V-Tec VIDEO DOOR PHONE SYSTEM Manual descargar pdf (Pagina 9)

INSTALLATION DIAGRAMS

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DOOR PHONE - VIDEO DOOR PHONE SYSTEMS: Installation Diagrams

INSTALLATION DIAGRAMS

OPERATING ANOMALIES

The power supplies have two negative outputs: “-” and “-J”. The latter

has a series impedance. If, during the installation, a connection is

made on the ﬁ rst output instead of on the second “-J”, the system will

not work since the impedance function is missing.

SYSTEM CHECK AND POSSIBLE FAILURES

OUTDOOR STATION SYSTEM CONTROL

1) Check that voltage between (+) and (-) terminals is of 6V. If voltage

is normal, there should not be:

a) Any badly connected door phone.

b) Any door phone with permanently unhooked handset.

To make sure that all house phones are properly connected, it is

necessary to measure if between “+” and “1A” and “2” terminals

voltage is present.

Under normal conditions, there should be no voltage. If, on the

contrary, voltage is present, it means that in one or more house

phones both the microphone and the receiver are permanently

inserted.

2) Disconnect “+”, “1A” and “2” terminals wires from the loudspeaking

unit and measure with the ohmmeter between wires 1A and 2:

• If the result is inﬁ nite the system is in order.

• If there is a resistance of about 100 Ohms, some door phone is

always connected.

• If the result is 0 Ohms, wire 1A and 2 are in short circuit.

To verify the efﬁ ciency of the loudspeaking unit, wires 1A and

2 coming from the installation, must be disconnected and a

provisional connection must be made on a perfectly working

door phone; if the conversation is audible, the fault will have to

be found somewhere else. To locate faults it is necessary to pro-

ceed upwards on the cable conduit.

1- OR 2-USER BASIC VIDEO DOOR PHONE SYSTEM

TROUBLESHOOTING AND SOLUTIONS

1) No conversation can be established with the door unit: the call

tone is heard on the monitor but the monitor does not light up.

Short-circuit between output terminals: the power unit protection

has tripped; disconnect power (230 Vac) and carefully check the

system wiring again.

2) No conversation can be established with the door unit: no call tone

is heard on the monitor and the monitor does not light up. Check:

• Connection between panel button and monitor CA terminal.

• Connection between power unit terminal PS and panel button

common.

• No short-circuit on power unit “PS” terminal.

3) A conversation can be established with the door unit: the call tone

is heard on the monitor but the monitor does not light up.

Check:

• Presence of voltage (18-20 Vdc) between monitor terminals

“R2” (+) and “R1” (-).

4) A conversation can be established with the door unit: the call tone

is heard on the monitor, the monitor does not light up but the

screen is blank.

Check:

• Presence of voltage (16-18Vdc) between camera terminals

“+TC” “R1”.

• Possible coax interruption or short-circuit.

5) No conversation can be established with the door unit: the call

tone is heard on the video door phone and the camera picture

appears.

Check:

• Presence of voltage (6Vdc) between door unit terminals “+6”

and “-6”.

6) The system works correctly but the door lock cannot be released.

Check:

• Continuity between video door phone “9” and video power unit

“AP” terminals.

All diagrams in this volume can be downloaded from the web site at

www.urmetdomus.com, technical diagram area.

REDUCING ARCHITECTURAL BARRIERS

In buildings intended for social activities, such as schools, hospitals,

health care centres, cultural centres, etc., and in all other buildings

where technical precautions are needed to ensure accessibility by

disabled persons, the door phone and video door phone systems must

be installed so to be conveniently used by everyone.

Speciﬁ cally, avoid installing apartment stations in difﬁ cult to reach

points. Install so that the distance between the ﬂ oor and the upper part

of the microphone is 100cm.

The panel outside the building must be installed as close as possible

to the height of a wheelchair user’s face: the recommended height is

from 115 to 125cm from the ﬂ oor.

115 ÷ 125 cm100 cm

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V-Tec VIDEO DOOR PHONE SYSTEM Manual Pagina 9

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