interference with the sampling point, it may be necessary to
increase this time delay. Delay values of up to 240 seconds before
signalling a fault are available when setting up the FAAST LT
detector. This is to allow time for the air pressures to stabilise after
the temporary event.
When a ow fault occurs, the ow fault LED blinks during the
programmable ow fault delay (default: 60s). At the end of the
delay, the LED switches ON and the general fault is triggered. If
the general fault also has a delay programmed, this will be added
to the ow fault delay before the general fault LED becomes xed
ON and the fault relay is set.
Events log
The detector records operations and trouble states in a log with
time and date stamps. The event log is a useful tool to help with for
troubleshooting an installation. The user can download data logs
via a USB port when connected to a PC running Pipe IQ.
The maximum number of events in the log is 2244. When the
recording area is full, the FAAST LT unit continues to store
abnormal events by over-writing the oldest records.
For each recorded event, the log contains the following information:
event descriptor, date and time, the airow temperature, the airow
rate, the power supply voltages and the state of the laser sensors.
Events include the detector state (Initialising, normal, service
mode etc.), alarms, faults, alerts and relay activation/deactivation.
Trend logging (recording the device status at regular intervals) is
disabled in the FAAST LT as a factory default. Enabling the trend
log will ll the event log quicker. For example, setting the trend
interval to 10 minutes will ll the complete log in just over 2 weeks.
RELAY OUTPUTS
Single pole changeover volt free unsupervised contacts are
provided for Fault, Auxiliary Fault, Alarm and Pre-Alarm (on stand-
alone version only). On two-channel devices, there are two sets of
alarm and pre-alarm relays. In Table 4 below, SA relates to Stand-
Alone and LB relates to a Loop Based FAAST LT device.
WARNING: Because the relays use magnetic latching, the contact
output status should be checked prior to use powering any circuit,
in case it has changed due to mechanical shock during shipment
or installation handling.
Resetting a detector from alarm or fault
When an alarm or fault is latched, the FAAST LT detector should
be reset from this condition using one of the following methods.
(Note: By default Alarms are latched, Faults are not.)
Table 4: Relays
Type Relay Whenset Notes
Alarm Default=Latched Sensorreachesalarmlevel Defaultdelayis0
Pre‐Alarm Notlatched Sensorreachesalarmlevel Defaultdelayis0
Sounder Notlatched AlarmorPre‐Alarm
Alar m(sensormode) Default=Latched PanelsetssensorremLEDON Defaultmode;defaultdelayis0
Alar m(modulemode) Default=Latched PanelsetsmoduleoutputON
Sounder Notlatched Alarm
Fault Default=Notlatched Oneormorefaults FactorydefaultasCH1faults
Auxiliary Default=Notlatched ConfigurablewithPipeIQ FactorydefaultasCH2faults
Both
Latching
SA
LB
● Press the front panel Reset button when in Maintenance mode;
(requires pass-code access). Return to normal operation by
pressing R+T+D simultaneously or waiting 5 minutes.
● Use the External Input; set to RESET as factory default.
Connect Input terminals 21 and 22 together for a short period.
● It is possible to perform an alarm reset from a PC using the reset
control available in the PipeIQ software; (requires activating the
USB connection, then go to: Monitoring tab > Actions tab >
Click Reset at bottom right).
● For loop based units only, Advanced Protocol panels may send
a Reset signal over the loop if this feature is enabled (check
with panel manufacturer) and the FAAST LT device is operating
in module alarm mode.
When a RESET is performed, all relays are reset. The device
then enters Normal mode operation; it does not re-initialise. If any
fault or alarm states remain, the device will re-activate that state
automatically.
General reset of a detector
The FAAST LT device will be reset and re-initialised by removing
the external power to the device and reapplying it. In general, this
is not an acceptable method for clearing latched alarms or faults
during normal operation because it will re-initialise the device ow
settings.
PASSWORD RECOVERY
There is a procedure that can be used to recover a lost password
from a FAAST LT device. It should be used when a unit has been
installed and the password has been changed but is subsequently
forgotten or misplaced. The default (factory set) password in a new
device is 3111.
To reset a FAAST LT password it is necessary to run some special
software to obtain a recovery key. For instructions and help with
this recovery procedure, contact System Sensor Europe Technical
Services (sse.technical@systemsensor.com) and provide the
following information:
● Product Model number: (on device label)
● Device Serial Number: (on device label)
● Date code: (4 digit number followed by the letter T, to be found
at the bottom right-hand side of the product label on the back
of the front door)
● Name of Requester and Requester Organisation:
Note: This service is only available to Honeywell or accredited
System Sensor OEM customers.
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