Replacement Keys; Troubleshooting - scope F-LINK MK4 Installation Manual

6.5 Replacement keys

The reset/test key is an industry-standard 'Burgess TOK 1' type. Replacement keys are widely available from 3rd-
party suppliers, or as a complete replacement switch and two keys from Scope (part code K23FBA-123).
Symptom
Display shows
fault and/or
alarms not getting
through.
Zone "stuck" on / not
resetting.
fault.
SCOPE TECHNICAL SUPPORT
Ref: FLNK4red
F-Link Mk4 Supervised Transceiver System

7. Troubleshooting

Possible Cause(s)
Interference caused by other
equipment using the same
frequency.
External interference.
Inadequate current available
from power supply.
Site attenuation (signal being
blocked by walls etc.)
Zone input still active.
Zone is designed to latch (output
mode set to Latched).
Intermittent transmission
problem.
There is a fault on the
interconnect wiring or the
equipment being monitored by
the FP-Link input (e.g. a local
PSU).
01803 860700
call:
support@scope-uk.com
email:
Remedial Action
Conduct a radio survey to establish the source of
the interference, then either remove/modify the
interfering equipment or change the F-Link system
to use a clear frequency channel (see 2.1 on page
5).
As above.
Ensure the power supply can provide at least
500mA (½ Amp) at 10v-30v DC, and/or fit a
separate PSU.
(If the F-Link cannot draw enough current quickly
enough when it needs to transmit then this can
stop signals getting through).
Conduct a radio survey to establish achievable
coverage and the optimum aerial type and location.
Depending on the survey results, relocate/upgrade
aerials as required (see 3.1.1 on page 9).
Restore the zone input (short for normally-closed
zones and open for normally-open zones).
Reset the F-Link using the keyswitch.
See under "LINK FAIL" above.
Rectify the fault on the other equipment/wiring. If
nothing is connected to the FP-Link input, check the
680 end-of-line resistor is securely fitted to the
FP-Link terminals in the relevant F-Link unit.
(normally available 0830–1730 Mon–Fri)
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