Ei Electronics RadioLINK Relay Module Ei428 - Manual (Page 4)

3. Troubleshooting RF Link
If, when checking the radio link interconnection, some of the
Ei428 RadioLINK Relays do not respond to the button test,
then:
(i) Ensure you have held the smoke/heat alarm test button
down until the light has come on twice, for 3.5 seconds each
time (this could take up to 20 seconds).
(ii) Convert one of the RadioLink units (an Ei168 or Ei405) that
is centrally located within the house in to a “Repeater” (see
relevant user instructions).
(iii) Re-locate/rotate the units. There are a number of reasons
why the radio link signals may not reach all the RadioLink
Relays in your system (see section on “Limitations of Radio
Frequency Signals”). Try rotating the unit or re-locating the
units (e.g. move them away from metal surfaces or wiring) as
this can significantly improve signal reception.
Rotating and/or relocating the units may move them out of the
range of existing units even though they may have already
been house coded correctly in the system. It is important
therefore to check that all detectors/relays are communicating
in their final installed positions. If units are rotated and/or
resited, we recommend that all units are returned to the fac-
tory settings (press and hold the house code switch on for
about 6 seconds until the relevant light comes on and then
flashes slowly). Then house code all units again in their final
positions as indicated above. The radio link interconnection
should then be re-checked again.
4. Limitations of Radio Communications
Ei Electronics radio communication systems are very reliable
and are tested to high standards. However, due to their low
transmitting power and limited range (required by regulatory
bodies) there are some limitations to be considered.
(i) Radio equipment, such as the Ei428 RadioLink Relay,
should be tested regularly at least weekly. This is to deter-
mine whether there are sources of interference preventing
communication. The radio paths may be disrupted by moving
furniture or renovations, and so regular testing protects
against these and other faults.
(ii) Receivers may be blocked by radio signals occurring on or
near their operating frequencies, regardless of the house
coding.
The Ei428 Relay has been tested to EN 300 220-1 V1.3.1
(2000-09) in accordance with the requirements of En 300
220V1.1.1 (2000-09). These tests are designed to provide
reasonable protection against harmful interference in residen-
tial installations. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used
in accordance with the instructions, may cause harmful inter-
ference to radio and television reception.
However, there is no guarantee that interference will not occur
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