MAN1544-5
37
LCS Operation & Controls
Lifting the cover and pressing the MCP starts the manual agent release sequence. This two action safety
feature prevents any accidental operation of the control and should not be disabled.
6.3
Common Agent Release Card & LCS Indicators
There are 12 indicators on both the Agent Release Module and Local Control Station. They are;
MANUAL
ACTIVATION
(Red)
Illuminated when a manual release sequence has commenced. A Manual release
sequence can only be started by activating the manual release at the FACP or LCS.
The indicator is extinguished by activating RESET on the FACP.
MANUAL
ACTIVATION
(
Red)
Illuminated when a manual release sequence has commenced. This occurs when
the selected zone(s) on the FACP have gone into alarm. For dual zones, the indicator should flash when the
first zone goes into alarm, and steady when the second zone goes into alarm.
Indicator is extinguished by activating RESET on the FACP.
AGENT
DISCHARGED
(Blue)
Illuminated when the pressure switch indicates the agent has been released. For
Pyrogen, feedback is from the thermal switch. If there is no pressure switch fitted, the indicator shall be
illuminated immediately the agent release signal is activated (Selected via FACP on-site programming
–
refer to relevant FACP Manual)
The indicator is extinguished by activating RESET on the FACP.
LOCK OFF
VALVE INHIBITED
(Yellow)
Illuminated when the lock-off valve has been activated.
STAGE 2
TIMER RUNNING
(Yellow)
Illuminated when the pre-discharge delay timer is running.
The indicator is extinguished by activating the RESET control on the FACP.
AGENT CIRCUIT
FAULT
(Yellow)
Illuminated when there is a fault on the monitored Main or Reserve
activation circuits e.g. S/C or O/C.
AGENT LOW
PRESSURE
(Yellow)
Illuminated when the low pressure switch is activated. This indicates a
leakage at the agent cylinder. The low pressure switch is a separate switch.
TRIGGER ZONE
ISOLATED
(Yellow)
Illuminated when any of the programmed trigger zones on the FACP are
isolated.
COMMON FAULT
(Yellow)
Illuminated under the following fault conditions;
pressure switch monitoring fault,
low pressure switch monitoring fault,
lock-off valve monitoring fault,
activation circuit fault,
stage 1 output fault,
stage 2 output fault,
