Corrective Maintenance; Device Replacement; System Controller - Bosch PRAESENSA Installation Manual

182 en | Maintenance and service
19.2

Corrective maintenance

In case of fault reports, a qualified technician should perform:
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19.3

Device replacement

In case one of the PRAESENSA devices in a system needs to be replaced, it is important to
follow a strict sequence of actions to minimize down‑time of the system or part of the system.
The required actions differ per type of product.
19.3.1

System controller

To replace a defective system controller PRA-SCx in a running system proceed as follows:
Prepare the new system controller
1.
2.
3.
4.
5.
Exchange the system controller
1.
2.
3.
4.
5.
6.
7.
8.
2019.11 | V1.00 |
– Check the amplifier load conditions for any changes compared to the previous
measurement. A new load measurement will result in audible test tones in the zones
under test. Preferably do the measurement when the zones are not occupied or
announce upcoming tests to the occupants.
– Check the battery impedance of all connected batteries for any change compared to
the previous measurement. This allows for timely detection of battery aging.
Fault analysis;
Elimination of the part that causes the failure;
Replacement of the part;
Test of the associated functions.
Unpack the new system controller.
Supply power to the new system controller using any available 24 VDC power supply (e.g.
a PRA-PSM24 or a PRA-MPSx with an unused 24 V output).
Connect a (laptop) PC to the new system controller.
Start the PRAESENSA Firmware Upgrade Tool (FWUT) and upgrade the new system
controller to the required firmware version; this is the same version as the system is
running in which this system controller will be used.
– See the PRAESENSA configuration manual.
If the original configuration backup file and the message files are available on the
installation PC, including the security keys, upload the system configuration backup file
and the individual message files to the new system controller.
– See the PRAESENSA configuration manual.
Disconnect all cables from the original system controller.
Remove the original system controller from the rack and put the new system controller in
the rack.
Connect all cables to the new system controller.
Connect the PC to the system, either to a spare port of the system controller or to one of
the PRA-MPSx.
Depending on the availability of a backup configuration:
– In case the backup from the old system was uploaded to the new system controller,
update the configuration with the correct hostname of the new system controller.
– In case no backup was available, start a new system configuration as described in
the PRAESENSA configuration manual.
Restart the application on the new system controller.
Perform a system test.
Make a backup of the new configuration and store on a safe location.
Installation manual
PRAESENSA
Bosch Security Systems B.V.