Problem Hint
– A multi CCU system does not operate
correctly, but you cannot tell what the
problem is.
– Check whether each sub system
operates correctly in single CCU
mode (refer to DCN-CCU2 and DCN-
CCUB2 Central Control Units, page
183).
– Disturbance on the optical network
caused by connecting a device in a
running system could cause a
problem. If the problem persists:
switch off and on one by one all
devices connected with the optical
network, starting with the master
CCU (refer to Optical network design,
page 77).
– The display shows: Download WAP
– The WAP contains an incompatible
Software version. Download the
software version as used on the CCU
to the WAP via the DLT program.
– The display shows: Bad Signal – a bad signal of the wireless
discussion units is notified.
– Move the unit closer to the WAP.
– Check for other WiFi networks.
– The display shows: Low Battery – a low battery for a wireless
discussion unit is notified.
– Replace or charge the battery.
– More bad signal warnings then expected on
display CCU or in DCN-SWSMV
– In case of heavy disturbance on
2.4GHz, the system informs the
operator with a bad signal warning
on display CCU or in DCN-SWSMV. In
case more investigation is needed, it
is possible to analyze the logging file
of DCN-SWSMV.
262 en | Troubleshooting Conference System
2013.11 | V2.0 | DCN-NG_OM_V4.x Operation Manual Bosch Security Systems B.V.