UNIPOINT OPERATING MANUAL
2306M5001 MAN0638 ISSUE 7 01/2011
14
8.2 Normal Operation LCD Event Codes
The display event codes are shown below:
8.3 Display, Sounder and Relay Operation
The table below shows the default operation of the display, sounder and relays for given
events.
*LED flash frequency: Alarm = 2Hz, Fault = 1Hz and Inhibit = 0.5Hz
8.4 Accept/Resetting Alarms
In normal operation, the X button on the controller front panel or a switch connected to the
remote reset terminal is used to reset/accept alarm events. The effect of reset/accept
dependent on gas reading and alarm latching setting is described below:
Note: If the controller is in inhibit when an alarm threshold is exceeded the alarm LED only will
operate. See section 10 for details of how the relay delay and hold function effects the
operation of the unit.
NORMAL OPERATION DISPLAY TEXT CODES
CODE
EVENT TYPE
A
-
1
Alarm point 1 exceeded
A
-
2
Alarm point 2 exceeded
A
-
3
Alarm point 3 exceeded
O
F
F
All outputs disabled
F
X
X
Fault. XX=Fault code
I
n
h
Remote or field* inhibit
EVENT
LCD
LEDS*
SOUNDER
RELAY
ALARM
FAULT/INH
A1
A2
A3
F
Alarm 1 threshold exceeded
A-1
flashing
off
on
X
Alarm 2 threshold exceeded
A-2
flashing
off
on
X
X
Alarm 3 threshold exceeded
A-3
flashing
off
on
X
X
X
Fault
FXX
off
flashing
on
X
Inhibit
Inh
off
flashing
off
X
Overange
Or/A3
flashing
off
on
X
X
X
Gas reading still exceeds alarm threshold
Gas reading below alarm threshold
Latched alarm
Sounder stops. Flashing alarm LED changes
to steady. Gas reading and alarm code
displayed on LCD. Alarm relay remains in
alarm state.
Sounder stops. Alarm LED is turned off. The
LCD alarm code clears. Alarm relay returns to
original state.
Unlatched alarm
Sounder stops. Flashing alarm LED changes
to steady. Gas reading and alarm code
displayed on LCD. Alarm relay remains in
alarm state.
Alarm indications and relay operation reset
automatically without need for reset/accept.
