RiTTO TWINBUS, Системное руководство

Страница: 187 / 197

Service speech
187
Service
No call signal for
indoor telephones 1 7650
or
indoor video station
1 7825, 1 7826 or
handsfree video intercom
units
1 7835, 1 7845.
The door is opened by the
pressing of the doorbell. Automatic door opener
activated. Deactivate automatic door
opener. Refer to Page:
☞
160
for indoor telephone
1 7650;
☞
165
for indoor video
station
1 7855;
☞
169
for handsfree video
intercom units 1 7835,
1 7845.
Door opener not working. At power supply unit 1 7573
, the target voltage of 11 V
AC is not present between
terminals 3 and 21 when
operated. Short-circuit in lines
3 and 21.
Remedy short circuit.
Target voltage of 11 V AC
not present at door opener
when operated Open circuit in line to door
opener. Check and repair line.
Door opener defective. Replace door opener.
No illumination of door
station.
At power supply unit 1 7573
, the target voltage of 11 V
AC is not present between
terminals 3 and 4 and/or, at
door intercom module
1 4760, the target voltage of
11 V AC is not present
between terminals 3 and 4. Short circuit between
terminals 3 and 4 or the
lines. Remedy short circuit.
Open circuit in line to door
station Check and repair line.
Alternating current
overload. Also, use mains
transformer 1 6477 with 7
modules or more or
constant load of more than
700 mA.
Lighting defective. Replace lighting.
No speech connection
from door station to
intercom units.
Target voltage of 15 V DC
to 30 V DC not present
between terminals 1 and 2
at power supply unit 1 7573
and door intercom module
1 4760 when idling or 24 V
C during operation. Wires are the wrong way
round. Modify wiring.
Loudspeaker defective. Replace door intercom
module.
LED at the Verrano glass
door station illuminates. Connections at terminals 1
and 2 swapped. Change the connections.
Poor speech quality or
speech breaking up.
Acoustic test of door
station. Incorrect volume setting. Increase volume at door
intercom module or built-in
loudspeaker or make
microphone quieter.
Acoustic test of intercom
unit. Incorrect volume setting. Decrease volume at door
intercom module or built-in
loudspeaker or make
microphone louder.
Fault Measuring point/test Cause Remedy