Troubleshooting - Bosch CCS 800 Ultro Installation And Operating Manual

CCS 800 Ultro | Installation and Operating Manual
8

Troubleshooting

Temporary no microphone reaction, and no sound or
distorted sound from unit loudspeakers
• Possible cause
Trunk-line overload.
• Solution
Reduce load on the trunklines by reducing the
number of units, and/or the length of the trunk
cables.
Acoustic Feedback
Possible cause
•
Loudspeaker volume too loud.
• Solution
- Reduce gain using volume control for delegate/
chairman unit loudspeakers on CU.
- If available, switch on Digital Acoustic Feedback
Suppression.
• Possible cause
Distance between units too small (microphone to
loudspeaker of other units).
• Solution
- Increase distance between units.
- If available, switch on Digital Acoustic Feedback
Suppression.
• Possible cause
Too close to microphone units, when using open
headphones.
• Solution
- Increase the distance between headphone and
microphone or disconnect headphones when not
in use.
- If available, switch on Digital Acoustic Feedback
Suppression.
Bosch Security Systems B.V. | 2007-08
Part of system not working
• Possible cause
Interrupted trunk-line cabling.
• Solution
Check the trunk-line cabling connections between
the units and the CU, also use the test function on
the CU.
No sound via delegate/chairman loudspeakers
• Possible cause
Insertion switch in wrong position.
• Solution
Check if insertion switch at the rear of the CU is in
position "1".
• Possible cause
Volume control position.
• Solution
Check if the volume control for delegate/chairman
loudspeakers on the CU is not in the fully counter
clockwise position.
• Possible cause
Microphone active or headphone connected.
Note
Units with active microphone or connected
headphone(s) have their loudspeakers switched
off.
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