2N Home intercom 2N Helios - Manual - display installation - Manual (Page 4)

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4. Connect door phone to a telephone line and then after approx. 60 seconds make incoming
call to it. In the event that call is successful enter a service mode and change parameter 923
to 1. With this change you will allow dial up numbers from the display.
5. In the event that you can not make a call to a door phone due to a busy line, set jumpers on
display PCB to position as described in the picture below on right. To the PCB of door phone
connect a 12V, 2A power supply (order no. 91341481) and repeat point 4.
Display circuits (except backlight) are
powered from a telephone line. In the
event this is possible, use this kind of
setting. (Recommended). All circuits are powered from additional power
supply. Use these settings only if there are
difficulties with telephone line (line with door
phone is continually busy). With this kind of
setting, there is a possibility of hum from
power supply adapter into the phone line.
6. Remove all three nametags from the front plastic panel. From the space underneath the
name tags remove white milky foil and insert the black mask supplied with the display. Then
cover the space by provided black smoky window.
7. Finish the installation by assembling door communicator panels back together.
Display power supply settings