Bosch Security Systems | 2003-06 | 3922 988 54284
CCS 800 Ultro | Installation and Operating Manual en | 17
7 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 CPSU.
- 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.
Part of system not working
• Possible cause
Interrupted trunk-line cabling.
• Solution
Check the trunk-line cabling connections between
the units and the CPSU, also use the test function on
the CPSU.
No sound via delegate/chairman loudspeakers
• Possible cause
Insertion switch in wrong position.
• Solution
Check if insertion switch at the rear of the CPSU is
in position "1".
• Possible cause
Volume control position.
• Solution
Check if the volume control for delegate/chairman
loudspeakers on the CPSU 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.
