130
TROUBLESHOOTING HINTS
A
A
O
w
w
w
O
w
O
w
O
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O
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O
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O
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w
n easy way to check that the system is working properly is to disconnect the wiring from the door
panel and to check the monitor/telephone directly connected to the sound module.
short circuit between different terminals of the installation will never damage the connected
systems.
Nothing operates.
Remember that the system remains inactive for 45 seconds after connecting the power supply,
the same occurs upon connecting any unit to the installation.
Check the output power supply voltage between ' - ' and '+' terminals: it should have 17,5 to
18,5Vd.c. If not, disconnect the power supply from the installation and measure again. If
it's correct now, it means there is a short circuit in the installation: Disconnect the power
supply from mains and check the installation.
Check that 'A/D' terminal is not shortcircuited with ' - ' or '+' terminals.
Inappropriate audio level.
Adjust the level volumes as shown on page 100. In case of feedback, reduce the audio levels
until feedback fade out. If feedback doesn't disappear refer to the following hint.
Continuous audio feedback.
Check that 'A/D' terminal is not shortcircuited with other terminals.
Door open function no operates.
Remember that this function is only available during call and communication progresses.
The CV1 and CV2 terminals for door opening are voltage free outputs. The cable requires a
connection depending on whether 12Vdc or 12Vac is needed, as shown on page 117-
124.
Make a short circuit between the 'CV1' and 'CV2' terminals on the sound module; there should
be12V (d.c. or a.c. depending on the type door release installed) between the terminals on
the door release. If so, check the lock release and its wiring.
The system cannot be programmed.
Check that the switch number 2 of the configuration dip switch is set to ON (see page 99) and
that the programming steps are correctly followed.
Check that 'A/D' terminal is not shortcircuited with other terminals.
Some units don't receive calls.
Remember that each apartment must have a master unit only. Check that the units are
switched on and correctly programmed.
No video image.
Check that dip switch 4 on the EL631/R5 module is set to ON.
Check that power is reaching the distributors, the voltage between the '+' and '-' terminals
must be between 15 to 18Vd.c.
Push buttons don't work.
When the push button is pressed check that the door panel emits a confirmation tone, if not,
check the wiring of the push buttons (pages 97 to 98).
If there is a confirmation tone, check the programming of the monitors or telephones (pages
107 and 110).
129
OPTIONAL CONNECTIONS
E
xternal lock release activation.
The lock release can be activated at any moment by using an external push button, that must be
connected between 'CV1' and 'CV2' of the door panel.
This function will allows to exit from the building being not necessary the use of a key.
d.c. Lock release
TF-104 and a.c Lock release
A
.
dditional call repeater connection
The SAV-90 call repeater unit allows the call on the monitor to be repeated in another part of the
apartment.
The total number of elements per apartment (monitors, telephones, call repeaters,
etc.) must never exceed two units.
REMEMBER:
SA
+
SAV-90
R. Line
A/D
+
_
SA
Vi+
Vi-
+
_
A/D SA
+
SA
+
SAV-90
T-730/R5
CV1 +12
CV2
-
CV1 +12
CV2
-
EL 631/R5
EL 640/R5
EL 631/R5
EL 640/R5
TF-104
SEC
PRI
Main
~ ~ ~ ~
Tekna R5
