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PAGE 51 of 60 VX2200 TECHNICAL MANUAL VER1.4

TROUBLE SHOOTING GUIDE

ANOMALY FOUND

POSSIBLE CAUSE POSSIBLE SOLUTION

The system has power but the VX2202/.. or

VX2203/.. front panel does not turn on.

1. Interruption or short circuit of the 13Vdc

output on PSU to the outdoor station;

2. PSU defective or fuse blown.

1. Check the GND and +13V connections

on PSU and on VX2202/../ VX2203/..,

then check the protection fuse on the

output of PSU and change it if necessary;

2. Check PSU power supply and in case

change it or take the load off and retest.

The VX2202/.. / VX2203/.. front panel display

shows “ERROR” (VX2202/..only) and the unit

makes acoustic intermittent signals at intervals

of approx. 2 seconds.

1. Probable short circuit on the BUS “─”and

“L” line;

2. Reversion of polarity on the BUS

connection of a phone, videophone or

accessory;

3. VX2202/.. or VX2203/.. programmed as

“Slave” when it should be as “Master”.

1. Check the BUS connections.

2. Check the polarity of the devices

connected.

3. Configure the device as ”Master”

The system, at the moment of the call, is not

able to let the extension ring, the front panel

makes acoustic signals of line engaged and the

display (VX2202/..only) shows “Engaged” or

“Error”.

1. The phone or videophone called is not

correctly connected;

2. The wire section (BUS) is to small;

3. The address programmed on the dip-

switch (of the phone, videophone or

accessory) does not correspond to that

called;

4. The concierge (if present in the system)

has been left in programming mode.

1. Check the right connection of the BUS

2. Increase the wire section or double them

with others available;

3. Check that the address associated to the

call corresponds to that programmed on

the dip-switch of the phone (videophone

or accessory);

4. Remove VX2210 from programming

mode.

The outdoor station makes the call correctly,

but when the user answers, the communication

is cut off.

The wire section is to small.

Increase the wires section or double them with

others available.

During the conversation, when the door is

opened, the communication is cut off.

The wire section is to small.

Increase the wires section or double them with

others available.

The calls goes through, but the conversation is

one-way only.

The supplying voltage on the outdoor station is

too low (under 10.5V).

Increase the supply wires section (GND e 13V)

or double them with others available. Check

voltage output on PSU and adjust in necessary.

The audio level of conversation is too low. The levels of the conversation volumes in both

directions are not appropriately adjusted.

Adjust on the outdoor station trimmers for

microphone and loudspeaker so as to have the

best levels without oscillations (Larsen effect)

The audio level is at its limit or oscillates (

Larsen effect).

The “Balance” trimmer (outdoor station) is not

appropriately set and/or the conversation

volumes are programmed to high.

Adjust on the outdoor station the “balance”

trimmer until the problem is solved and/or

lower the volumes of the microphone and

loudspeaker.

The door opening is not carried out. 1. Lock defective;

2. Connection wrong or interrupted;

3. Wire section to small;

4. Supplying transformer 12Vac defective.

1. Change the lock;

2. Check connection continuity;

3. Increase wires section;

4. Check power supply 12Vca;

The local floor call does not work. 1. Call push button defective;

2. Connection wrong or interrupted.

1. Check defect;

2. Check connection.

The internal video stations do not turn on. 1. Art.893N power supply defective or in

protection;

2. Art.893N is not operated by the outdoor

station during the call (SL terminal);

3. Connection wrong or interrupted.

1. Check the unit and in case change it or

take the supply off for at least 60secs;

2. “-C” terminal of art.893N not correctly

connected to the “SL” terminal of the

outdoor station;

3. Check the continuity of the connection

between the monitor supplying wires and

the videophones interested.

The internal video stations turn on, but the

image does not appear.

1. Art.830NC video camera not supplied or

defective;

2. Connection of the V1-V2 signals

interrupted or wrong.

1. Check and/or change art 830NC;

2. Check connection continuity.

The internal video stations turns on but the

quality of the image is bad or reflected.

1. Signal V1 or V2 not connected or in short

circuit;

2. V1 & V2 signals inverted;

3. Closing resistances are missing at the end

of the BUS video.

1. Check the continuity of the connection

and the isolation to the ground;

2. Check and in case invert the connections;

3. Check and in case apply the closing

resistances on the BUS video.

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