31
EN
Some errors can be indicated by the device itself:
Indication in error
mode
Tone
Cause
Both LEDs are flashing
The a and P conductors are switched or short-cir-
cuited.
The a or M conductor is not connected or not sup-
plied with power.
A key is stuck (pressed for longer than 15 s).
A list of other possible problems with their causes and solutions is given below.
Problem
Cause
Remedy
You hear a nega-
tive tone when
pressing
.
Programming error.
Erase the programming and pro-
gramme again.
System is still in programming mode.
Exit programming mode.
You press
,
but nothing hap-
pens.
Video internal unit is not connected cor-
rectly.
Check the wiring.
Two functions assigned to the button.
If a call is in progress, the relay swit-
ches to open the door.
If no call is in progress, the light relay
switches.
The image on
the video internal
unit is not clear.
Conductors V1 and V2 have been
reversed.
Reverse conductors V1 and V2.
Cable is unsuitable:
• cable distance is too great;
• cable is eroded;
• cable cross-section too small;
• cable is not a twisted pair cable.
Replace the current cable with a
suitable cable.
The gain on the splitters is not set cor-
rectly.
Adjust the gain on the splitters with
the potentiometers.
No image on the
video internal
unit. The other
functions work
OK.
Wiring is not connected correctly:
• M or P missing;
• V1 or V2 not connected.
Check the wiring (see wiring dia-
gram).
Jumpers not configured correctly.
Set the jumpers correctly on the con-
tacts (see chapter Installation)
10-571 Installation manual internal video unit