Red
LED
Yellow
LED
Green
LED
Terminals
4 and 5
Terminals
6 and 7
Condition
Solution
On
Off
Flashing Closed
Open
Alarm. The access
door is missing or
loose.
Determine the
cause of the
alarm and reset
the receiver.
Replace the
access door.
On
On
On
Closed
Open
Alarm and Trouble. An
alarm occurred, then
the beam was
blocked.
Determine the
cause of the
alarm and reset
the receiver.
Clear the beam
path.
Maintenance and Testing
Fire alarm reset
Reset the receiver after a fire alarm by removing power from the receiver for at least 1 sec.,
then reapply power.
For additional information, see Power outage, page 24.
Reference voltage adjustment
Notice!
Clean covers are necessary for proper reference voltage readings. For cleaning procedures,
see Cleaning, page 24.
Check the detector’s reference voltage a minimum of once each year. Check the voltage more
often if required by local regulations or AHJs.
To check the reference voltage, connect a VOM to the voltage monitor contacts on the D306
or D307 if used. If you do not have a D306 or D307 connected to the detector, remove the
receiver access door and measure the reference voltage using the supplied test cable. For
cable connection, see Fine-Tune alignment, page 20.
If the voltage is less than 3.8 VDC or greater than 4.2 VDC, remove the access cover and press
the setup button to initiate a reset of the reference voltage. The reset can take 1 min to 2 min.
Cleaning
Clean the outside of the covers a minimum of once each year. Use a common window cleaner
and a soft, clean cloth. Under normal conditions, there is no trouble alarm if the beam is not
continuously blocked for longer than 18 sec. After cleaning, recheck the reference voltage. If
voltage is less than 3.8 VDC or greater than 4.2 VDC, reset the reference voltage using the
procedure in Reference voltage adjustment, page 24.
Power outage
When power is removed and reapplied to the receiver, such as in a power outage or alarm
reset, the original reference voltage information is lost.
–
If the cover is on during power‑up, the receiver automatically restarts the internal setup
process for a new reference voltage when power is applied.
8
8.1
8.2
8.3
8.4
24
en | Notices
Long-range Beam Smoke Detectors
2014.01 | 06 | F.01U.068.899
Installation Instructions
Bosch Security Systems, Inc.