Troubleshooting - Abus Terxon MX Installation Instructions Manual

18 Troubleshooting

The alarm centre shows no reaction
although mains and battery power are
present.
The display shows one or more open
zones (although all alarm contacts
seem to be at rest) and the alarm
centre cannot be activated or there is
no permanent error tone.
The alarm centre reports continuous
tampering.
The triggering of a sensor does not
result in an alarm.
External alarm does not start.
Tamper alarm is not triggered
although a tamper contact was
opened on an alarm sensor.
Sensors trigger a false alarm.
Program and user code forgotten.
You think the alarm centre has a
malfunction.
Check mains and battery connections and the three fuses. Replace fuses with
fuses of similar rating if necessary.
Remove all connections of the alarm zone concerned and replace them by a wire
jumper between CCT. If the zone is displayed as closed, the cause of the problem
is in the connected alarm contacts/cables. Check them using a circuit tester.
There may be a short-circuit between the alarm and tamper zone or the 0V
contact.
Check the tamper contacts of the alarm centre and the control units. The springs
of these contacts must be pressed in fully. Check the connected tamper contacts
with a circuit tester and make sure there is no short-circuit. Make sure that the
tamper zone of the siren is also terminated with 0V.
If you have connected more than one sensor in an alarm line, check that all NC
contacts are connected serially and not in parallel, then activate all connected
sensors simultaneously. Make sure that you have removed the wire jumper of the
zones that was fitted in the factory. Has the alarm zone been correctly
programmed?
Use a multimeter to check the transistor output to which n the siren is connected
to ensure correct functioning of the alarm centre. Then connect the siren directly
to the battery and check its function.
Check that all tamper contacts are connected in series. If they are connected in
parallel, all contacts must first be opened to trigger a tamper alarm. There may be
a short-circuit in the wiring.
Check that the sensors have been installed and adjusted according to the
manufacturer's instructions. In the case of motion sensors, check that they have
been mounted to face into the room and not towards any heat source. In the case
of door/window opening contacts, check that the switching distance between the
reed contact and the magnet does not have too much movement. Check the
wiring. Check that solder joints and clamps are sound. If cables are laid too near
to high-voltage lines, errors can also occur.
Disconnect mains and auxiliary power supply from the alarm centre. Short-circuit
the "NVM RST" jumper under the connector block of the additional transistor
outputs and then, with the jumper still short-circuited, reconnect the auxiliary
power supply and then the mains supply. All code and chip keys deleted. The
user code 1 (master code) is reset to 1234, and the installer code 7890. The
programming, except for date/time, remains intact.
Restore the factory settings (program menu option 98) and check the function
again. The fault is usually in the external cabling.
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UK