For more information & Technical support:
27
F-Guard UV-IR User Manual
Doc. No. F110V0020.06
5.1
Cleaning Procedure
To clean the detector:
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
Possible Cause
Corrective Action
LEDs Off
Fault Relay is open
Current output at 0mA
No power to the unit
Check that the power is connected to the
detector.
Check power polarity.
Check wiring in the detector.
Yellow LED constantly on
Fault Relay is open
Current output at 0mA – 1mA
Power problems
Check the voltage between the “24VDC
(+)” and “24VDC (-)” terminals to verify
that it is in the allowed range (see section
Yellow LED constantly on
Fault Relay is open
0
–
20mA at 2mA
BIT Fault
Clean detector window.
Restart the detector (by turning the power
off and then back on).
Green LED constantly on
Fault Relay is closed
0
–
20mA at 3mA
Dirty Window Warning Clean detector window.
Restart the detector (by turning the power
off and then back on).
Red LED constantly on
Alarm Relay closed and
current output is at 20mA
Detector is in alarm latch
mode
Restart the detector (by turning the power
off and then back on) or perform a manual
BIT.
Alarm Relay closed and
current output is at 20mA
Detector is exposed to a
flame
Check cause of alarm.
If caused by “friendly fire”, re-position the
detector so that it is not affected by it.