Cobra Electronics 7928 - Manual (Page 6)

Pt. No. 908 001A
Rev. 06/01
Checking the Alarm
System
Trouble Shooting
Your Cobra 7928/26/HF Alarm System
should have been installed by a fully
trained technician. In the unlikely event of
a problem occurring with it please contact
your supplying/installing Cobra Dealer for
assistance. If this is not immediately
possible the following notes may be of
help:-
Symptom: Radio Key will not ‘arm' or
‘disarm' system.
l The Radio Key battery may be flat (see
notes on Low Battery Indication and
Changing Battery).
Symptom: The radio key may require
re-synchronisation.
l See Testing the Remote Key and Re-
synchronisation section.
Symptom: Alarm has triggered for no
apparent reason.
l When you ‘disarm' the alarm the
diagnostics code will be displayed by
the LED warning light. If direct contact
triggering is indicated then switches in
doors, boot or bonnet may need
adjusting - please consult your Dealer.
If showing Ultrasonic triggering please
check that all windows, sunroof and air
vents are closed and ensure that there
are no loose moving objects (or
animals) left in the vehicle. If the
problem persists contact your Cobra
Dealer for assistance.
You should check your Cobra 7928/26/HF
Alarm System on a regular basis - once a
week is recommended.
1. Direct Contact Check: Arm the system
and exclude the ultrasonic sensors -
wait 45 seconds.
l Opening any of the vehicle doors, boot
or bonnet will trigger the system and
the siren will sound. Disarm the system
from the radio key and repeat the
process for each door, boot and
bonnet.
2. Ultrasonic Sensor (7928) /
Hyperfrequency Radar Sensor
(7928HF) Check:
Whilst remaining seated in the car with
doors and windows closed - Arm the
system and wait 45 seconds.
l Rapid movement of your arms should
trigger the system. Disarm in the
normal way.
If at any time your alarm does not appear
to be operating correctly please refer to the
‘Trouble Shooting' section or, if in any
doubt, contact your supplying/installing
Cobra Dealer.