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UNIPOINT OPERATING MANUAL
8.2 Normal Operation LCD Event Codes
The display event codes are shown below:
NORMAL OPERATION DISPLAY TEXT CODES
CODE
A
-
1
A
-
2
A
-
3
O
F
F
F
X
X
I
n
h
8.3 Display, Sounder and Relay Operation
The table below shows the default operation of the display, sounder and relays for given
events.
EVENT
Alarm 1 threshold exceeded
Alarm 2 threshold exceeded
Alarm 3 threshold exceeded
Fault
Inhibit
Overange
*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:
Gas reading still exceeds alarm threshold
Latched alarm
Sounder stops. Flashing alarm LED changes
to steady. Gas reading and alarm code
displayed on LCD. Alarm relay remains in
Unlatched alarm
Sounder stops. Flashing alarm LED changes
to steady. Gas reading and alarm code
displayed on LCD. Alarm relay remains in
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.
EVENT TYPE
Alarm point 1 exceeded
Alarm point 2 exceeded
Alarm point 3 exceeded
All outputs disabled
Fault. XX=Fault code
Remote or field* inhibit
LCD
LEDS*
ALARM
FAULT/INH
A-1
flashing
A-2
flashing
A-3
flashing
FXX
off
Inh
off
Or/A3
flashing
alarm state.
alarm state.
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2306M5001 MAN0638 ISSUE 7 01/2011
SOUNDER
off
on
off
on
off
on
flashing
on
flashing
off
off
on
Gas reading below alarm threshold
Sounder stops. Alarm LED is turned off. The
LCD alarm code clears. Alarm relay returns to
original state.
Alarm indications and relay operation reset
automatically without need for reset/accept.
RELAY
A1
A2
A3
F
X
X
X
X
X
X
X
X
X
X
X
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