Alcad Kits Manual De Instrucciones página 24

VIDEOPORTERO DIGITAL - DIGITAL VIDEODOOR ENTRY SYSTEMS - VIDÉOPORTIER NUMÉRIQUE
TROUBLESHOOTING
To program the devices (monitors/telephones), check that the J1
jumper is fitted to the audio unit on the entrance panel. Check that
before pressing the push button of the entrance panel, the audio is
activated between the device and the entrance panel. Remember that
the panel emits a confirmation tone once the monitor/telephone has
received the code (device programmed). If the monitor/telephone
cannot be programmed: Check the connection between 7 in the
audio unit and the push buttons , the connection between the push
buttons and the concentrator of calls and the connection between the
concentrator of calls and the audio unit.
Nothing works.
Check the mains voltage in the power supply unit that feeds the
audio unit. Check that the voltage between
supply is 12 Vac. Check for the existence of a short circuit and
rectify this. Disconnect the power supply for 1 minute and then
reconnect it. If the breakdown continues, disconnect all the
power supply and V terminals, and check that the voltage
between and V is 12 Vac. If you cannot find the fault, there
may be something wrong with the power supply.
The card holder do not light up.
Check that the voltage between
that supplies the audio unit is 12 Vac. Check that the voltage
between 9 and 10 in the audio unit, with the lighting push button
activated, is 12 Vac. Check whether the lamp is burnt out.
The lighting push button pilot does not light up.
Check that the voltage between
12 Vac. If the voltage is correct, there may be something wrong
with the audio unit.
You cannot hear any sound on the entrance panel when
a call is made.
Check the connection between 7 in the audio unit and the push
buttons. Check the connection between the concentrator of calls
and the push buttons and between the concentrator of calls and
the audio unit. Check that the call tone rings on the
monitors/telephones. If you cannot find the fault, there may be
something wrong with the concentrator of calls or the audio unit.
If the red indicator light flash continuosly.
Check wether there is a short-circuit in the connections from the
audio unit to all the devices, D1 and D2. If you cannot find the
fault, there may be something wrong with the audio unit.
If intermittent tones can be heard on the entrance panel
when a call is made.
The call tone cannot be heard on the monitor/telephone: Check
that the handset is not off the hook. Check that the programming
switch of the device is in ON position (on the left). Check
connections D1 and D2 from the audio unit to all the devices.
If you cannot find the fault, there may be something wrong with
the monitor/telephone or the audio unit.
No monitor/telephone can be heard from the entrance
panel.
Check the volume control on the panel. If you cannot find the
fault, there may be something wrong with the audio unit.
One monitor/telephone cannot be heard from the entrance
panel.
Check connections D1 and D2 from the device to the audio unit.
If you cannot find the fault, there may be something wrong with
the device.
You cannot hear the entrance panel on any
monitor/telephone.
Check the volume control on the devices (on the panel). If you
cannot find the fault, there may be something wrong with the
audio unit.
Y o u c a n n o t h e a r t h e e n t r a n c e p a n e l o n a
monitor/telephone.
Check connections D1 and D2 from the device to the audio unit.
If you cannot find the fault, there may be something wrong with
the device (monitor/telephone).
The sound produces feedback.
Lower the sound level using the volume control on the audio
24
y V of the power
and V of the power supply
and V in the audio unit is
unit.
The electric lock doesn't work.
Check that the voltage between 11 and 12 in the audio unit,
when you press the lock release button, is 12 Vac. If you cannot
find the fault, there may be something wrong with the electric
lock.
The video system does not work in any monitor: auto
switch-on, screen doesn´t come on when receiving a
call,..
Check the mains voltage in the power supply unit that feeds
the monitors. Check that the voltage of the power supply
between - and + is 15 Vdc. Check the - connection between
the power supply and the audio unit. Check if there's a short
circuit and rectify it. Disconnect the power 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 between - and + is 15 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 between - and + of the
connection bracket is 15 Vdc. If you cannot find the fault,
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.
Check that twisted pair line has a 120 Ohm load. With
monitors in series cut the 120 Ohm resistances on all the
connection brackets, but from the one at the end of the line.
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.
Check that on the entrance panel, the J1 jumper is fitted to
the audio unit. 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. Check the
connection between the video and the audio units. 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.
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 connection
bracket or monitor.