System problems
Problem Hint
Noise can be heard in the system. Earth the system at one point only (refer
to DCN-CCU2 and DCN-CCUB2 Central
Control Units, page 183).
The system does not operate correctly, but you
do not know what the problem is.
– An ‘open-ended’ DCN cable without a
cable termination plug can cause the
problem. Connect cable termination
plugs to all ‘open-ended’ DCN cables.
– A transmitter which was connected
while being switched on can cause
the problem. Switch the transmitter
off and on.
DCN-CCU2 and DCN-CCUB2 Central Control Unit
Problem Hint
– You cannot start the CCU – The central control unit is not
connected to a mains power supply.
– The CCU does not control the video
cameras correctly.
– The RS232 port of the central
control unit are not configured
correctly. Refer to DCN-CCU2 and
DCN-CCUB2 Central Control Units,
page 183 for instructions that tell
you how to configure the RS232 port
of the central control unit.
– A trunk does not receive power from the
system and the overload LEDs on the CCU
or the extension power supply do not come
on.
– The trunk is disconnected from the
CCU or extension power supply.
– The trunk contains a defective
extension cable. Find the defective
extension cable and replace it.
– The system mode of the CCU is set
to Standby or Off on front panel of
the CCU or conference software.
– The trunk contains a defective
extension cable. Find the defective
extension cable and replace it.
– A trunk does not receive power from the
system and the overload LEDs on the CCU
or the extension power supply are on.
– The devices that are connected to
the trunk ask for too much power.
Use the calculation tool to re-
calculate the power consumption of
the devices and the extension cables
that are connected in the trunk.
9.2
Conference System Troubleshooting | en 261
Bosch Security Systems B.V. Operation Manual 2013.11 | V2.0 | DCN-NG_OM_V4.x
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