997-340-001, Issue 8
April 1998
ID1000 Series Operating Manual
3.3 MUTE INTERNAL SOUNDER
(This function is also possible from VDU or remote switch)
After an alarm or fault has occurred, pressing this pushbutton (or the appropriately-labelled VDU key or
remote switch if available) will switch either the FIRE or FAULT internal sounder from continuous to
intermittent operation: at 12 seconds interval in the case of the FIRE sounder and 2 minutes interval in the
case of FAULT (if both sounders are sounding only the FIRE sounder operates intermittently, the FAULT
sounder being silenced altogether). This mode of operation then continues until the system is RESET.
In addition, if the MUTE INTERNAL SOUNDER pushbutton
on the panel was pressed, further
information is given about the events which have occurred, in ‘horizontal-scrolling’ mode on the text
display. In particular, those FAULTs which are identified at Top-Level display only as a SYSTEM
FAULT with a number, are described in full at this stage. The most recent event is shown first, regardless
of whether it is FIRE, PRE-ALARM or FAULT.
If more than one event is outstanding since the last time that the RESET pushbutton was pressed,
you may step through the events by operation of the up or down arrow keys, ‘down’ to go backwards
in time and ‘up’ to go forwards. The word MORE appears on the text display to indicate further events.
Press the NO/CANCEL pushbutton to revert to the top-level display. If no key is pressed within two
minutes the system reverts to top-level display automatically.
The MUTE pushbutton may be pressed at any time in order to review these events, not only when the
internal sounders are operating.
As a special case, if the fault LOSS OF PART LOOP has occurred and has not been cleared, it is
possible to obtain a detailed report on all the devices recorded as missing. Press ENTER at any time
when the display is scrolling, and the system, if appropriate, displays:
Log each missing device individually?
(Y/N)?
If YES is pressed all the individual devices involved are reported with separate NO REPLY/MISSING
messages (this will cause normal FAULT action to take place). The devices can then be reviewed by
pressing MUTE again and stepping up and down through the events.
Note: If ‘System Fault 40 - Main CPU Watchdog Operated’ is indicated, it will also be necessary to
press the SILENCE SOUNDERS pushbutton in order to mute the fault buzzer.
3.4 EVACUATE
(This function is also possible from the VDU)
Press this pushbutton (or the appropriately-labelled VDU key) to cause all sounders, etc., which are
designated in the pre-programmed EVACUATE pattern, to operate. No further action is required until
it is required to silence the sounders, in which case SILENCE SOUNDERS should be pressed.
Note: The RESET pushbutton will not function after EVACUATE is pressed. SILENCE SOUNDERS
must be pressed first.
3.5 SILENCE (and RE-START) SOUNDERS
(This function is also possible from the VDU or remote switch)
Press the SILENCE SOUNDERS pushbutton (or the appropriately-labelled VDU key or remote switch
if available) to switch off all external Alarm sounders which are operating as a result of a FIRE alarm
or EVACUATE action. The internal FIRE sounder is NOT affected by this operation (except in the
case detailed below), also if any external Control Modules have been programmed so as not to be
silenced by SILENCE SOUNDERS, these too will not be switched off by this operation.
If, after having pressed this pushbutton, you want to start sounders again in the same pattern as they
were previously operating, press the SILENCE SOUNDERS pushbutton once again. You must wait
at least 10 seconds between silencing the sounders, and re-starting the sounders. Note that on re-
starting the sounders, the internal fire sounder will also change back to steady mode of operation and
you may have to press MUTE again.
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