57
• The new alarm is added to the Auto-Scroll list.
20.7 Fire Silence/Reset User Codes
The Silence Fire access code toggle option is designed to limit
the number of users who can Silence/Reset the Fire system. When
programming access codes in the [*][5] user programming sec
-
tion, program this option as ‘Y’ for those users who will have the
authority to Silence/Reset the Fire system. Select ‘N’ for all oth
-
ers. For more information regarding programming access codes,
please see the PC4020 Instruction Manual.
20.8 Auto-Scroll LCD Keypad Display
When a Fire Alarm is initiated, the Alarm and selected trouble
conditions will be displayed on the system LCD keypad(s). If
there is more than one alarm or trouble present simultaneously,
the keypad will continuously scroll through each event. Items on
the scroll list are displayed at two-second intervals. The keypad
will beep as each message is displayed.
Although critical troubles are displayed, Auto-Scroll is only initi-
ated upon a Fire Alarm. If a Fire Trouble is detected and a Fire
Alarm is not present, the trouble will be indicated as any other
system trouble; the keypad trouble light will turn on and the key
-
pad buzzer will beep.
The following events are included in the Auto-Scroll.
•“First Fire Alarm [Zone Label]”: This message will indi-
cate which Fire Alarm was first detected by the control panel.
Each time this message is displayed the keypad buzzer will
beep twice to distinguish it as the first fire alarm.
•“Fire Alarm [Zone Label]”: This message will appear for all
subsequent Fire Alarms and the keypad buzzer will beep once
as the message is displayed. Messages are displayed sequen
-
tially by zone number.
•“Supervisory [Zone Label]”: This message will appear for
Fire Supervisory Off-Normal conditions only and the keypad
buzzer will beep once as it is displayed. Messages are dis
-
played sequentially by zone number.
•“Fire Bell Has Been Silenced”: This message will appear in
the Auto-Scroll list after the alarm notification appliances
have been automatically silenced.
•“Bell Zone Trouble”: This message will appear if a short or
open fault is detected on the PC4020 bell zone or any PC4702
output.
•“Failure to Communicate”: This message will appear when
the panel cannot report to the Central Station.
Auto-Scroll will stop when a valid user code is entered to silence
the alarm notification appliances.
20.9 Fire Trouble Conditions
In all cases, when the panel detects a trouble condition, the key-
pad Trouble light turns on and the keypad buzzer will sound two
short beeps every 10 seconds. Entering and access code will
silence the audible trouble signal. The trouble buzzer will resound
if another trouble is generated or the trouble is not cleared within
24 hours.
If a PC4701 is connected to the system, and the Common Fire
Trouble output is connected, the output will activate when any of
the following events occur. The output will deactivate when all
trouble conditions are restored.
Fire Supervisory Alarm
An Off-Normal condition on a Fire Supervisory zone will cause
the PC4701 Common Fire Trouble output to activate.
See “Fire
Supervisory Zone” on page 52.
Fire Zone Trouble
A fire zone trouble will be generated when an open circuit is
detected on any Fire zone.
Fire zone troubles are grouped for remote annunciation as “Fire
Zone Trouble.” This indication can be programmed on the
PC4612 Fire Zone Annunciator or on the PC4632/4664 Point/
Graphic annunciators (output option #48).
Bell Trouble
A Bell trouble is generated when an open or short is detected on
any PC4702BP alarm notification output. A bell trouble is also
generated when an open condition is detected on the PC4020 bell
output.
Bell troubles are grouped for common indication on a remote
annunciator as a “Bell Zone Trouble.” This indication can be pro
-
grammed on the PC4612 Fire Zone Annunciator or on the
PC4632/4664 Point/Graphic annunciators (output option #56).
AC Trouble
An AC Fail trouble is generated if the AC fails on the PC4020CF
main panel or on the PC4204/PC4204CX, PC4702 or PC4820
modules. AC troubles are grouped for common indication on a
remote annunciator as an “AC Trouble.” This indication can be
programmed on the PC4612 Fire Zone Annunciator or on the
PC4632/4664 Point/Graphic annunciators (output option #56).
This trouble should use a green indicator which is normally ON
and turns OFF for any AC failure.
See also Section 4.10 “AC Delays.”
Battery Trouble
A Battery trouble is generated if any of the following panel batter-
ies are open or shorted: PC4020, PC4204/PC4204CX, PC4702
and PC4820. This trouble condition only turns on the keypad
Trouble light and sounds the keypad buzzer.
Ground Fault
Ground fault detection must be enabled for Commercial Fire
installations by connecting the EGND terminal on the PC4020CF
to a solid earth ground. Upon detection of a resistance of <40k
between any extended conductor and earth ground, a Ground
Fault Trouble will be generated.
Ground fault can be indicated on a PC4632/4664 Point/Graphic
Annunciator (output option #54). All PGM outputs programmed
as Ground Fault will turn ON.
TLM Troubles
If the PC4701 detects a TLM trouble on telephone line 1 or 2, the
PC4701 Common Fire Trouble output will activate. The panel can
only monitor telephone lines if a PC4701 is connected.
NOTE: TLM trouble monitoring cannot be disabled.
Fail To Communicate (FTC)
If the control panel is unable to report to the central station, an
FTC trouble will be generated and the message “Failure to Com
-
municate” will be added to the Auto-Scroll list to advise the user
that the central station may not have received the communication
about the current alarm status.
An FTC trouble can be indicated at a remote PC4632/4664
annunciator (output option #15).
Common Fire Troubles
The following troubles are grouped and can be mapped to a single
output on the PC4612 or PC4632/4664 annunciators (output
option #15).
• Any system AC Trouble (PC4020, PC4702, PC4204/
PC4204CX, PC4820)
• Any system Battery Trouble (PC4020, PC4702, PC4204/
PC4204CX, PC4820)
• Any System Communicator Trouble (TLM1, TLM2, FTC,
LINKS)
• Ground Fault
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