Checking Malfunction Transmission; Checking Airflow Monitoring - Bosch FAS-420-TM Operation Manual

80 en | Commissioning
6.5

Checking Malfunction Transmission

NOTICE!
The steps below may only be carried out following an airflow calibration in accordance with
Section 6.3 Calibrating the Airflow Sensor.
Malfunction transmission occurs as part of checking the airflow monitoring system (as per
section below).
Check whether, when a pipe breakage and an obstruction are detected, the malfunction is
displayed at the aspirating smoke detector and at the fire panel.
6.6

Checking Airflow Monitoring

NOTICE!
The steps below may only be carried out following an airflow calibration in accordance with
Section 6.3 Calibrating the Airflow Sensor.
Pipe breakage
Check the breakage detection:
1.
2.
3.
4.
5.
Obstruction
Check the obstruction detection:
1.
2.
3.
4.
5.
Troubleshooting
If the airflow malfunctions are not correctly detected by the unit, proceed as follows:
Check whether...
1.
2.
3.
4.
5.
6.
7.
8.
F.01U.088.878 | 4.1 | 2010.11
Detach the pipe from the connection to the FAS-420-TM or open the test adapter.
Check whether the fault indication on the smoke aspiration system is flashing and
whether the malfunction is displayed on the fire panel.
Alternatively, check the data of the airflow sensor using the diagnostic appliance and a
PC or laptop.
Check whether the malfunction is displayed on the fire panel.
Enter the result in the test log.
Close – depending on the planned airflow monitoring – the corresponding number of air
sampling openings with some duct tape.
Check whether the fault indication on the aspirating smoke detector is flashing and
whether the malfunction is displayed on the fire panel.
Alternatively, check the data of the airflow sensor using the diagnostic appliance and a
PC or laptop.
Check whether the malfunction is displayed on the fire panel.
Enter the result in the test log.
All borings are free
The pipe system has breaks or fractures
All pipe connections are tight
The fan can blow out freely
The correct aspiration reducing film sheets were used
Any test adapters and air filters are closed
Any filter inserts are clean
Any ball valves and blowing-out valves are in the operating position.
Operation Guide
FAS-420-TM Aspirating Smoke Detector
Bosch Sicherheitssysteme GmbH