19
8 GbD-'02
WORKING INSTRUCTIONS /
TROUBLESHOOTING
Basic systems
For all the intercom systems, simply lift the
handset to speak to the door station. The call
is indicated by an audio signal (a buzzer or an
electronic bell).
To activate the door release, press the push-
button with the key symbol. In systems with two
or more entrances the communication and
door release are switched automatically on the
entrance from which the call is made while the
other entrances are isolated.
Systems with private conversation module
In all standard intercom systems (not inter-
communicating) a private audio system can be
provided (only the intercom which has been
called can speak to the door station) by install-
ing the “private conversation module" art.SM50
in every intercom. Since the buzzer rings, the
user has about 40 seconds to lift handset and
answer. There is no time limit for the private
conversation. When the handset is replaced
the system returns to the rest condition. If a
user does not replace the handset properly,
the next call from another intercom, automati-
cally cuts him out of the audio connection with
the door station.
Intercommunicating systems
Intercommunicating systems allow users to
speak to one another by simply lifting the
handset; any user can join in to a conversation
already in progress. To avoid interferences it is
necessary to observe the following instruc-
tions.
Lift the handset, make sure that there is not a
conversation already in progress, then press
the call push-button corresponding to the de-
sired user.
Intercommunicating systems connected to
door station
Such systems allow conversation between two
or more inside users with the exclusion of the
door station, or between one inside user and
the door station.
When there is a call from an external push-
button panel the audio line of the electric door
speaker is activated automatically; when one
calls from one of the intercoms, the internal
intercommunicating audio line is automatically
activated.
The user called has simply to lift the handset.
Any user can join in to a conversation already
in progress.
To avoid interferences it is necessary to ob-
serve the following instructions:
lift the handset, make sure that there is not a
conversation already in progress, then press
the call push-button corresponding to the de-
sired user.
As it is shown in the connection diagram,
internal calls have a sound (electronic) distinct
from external calls (buzzer). The electronic
sound is obtained by means of the electronic
bell module art.SR40 installed inside the inter-
com. To activate the electric lock it is neces-
sary to push the push-button with a key symbol
on. By performing this operation the system
returns to the intercommunicating service with
the audio exclusion of the door station.
Preliminary checks
- Check for the presence of the mains voltage
in the terminals 230Vac (or 127Vac) of the
power supply.
- The power supply is not provided with fuses,
but it is protected against overloading or short-
circuiting by a heat sensor (thermoprotector),
to restore power, it is necessary to cut off the
mains voltage for about one minute. Recon-
nect power after having repaired the fault.
- Check the voltage output of the power supply
(see in detail the values indicated in the power
supply chapter).
- Check that the cross section of the cables
corresponds to what is indicated on page 18
and in the descriptions of each individual dia-
gram.
Fault and probable damage
Nothing at all is working
Absence of main voltage. Short-circuit or over-
load of the terminals of the power supply
output. Faulty power supply.
The lock does not work
Faulty lock. The cross section of the cables
indicated in bold type is insufficient. A connect-
ing cable to the lock has been interrupted.
Faulty power supply.
Calls from the door station do not activate
The common connection of the push-buttons
on the push-button panel has been interrupted.
A call to an individual intercom does not
activate
The connecting wire from the door station to
the intercom has been interrupted. The inter-
com buzzer is faulty or badly set. In intercoms
with electronic call check that the handset is
hung up correctly.
No sound from either channel
Absence of power between 3 (+) and 4 (
-
) of
the electric door-speaker (6÷8Vdc). Short-cir-
cuit between + and
-
of the power supply.
Faulty power supply.
No sound from the intercoms to door sta-
tion
Connection 1 from the intercoms to the electric
door-speaker has been interrupted or short-
circuited. There is no ground connection to
terminal 4 of the electric door-speaker (ampli-
fier). Faulty electric door-speaker (amplifier).
No sound from the door station to the inter-
coms
Connection 2 from the intercoms to the electric
door-speaker (amplifier) has been interrupted
or short-circuited. Faulty electric door-speaker
(amplifier).
Sound with humming in the background
(50/60Hz)
The cables have been canalized together with
cables supplying a/c high absorption loads.
Separate the ground connection of the electric
door-speaker (amplifier) and of the name plate
lamps; a conductor from
-
(minus) of the power
supply to 4 of the electric door-speaker (ampli-
fier), another conductor from
-
(minus) of the
power supply to the lamps. Faulty power sup-
ply.
At the door station a whistle is heard
(Larsen effect)
The electric door-speaker (amplifier) is badly
housed in the push-button panel; the micro-
phone has to be stuck to plate. Lower the
volume.
Radio reception on the door station
The defect can occur when there is a transmit-
ter working in the proximity. Apply a condenser
from 0.1µF between terminals 1 and 3 of the
electric door speaker (amplifier).
Intercommunicating systems
No sound in either channel. Intercommuni-
cating phone not working
Short-circuit between + and
-
of the power
supply. Faulty power supply.
Calls from the door station activate. No
sounds in either channel. Intercommuni-
cating phone is working
No power supply between 3 (+) and 4 (
-
) of the
electric door-speaker (8Vdc). Faulty power
supply.
No sounds from the intercoms to the door
station
The connection between 1 of the intercoms
and G of the power supply has been inter-
rupted. The connection between D of the power
supply and 1 of the electric door-speaker (am-
plifier) has been interrupted. Faulty electric
door-speaker (amplifier). Faulty power supply.
No sounds from the door station to the
intercoms
The connection between 2 of the intercoms
and 2 of the power supply has been inter-
rupted. The connection between C+ of the
power supply and 2 of the electric door-speaker
(amplifier) has been interrupted. Faulty electric
door-speaker (amplifier). Faulty power supply.
The intercommunicating calls activate, but
the door station is still on
Check that cable 7 is connected to 7 of the
power supply and not to terminal
. Faulty
power supply.
The intercommunicating calls do not acti-
vate
Check that cable 7 is connected to 7 of the
power supply. Faulty power supply.
No sound in the intercommunicating serv-
ice
Faulty power supply.
System with more entrances
Entrance A is never activated
Short-circuit between 5 and 6 of the exchanger.
Faulty exchanger.
Entrance B is never activated
Short-circuit between 3 and 4 of the exchanger.
Faulty exchanger. No power supply to 1 and 2
of the exchanger (12Vac).
