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a)
Disconnect the power to the unit and disable/inhibit any extinguishing equipment that is connected
to the unit.
b)
Use water and detergent to clean the detector windows and underside of the reflector. Rinse with a
soft cloth, cotton swab, or tissue.
c)
Where dust, dirt or moisture accumulates on the window, first clean the window with a soft optical
cloth and detergent, and then rinse with a clean soft cloth, cotton swab, or tissue. If contamination
continues to be an issue consider using the air shield.
6 Troubleshooting
Use the table below to help troubleshoot any detector operational issues.
Detector Status
LEDs Off
Fault Relay is open
Current output at 0mA
Yellow LED constantly on
Fault Relay is open
Current output at 0mA
Yellow LED constantly on
Fault Relay is open
0–20mA at 2mA
Green LED constantly on
Fault Relay is closed
0–20mA at 3mA
Red LED constantly on
Alarm Relay closed and
current output is at 20mA
For more information & technical support:
F-Guard IR3-H2 User Manual
Possible Cause
No power to the unit
Power problems
BIT Fault
Dirty Window Warning
Detector is in alarm latch
mode
Detector is exposed to a
flame
info@gastech.com
76-M-6010-02-02
Corrective Action
Check that the power (18-vDC – 32vDC is
•
available to the detector.
Check power polarity.
•
Check wiring in the detector.
•
Check the voltage between the "24VDC (+)"
and "24VDC (-)" terminals to verify that it is in
the allowed range (see section 9.2)
Clean detector window and underside of
reflector.
Power cycle the detector (turn the power off and
then back on) or initiate a manual BIT test.
Clean detector window.
Restart the detector (by turning the power off
and then back on).
Power cycle the detector (turn the power off and
then back on) or initiate a manual BIT.
Check cause of alarm.
•
If caused by "friendly fire", re-position the
•
detector so that it is not affected by it.
27
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