AV-OL-CTRL-T2 - Obstruction Light Controller
Installation & Service Manual
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21
Problem
Possible Cause
Solution
LI Single fixture is not
operational (others
turning red at night or
photocell covered)
•
Wired
incorrectly or
wire(s) lose
•
Light failure
•
Check wiring to light in middle
junction box
•
Measure voltage at junction
box. If correct voltage replace
light.
LI Single fixtures are
not operational (top
light red flashing
at night or when
photocell covered)
•
Wired
incorrectly or
wire(s) lose
•
Light failure
•
No power to the
light
•
Check wiring of lights in Middle
junction box and Control Box.
•
Measure voltage at junction
box. If correct input power,
replace light.
•
If no voltage to the junction
box, check output power from
Control Box.
Single fixture
middle lights are not
operational (top light
red flashing during
the day)
•
Wired
incorrectly or
wire(s) lose
•
Photocell failure
•
PLC failure
•
Check wiring between
Photocell and PLC, check wiring
output of PLC.
•
Cover photocell. Check if output
voltage of PLC changes. If no
change, replace Photocell.
•
If Photocell operational, replace
PLC.
All lights are not
operational
•
No or wrong
input voltage
•
Tripped breaker
or no output
voltage
•
Wired
incorrectly or
lose wire(s)
•
Check input power to Control
Box.
•
Check output voltage to both
top and middle lights in the
Control Box.
•
Check wiring between Control
Box and top and middle
junction boxes.
Light not transitioning
between day-night or
night-day
•
Wired
incorrectly or
wire(s) lose
•
Photocell failure
•
PLC failure
•
Check wiring between
Photocell and PLC, check wiring
output of PLC.
•
Cover photocell. Check if output
voltage of PLC changes. If no
change, replace Photocell.
•
If Photocell operational, replace
PLC.
