Bosch FAS-420-TT Series - Replacing a Detector Module

84 en | Installing the Aspiration smoke detector Aspiration smoke detector LSN improved
2020.04 | 6.1 | F.01U.029.275 Operation guide Bosch Sicherheitssysteme GmbH
1
2
2
3
HEAD1 HEAD2 DISPLAY
DIAG
ON 1 2 3
5 6 7 84
- +
Shield
Connecting a PC via the diagnostics cable
1 USB port with
FAS‑ASD‑DIAG,
COM1/COM2 with earlier
versions
2 DIAG connection cable
3 FAS-420 motherboard
The supplied diagnostics cable connects the aspirating smoke detector ("DIAG" connection on
the motherboard) to the PC. The FAS‑ASD‑DIAG version is connected to the PC via a USB port,
earlier DIAG versions use a COM.
For details, please see the diagnostic software documentation.
5.8 Replacing a detector module
1
2
5
6
3
4
FAS-420
series
HEAD1 DIAG HEAD2 DISPLAY
Replacing a detector module
!
Caution!
Switch off the unit before carrying out any connection work!
Do not connect or disconnect the detector module while switched on!
– Open the unit by carefully unlocking the housing cover's quick locks.
– Carefully pull the display board connection cable from the motherboard ("DISPLAY"
connection) and remove the housing cover. Once the unit is installed, fix the cover with a
service clip.
– Unplug the detector module’s connector cable from the motherboard.
– Spread the brackets provided for fixing the detector module slightly apart and remove the
detector module. Now spread the two brackets again. Carefully insert the new detector
module until you hear it click into place. Make sure that the used detector module is fixed
tightly and securely by the bracket by additionally pushing together the brackets by hand.
– Attach the detector module to the connection on the motherboard: detector module 1 to
"HEAD1", detector module2 to "HEAD2".
– Reconnect the display board cable to the "DISPLAY" connection on the motherboard.