HumanTechnik lisa Bedienungsanleitung Seite 11

Possible reasons for the unit not
functioning
- You did not press the doorbell for
long enough. Ring the bell for longer.
- If your doorbell system uses direct
current voltage, you have not
connected the wires with the correct
polarity. Swap over the wires.
- The doorbell voltage of your
system is too low. Either contact an
electrician to have the doorbell
system converted or use the Radio
Doorbell Transmitter - Acoustic.
Call button
Pressing the call button on the Radio
Doorbell Transmitter causes a signal
to be triggered on every receiver
which is set to the same radio chan-
nel as the transmitter. The call but-
ton lamp lights up to indicate this.
This makes it possible to call people
who are in different rooms. Also,
this button can be used for checking
the system is functioning even when
the telephone cable is not connec-
ted.
Mains operation
You can also operate your Radio
Doorbell Transmitter via the plug-in
power supply unit. To connect the
PSU, insert the connector on the end
of the PSU cable into the correspon-
ding socket on the left-hand side of
the device. Then plug the power sup-
ply unit into the normal 230 V socket
in your house.
Radio range
Note the following points when
using the Radio Doorbell Transmit-
ter:
The radio signals are designed to
have a range of 80 meters under
optimum conditions.
The following conditions may result
in a reduced range:
- Signal transmission through buil
ding structures or vegetation
- Interference from TVs, computer
monitors and mobile phones.
Under certain circumstances, this
may prevent the receiver from
functioning at all.
- Positioning of the transmitter at an
unfavourable distance from surfa-
ces which reflect radio waves, for
example floors and walls.
This may lead to the signal wave
being weakened or even cancelled
out by the reflected wave.
- Metallic objects reduce the range
due to the shielding effect of the
metal.
- Particularly in towns and cities,
there may be many other sources
of radio waves which can disrupt
the original signal.
- Having units operating at similar
frequencies located close to one
another may also result in mutual
interference.
English 11