Sennheiser ADN C1 - If a Problem Occurs

If a problem occurs ...
150 | ADN Digital Conference System
If a problem occurs ...
Conference system
Problem Possible cause Possible solution Page
ADN CU1 central unit and/or
ADN PS power supply
cannot be switched on
No connection to the mains power
supply.
Connect the ADN CU1 central unit and/
or the ADN PS power supply to the
mains power supply.
24
ADN PS power supply
cannot be switched on
No connection to the central unit. Correctly connect the ADN PS power
supply to the ADN CU1 central unit and
switch the central unit on.
31
ADN PS power supply can be
switched on but cannot be
detected by the conference
system
Too many ADN PS power supplies used
in the conference system.
You can use a max. of 15 ADN PS
power supplies in a conference system.
Reduce the number of ADN PS power
supplies.
–
Conference unit cannot be
used/activated
The conference unit is not connected
correctly.
Check if all plugs are connected
correctly.
29
The cable string/cable ring is too long. Reduce the length of the cable string/
cable ring or reduce the number of
conference units.
15
The maximum number of requests to
speak has been reached.
Increase the maximum number of
requests to speak.
52 or 128
The ADN C1 chairperson unit has not
been initialized before use.
If chairperson units are connected
afterwards, you have to initialize
them.
54 or 124
Too many ADN C1 chairperson units
used in the conference system.
You can use a max. of 10 chairperson
units in a conference system. Since
each chairperson unit reduces the
max. possible number of speakers
(“Microphone Limit”), reduce the
number of ADN C1 chairperson units.
51 or 127
Too many conference units used in the
conference system.
You can use a max. of 400 conference
units in a conference system. Reduce
the number of conference units.
–
The central unit’s display
panel displays error icons/
the display panel lights up
red
Changes or errors have occurred. Check the possible causes indicated by
the icons.
59
Volume of the conference
units’ loudspeakers is too
high or too low
The processing of the conference units’
audio signals (“Audio Gain Reduc-
tion”) is adjusted so that the gain of
each additional channel is reduced too
much or too little.
Adjust the processing of the confer-
ence units’ audio signals.
56 or 131
The floor channel volume is not
adjusted correctly.
Adjust the floor channel volume. 76, 130 or
140
Loud hissing at the confer-
ence units’ loudspeakers
The conference units are placed too
close together.
Increase the distance between the
individual conference units to at least
50 cm.
–
The floor channel volume is adjusted
to a very high level.
Reduce the floor channel volume. 76, 130 or
140
The “Feedback Suppression”
function for eliminating feedback
is deactivated.
Activate the “Feedback Suppression”
function (“Low Intensity” or “High
Intensity”).
57 or 132