Flashes - Error: Programming Error; Flashes Or 7 Flashes - Error: Internal Error 1 Or Internal Error; Flashes: Unit Initialization; Detector Module And Alarm Transmission - Bosch FCS-320-TP2 Operation Manuals

Aspirating Smoke Detector
8.2.5

5 Flashes - Error: Programming Error

In operation with two detector modules, both LEDs flash. The motherboard is faulty and must
be replaced with a new board.
8.2.6

6 Flashes or 7 Flashes - Error: Internal Error 1 or Internal Error 2

If only one LED flashes in operation with two detector modules, the associated detector
module is probably faulty. When troubleshooting, the following steps should be carried out in
the specified order.
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8.2.7

8 Flashes: Unit Initialization

This display does not indicate an error. The LEDs flash during the initialization phase, after the
power supply has been connected, to indicate that the system is starting. During the
initialization phase, the detector is unable to detect smoke.
8.3

Detector Module and Alarm Transmission

Proceed in accordance with Testing the Detector Module and Alarm Transfer, page 105. Also
check the detector module visually for exterior contamination or damage and replace as
necessary.
Notice!
A hardware defect in the detector module is indicated by a permanently-lit detector module
LED.
Bosch Sicherheitssysteme GmbH
– If the error reoccurs, the first detector module is faulty.
– If you are using two detector modules, repeat the process with the second detector
module.
Replace the faulty detector module.
Incorrect detector module in use.
– Ensure that you are using a suitable detector module.
If a detector module is unsuitable, replace it with a suitable one.
Faulty connection cable between motherboard and detector module.
– Disconnect the power from the unit.
– Replace the connection cable with a new one.
– Restore the operating voltage and run the unit for a few minutes.
– If the malfunction no longer occurs, the faulty connection cable was responsible for
the error.
Replace the faulty connection cable.
Detector module faulty
– Disconnect the power from the unit.
– Replace the detector module with a new one of the same type.
– Restore the operating voltage and run the unit for a few minutes.
– If the error does not reoccur, the detector module was faulty.
Replace the faulty detector module.
The motherboard is faulty.
– If you are using two detector modules, both diagnostics LEDs flash.
– 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 error does not reoccur, the motherboard was faulty.
Operation Guide
Maintenance | en 113
2018.04 | 2.0 | F.01U.130.926