Models FL3100/3101
24
Problem
Possible Cause
Corrective Action
No output signal and green
LED in UV window is off.
No DC Power to the Unit
Be sure the +24 VDC is
applied with the correct
polarity.
No output signal and green
LED in UV window is rapidly
blinking.
Low voltage FAULT (voltage
at unit less than +18VDC).
Be sure that the unit is
powered with at least
+20VDC under load.
2mA signal and green LED in
UV window is slowly blinking.
COPM FAULT, dirty or
obscured optical path (UV or
IR window)
Clean UV and IR window and
associated source light rods.
Constant 8mA signal with no
known radiation to detector
(FL3100 only).
Background IR radiation at
detector.
Cover IR portion of FL3100
for ten seconds to determine
if there is background IR. If
there is, remove IR Radiation
source or change FL3100
location. If there is no
background IR, replace IR
detector in FL3100.
Constant 12mA signal with no
known radiation to detector
(FL3100 only).
Background UV radiation at
detector.
Cover UV portion of FL3100
for ten seconds to determine
if there is background UV. If
there is, remove UV radiation
source or change FL3100
location. If there is no
background UV, replace UV
detector tube in FL3100.
Constant 16mA or 20mA
signal (WARN or ALARM)
with no known radiation at
detector (FL3101 only).
Background UV radiation at
detector.
Cover UV portion of FL3101
for ten seconds to determine
if there is background UV. If
there is, remove UV radiation
source or change FL3101
location. If there is no
background UV, replace UV
detector tube in FL3101.