
Main Menu quick key, from the 
System column, select Maintenance  →  enter 
required password  →  select 
Alarm, set 
Minimum Alarm Volume to a proper value. 
Select the 
Main Menu quick key, from the Alarm 
column, select 
Setup, adjust the alarm volume to a 
proper value. 
Speaker failure  Replace the speaker. 
Cable defective or 
improperly connected
 
Verify the cable connecting the speaker to the 
main control board is properly connected.
 
Main control board 
failure
 
Replace the main control board. 
Failure Description  Possible Cause  Troubleshooting 
The parameter module 
does not respond
 
Logic version error of 
the internal module rack 
COM board
 
Upgrade the logic version of the internal module 
rack COM board.
 
Power supply to the 
internal module rack is 
not correct
 
The internal module rack COM board or main 
control board may fail, and 12 V cannot be 
output.
 
Main control board 
failure
 
Replace the main control board.