Bellcome Standard 3.5”VIDEOTÜRSPRECHANLAGEN SET1 Familie Benutzerhandbuch Seite 32

7
TROUBLESHOOTING
EN
No.
Problem
The system doesn`t work.
1.
The system works OK.
2.
The system works without
3.
video, for a limited time.
The system doesn`t work.
4.
The system works OK,
but the voltages measured
to the VTT connectors are
lower than 11 Vd.c.
5.
+14 V – GND < 11 V
+Uv – GND < 11 V
(ch. 5.5)
The call from the
outdoor panel (VPT)
doesn`t function.
6.
U = 0V or 5V
CD
(ch. 5.5)
The terminal (VTT)
doesn`t ring when
7.
called from the
outdoor panel (VPT).
SCU signals
Possible causes
S1
The system has NO power supply from
S2
the 230 Va.c./ 50 Hz network and there
S3
is no battery connected to the SCU.
PROG
S1 green
System OK.
S2 green
S3
No battery (max. 7 Ah) connected
PROG
to the central unit (SCU).
With battery (max. 7 Ah) connected to
S3 green
the central unit (SCU).
The battery is during charging
S3 red
or defect.
The system has no power supply from
S1
the 230 Va.c./ 50 Hz network or the
S2
fuses are burned (the systems works
S3 green
only on battery, with the basic features:
PROG
door opening and talk).
S1 red
Short circuit between +14V and
S2 red or green
S3
GND and/or GNV and +Uv.
PROG
Only 1 wire connected on +14V
and GND terminals, instead of 2
wires, as shown in the connection
diagram.
S1 green
The cable length in the system
S2 green
is higher than 150 m.
S3
The installation was made with a
PROG
different cable from the one
recommended, with a higher
resistance - >8 W /100m.
The CD connection could be:
- incorrectly connected or in short
circuit with +14V, +Uv, GND or GNV
S1 green
- interrupted or not connected to
S2 green
VPT, SCU or VTT.
S3
PROG blinking
VPT is not programmed with
red
address 1.
The CD connection may be interrupted
between SCU and VTT.
S1 green
VTT is not programmed with address 1.
S2 green
S3
The terminal (VTT) doesn`t
PROG
signal with [ ] when the keyboard is
touched.
BEEP
30
Potential solutions
Check the power supply of SCU
from the 230 Va.c./ 50 Hz network or
the fuses status. Check FUSE on the
entry in SCU.
The battery must be replaced if the S3
LED doesn`t turn green after 5 hours.
Check the power supply of SCU
from the 230 Va.c./ 50 Hz network or
the fuses status. Check FUSE on the
entry in SCU.
Check the connections between +14V
and GND and/or GNV and +Uv.
Correct any errors.
The 2nd wire must be connected
to +14V or GND, as shown in
the connection diagram.
We recommend the installation of
a video amplifier (DVA) before or
after SCU. An additional cable of
3 x 0,75 mm is required.
2
Check CD everywhere in the
system and correct any errors.
Program VPT with address 1, see the
procedure (ch. 6.4.2.).
Check CD connection of SCU, and
VTT and the continuity of the wire.
Correct any errors.
Program VTT with address 1, see the
procedure (ch. 6.5.3.).
Check +14, GND connections of SCU
and VTT and the continuity of
the wire. Correct any errors.