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There is no audio
communication or it is of
bad quality in all the
dwellings.
There is no support
illumination in the camera
module.
There is no image on any
monitor or the quality is
bad in all of them.
Check the voltages in the following bushing insulators of the audio control unit:
1M – 2M = 17Vdc
3M – 2M = 17Vdc
If voltages are correct and the problem persists, then the audio control unit might be broken.
In the case that any of the above-mentioned voltages do not correspond to that indicated, disconnect
cables 1M, 2M and 3M of the audio control unit and verify again. If metering is then correct, revise the
connections of the 1M, 2M and 3M wires in the housing units and the installation’s splices in order to
discard cable crossings or short-circuits. We recommend that the installation be disconnected per spans
in order to find the problem.
If voltages are still incorrect with cables 1M, 2M and 3M disconnected, then disconnect cables 1 and 2
in the power supply and verify the voltages in the input (220 Vac) and output (17Vdc) bushing insulators.
If the output is not metered at 17Vdc, then the power supply might be broken.
If the power source is working correctly but the street panel continues to be free of voltage, then verify
installation of cables 1 and 2. If it is correct, then the audio control unit might be broken.
If the power supply works correctly but there is still no voltage at the street panel, check the installation
of cables 1 and 2. The audio control group may be faulty if it is correct.
Check the sound volume in the street panel and dwelling with the street panel’s audio control unit
potentiometers. We recommend that both potentiometers be adjusted at a point standing around 2/3 of
its total run.
Check that voltage between 1M and 2M connections in the housing units is not inferior to 14Vdc while
communication is maintained.
If all the above-outlined verifications are correct, then the audio control unit might be broken.
If installation of the video door entry system corresponds to black and white, then it is not a breakdown,
given that the support light consists in infrared rays, which are imperceptible by the human eye.
In the contrary case, when dealing with color video door entry systems, the camera may be broken down.
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