GASGUARD IS CONTROLLER Issue: R2, Date: 26/09/2011, CRN: 7502
Page 22
3.3
Controller LED and Display Operation
There are seven Status LED’s located on the facia of the IS Controller:
Power LED - Red
Alarm LED – Red
Fault LED – Red
Relay Indication LEDs (x 4). These LEDs do not indicate the presence of power to the relay coils. An
illuminated relay LED indicates that a relay has changed state from a non-alarm state into an alarm
state.
On power up, the power LED will activate and the controller will enter its start up procedure. This includes a 10
second long self-test mode that carries out internal tests. Input signal status and alarm states are checked during the
start-up sequence.
Once the start up procedure is completed, the Display will show all current gas levels. Alarm, Fault and Relay LED’s
will reflect the state of the input channel signals/alarm states according to how the Controller has been configured.
There are 3 Alarms and 2 Faults.
Alarm1 (A1), Alarm2 (A2), Alarm3 (A3)
Low Fault (LF)
High Fault (HF)
3.3.1
In the event of an Alarm in non-latched mode:
The alarm LED activates.
The current gas level and alarm type (ALM1, ALM2 or ALM3) toggle on the display.
The relevant relay and LED activates and remains ON.
If the gas level is no longer in an alarm region, the Alarm and relay LEDs turns OFF. The gas level only is
displayed.
3.3.2
In the event of an alarm in latched mode:
The alarm LED activates.
The current gas level and alarm type (ALM1, ALM2 or ALM3) toggle on the display.
The relevant relay and LED activate and remain ON
The current gas level and the latched alarm type (ALM1, ALM2 or ALM3)toggle on the display.
The relevant relay and LED is activated and stays ON.
If the gas level is below a latched alarm level but still above another alarm point, the latched alarm can be reset
by holding the
key down for 5 seconds or activating the remote reset button. The display will now indicate the
next lowest alarm that is active. Other active alarms will not be reset.
OR:
If the gas level has dropped into the region below all alarm setpoints but the latched alarm has not been
reset, the alarm LED and the latched relay LED remain ON.
The current gas level and highest alarm type (ALM1, ALM2 or ALM3) toggle on the display.
The alarm can be reset by holding the
key down for 5 seconds or by activating the remote reset button.
The alarm and relay LEDs turn off and the current gas level is displayed, no alarm flashing.
3.3.3
In the event of a Fault indication:
Once the source of the fault has been identified and celared, proceed in the same way as for an alarm condition.
Summary of Contents for gasguard
Page 47: ...GASGUARD IS CONTROLLER Issue R2 Date 26 09 2011 CRN 7502 Page 46 ...
Page 62: ...GASGUARD IS CONTROLLER Issue R2 Date 26 09 2011 CRN 7502 Page 61 B2 Main Menu Flowchart ...
Page 63: ...GASGUARD IS CONTROLLER Issue R2 Date 26 09 2011 CRN 7502 Page 62 B3 Calibration Flowchart ...
Page 64: ...GASGUARD IS CONTROLLER Issue R2 Date 26 09 2011 CRN 7502 Page 63 B4 Configuration Flowchart ...
Page 74: ...GASGUARD IS CONTROLLER Issue R2 Date 26 09 2011 CRN 7502 Page 73 Appendix C Approvals ...
Page 75: ...GASGUARD IS CONTROLLER Issue R2 Date 26 09 2011 CRN 7502 Page 74 ...
Page 76: ...GASGUARD IS CONTROLLER Issue R2 Date 26 09 2011 CRN 7502 Page 75 ...
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Page 79: ...GASGUARD IS CONTROLLER Issue R2 Date 26 09 2011 CRN 7502 Page 78 ...