DS1067-062C 40 LBT20063
3 FAILURE TO ARM THE SYSTEM
This chapter contains a detailed description of reasons which could prevent the alarm system from being armed and
provide the solutions to be adopted.
3.1 SYSTEM ARMING BLOCK
An EN50131 compliant burglar alarm system cannot be armed if certain conditions are present. More specifically, the
system cannot automatically "ignore" the blocking conditions and be armed all the same. The blocking conditions, with
some restrictions, may be overridden and consequently bypassed by means of specific manual commands imparted by
the user or by the installer.
The purpose is to prevent false alarms or false feelings of security because the system would not always be able to
indicate break-in attempts in these conditions.
The conditions which prevent system arming are:
• One or more open burglar inputs in the zones to be armed.
• One or more jammed motion detectors in the zones to be armed (not applicable for 1067/024).
• Tampering of one or more open inputs or devices in the zones to be armed.
• Interconnection (e.g. line) faults.
• Primary power failure (no electricity from the mains).
• Secondary power failure (batteries not working perfectly).
• Alarm transmission device failure (ATS4 or PSTN telephone interface).
• Alarm signalling device failure (sirens)
• Failure of all alarm transmission and signalling devices.
• Battery charger fault.
The electronic and proximity keys, the timed programmer and the special key input will not arm the alarm system in these
cases. The failure to arm event caused by the block is stored in the Events Log with a description of the reason.
You can attempt to override the block and arm the system all the same by operating on the alarm system using the
keypad.
The cause or causes which prevent arming will appear on the keypad display. You can try to eliminate the causes of the
block, for example by closing the open inputs, or force the block with the keypad by checking each block, overriding them
one by one with subsequent confirmations, force the block .
The block override operation is stored step by step in the Events Log.
IMPORTANT! It is not always possible to override the arming block. The possibility of overriding depends on the
access code used, as shown in Table 9 – Alarm system arming block override.
Some causes and conditions prevent overriding and cannot be bypassed even using the Installer code. In these
cases, remove the causes which prevent arming the system before arming it.
Furthermore, you cannot override the arming block in one step. You must override the single blocks one by one.
IMPORTANT! The arming block will be overridden until the system is disarmed. The override will be end when the
system is disarmed and must be repeated when the system is armed again. The event is stored in the Events Log
and the end of the override.
IMPORTANT! Overriding the arming block is a temporary solution to allow to arm the alarm system also when
conditions which may compromise efficacy are present. It is advisable to remove the causes of the arming block and
to restore perfect efficacy of the system as soon as possible.
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