20
9. Mk9 Central Unit, General information
9.1 General Description
The Central Unit has a display that is used to monitor and control a O2 Safety System with up to
four sensors. The central unit is multi-lingual and it displays information text for all alarm and error
conditions. It also displays the O2 values of all connected O2 sensors, indicating which sensor the
value comes from. The central unit has an alarm memory that remembers and reactivates any
alarm after a power interruption.
9.2 LED (Light Emitting Diode), buzzer and display indications
Indication Explanation
Green LED on Unit in operation
Red LED on and constant
sound signal
Alarm. Ambient O2 concentration level is under or over the alarm
settings. The display will show “Gateway Alarm A”, indicating which
sensor the alarm comes from. Connected remote horn/strobes will
be activated.
If the O2 level is under 19.5%, evacuate the area.
Yellow LED on and
intermittent audible tone
System fault. The error will be described in the display until the fault
has been rectified and cleared/reset on the central unit.
System Fault LED
(Yellow)
O2 Alarm LED
(Red)
Power on LED
(Green)
Display
Reset Button
Buzzer
To Next Page
Loading...
