Aspirating Smoke Detector
–
8.2.2
2 Flashes - Error: Internal Voltage Monitoring 2
In operation with two detector modules, both LEDs flash. When troubleshooting, the following
steps should be carried out in the specified order.
–
–
–
8.2.3
3 Flashes - Error: Fan Voltage Monitoring
In operation with two detector modules, both LEDs flash. When troubleshooting, the following
steps should be carried out in the specified order.
–
–
Bosch Sicherheitssysteme GmbH
–
Disconnect the power from the unit.
–
Remove the display board's connection cable from the motherboard.
–
Restore the operating voltage and run the unit for a few minutes.
–
If the display board is faulty, the malfunction will no longer occur.
Replace the faulty display board.
Motherboard faulty
–
You will need a second motherboard to make this diagnosis.
–
Disconnect the power from the unit.
–
Replace the motherboard with a new motherboard of the same type.
–
Restore the operating voltage and run the unit for a few minutes.
–
If the motherboard is faulty, the malfunction will no longer occur.
Replace the faulty motherboard.
Operating voltage too low
–
Using a multimeter, measure the operating voltage (DC) of the aspirating smoke
detector.
–
The measurement value must be between 14 V and 30 V.
Restore the correct power supply.
Detector module faulty
–
Disconnect the power from the unit.
–
Replace the detector module incl. connection cable with a new module of the same
type.
–
Restore the operating voltage and run the unit for a few minutes.
–
If the detector module is faulty, the malfunction will no longer occur.
–
If you are using two detector modules, repeat the process with the second detector
module.
Replace the faulty detector module.
Motherboard faulty
–
You will need a second motherboard to make this diagnosis.
–
Disconnect the power from the unit.
–
Replace the motherboard with a new motherboard of the same type.
–
Restore the operating voltage and run the unit for a few minutes.
–
If the motherboard is faulty, the malfunction will no longer occur.
Replace the faulty motherboard.
Operating voltage too low
–
Using a multimeter, measure the operating voltage (DC) of the aspirating smoke
detector.
–
The measurement value must be between 14 V and 30 V.
Restore the correct power supply.
Fan connection poles reversed
–
The fan does not move.
–
Disconnect the power from the unit.
–
Disconnect the fan connection cable from the motherboard.
Operation Guide
Maintenance | en 111
2018.04 | 2.0 | F.01U.130.926