Alcad ALC-041, Manual

Page: 26 / 28

Ne fonctionne pas du tout.
Vérifiez la tension du réseau électrique d'alimentation. Vérifiez
que la tension entre + et – de la source d'alimentation est bien de
17 ± 10% Vdc. Assurez-vous qu'il n'y a pas de court-circuit.
Débranchez l'équipement du réseau électrique pendant 1 minute
et rebranchez-le ensuite. Si le problème persiste, débranchez
toutes les bornes de + et – de la source d'alimentation, et vérifiez
que la tension entre + et – est bien de 21 ± 10%Vdc. Si elle n'est
pas correcte, la source d'alimentation peut être en panne.
Les panneaux d'étiquettes ne s'éclairent pas.
Vérifiez que la tension entre + et – de la source d'alimentation est
bien de 17 ± 10% Vdc. Assurez-vous que l'ampoule n'est pas
grillé.
La plaque de rue n'émet aucun son en appelant.
Contrôlez les branchements entre le groupe phonique et les
boutons-poussoirs. Si vous n'observez aucune anomalie, le groupe
phonique peut être en panne.
L’appel sonne dans les moniteurs/téléphones mais sans entendre
la confirmation de l’appel dans la plaque de rue.
Vérifier le réglage du régulateur de volume audio de la plaque.
Si vous n'observez aucune anomalie, le groupe phonique peut
être en panne.
S'il n'est pas possible de realiser l'appel
Vérifiez que une plaque de rue est bien définie comme plaque
principale du système. Assurez-vous qu’il n’y a pas de court-circuit
entre les branchements D1, D2 du groupe phonique vers les
moniteurs/téléphones. Si c'est le cas, réviser les connexions D3,
D2 de l’équipement de l’installation. Si vous n'observez aucune
anomalie, le groupe phonique peut être en panne.
Si la plaque émet des tonalités intermitentes en appelant
On n’entend pas d’appel sur le moniteur/téléphone: Vérifiez que
le combiné est bien raccroché. Vérifiez que l’interrupteur de
programmation soit en position ON. Contrôlez les branchements
D1 et D2 du groupe phonique vers les appareils. Si c'est le cas,
réviser les connexions D3, D2 de l’équipement de l’installation.
Si vous n’observez aucune anomalie, il se peut que le
moniteur/téléphone ou le groupe phonique soient défaillants.
On n'entend aucun moniteur/téléphone depuis la plaque de rue.
Vérifiez le système de réglage du volume de la plaque. Si vous
n'observez aucune anomalie, le groupe phonique peut être en
panne.
PROBLÈMES DE FONCTIONNEMENT
26
The sound produces feedback.
Adjust the feedback control of the audio unit (see step 1 on page
21). If the feedback persists, lower the volume using the volume
controls of the audio unit.
The electric lock doesn’t work.
With the jumper between terminal 10 and , check that the
voltage between 12 and 11 in the audio unit is 17 ±10% Vdc, by
making a bridge between terminals 22 and 11. If you cannot find
the fault, there may be something wrong with the electric lock.
In installations with multiple points of entry, calling on one of
the entrance panels does not deactivate the other panels of
the system.
Check connections D3 and D2 between the different panels of the
system. If you cannot find the fault, there may be something wrong
with the audio unit.
In housing compound installations, making a call from one of
the external entrance panels does not disable the entrance
panels of the building which is being called.
Check connections D3 and D2 from the entrance panel to the
identifying accessories of the building. If the fault cannot be found,
there may be something wrong with the audio unit or the identifying
accessory.
The video system does not work in any monitor: auto switch-
on, screen doesn´t come on when receiving a call,..
If this is the case, check the mains voltage in the power supply
unit that feeds the monitors. Check that the voltage of the power
supply b and – is 17 ± 10% Vdc. Check the connection
between the terminals – from the power supply unit which feeds
the monitors. Check if there's a short circuit and rectify it. Disconnect
the power supplies supply for 1 minute and reconnect it. If the
breakdown continues, disconnect all the + and – terminals from
the power supply unit and check that voltage b and – is
21 ± 10% Vdc. If it's not correct, there may be something wrong
with the power supply.
Video system does not work in one monitor: auto switch-on,
screen doesn´t come on when receiving a call,..
Check that the ON/OFF switch for the video is in ON position
(on the left). Check that the red led of the monitor is on. Check the
connection between the connection bracket and the monitor. Check
that the voltage b and – of the connection bracket is 17
± 10% Vdc. If failure cannot be found, there may be something
wrong with the monitor.
Poor image quality on all the monitors: distorted picture, ghost
images, loss of synchronisation.
Check the polarity of the twisted pair.
In multiple access installation, check that you have only one
entrance panel defined as the main one. Make sure that the
multiple-access video line is correctly loaded (resistence of 220
ohms in the unused terminals T2+,T2–). If splitters have been used
in the distribution, check that the voltage b and – of the
splitters is 17 ±10% Vdc. Check that twisted pair line has a 120
Ohm load: a) if tap-offs have been connected in series the 120
Ohm resistance must be removed from all the intermediate tap-
offs; b) with monitors in series cut the 120 Ohm resistances on all
the connection brackets, but from the one at the end of the line.
Check twisted pair connection in splitters and tap-offs. If you
cannot find the fault, there may be something wrong with the
video unit.
Poor image quality on one monitor: distorted picture, ghost
images, loss of synchronisation.
Check the polarity of the twisted pair.
Check that twisted pair line is charged with 120 Ohm: with
monitors in series cut the 120 Ohm resistances on all the connection
brackets, but from the one at the end of the line. Check the position
of the J1 configuration jumper in the connection brackets. If you
cannot find the fault there may be something wrong with the
monitor.
Auto switch-on does not work on any monitor.
In multiple access installations, check that one entrance panel has
been defined as the main one and check connections D3 and D2
between different entrance panels. If you cannot find the fault
there may be something wrong with the audio unit.
Auto switch-on does not work on one monitor.
Check that pushing the auto switch-on button the red led flash.
Check that the system is not engaged. If you cannot find the fault,
there may be something wrong with the connection bracket or the
monitor.
White picture in all the monitors
Check that the twisted pair to the monitors is connected to the T1+
and T1– terminals of the video unit. In multiple access installation,
check the T2+, T2– connections of the twisted pair between the
different video units. Check the connection between the video and
the audio units. If splitters have been used in the distribution, check
that the voltage b and – of the splitters is 17 ±10% Vdc.
Check the connections of the twisted pair from the video unit to
the monitors. If failure is not detected, there may be something
wrong with the video unit, any tap-off or any splitter.
White picture in one monitor
Check the connection between the connection bracket and the
monitor. Check the connections of the twisted pair in the monitor's
connection bracket. Check twisted pair's connection from the
connection bracket to the video unit. If failure is not detected there
may be something wrong with the tap-off, connection bracket or
monitor.
VIDEOPORTERO DIGITAL - DIGITAL VIDEODOOR ENTRY SYSTEMS - VIDÉOPORTIER NUMÉRIQUE