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12� Troubleshooting
Malfunction
Cause
Remedy
Light does not switch ON
n
No supply voltage
n
Lux setting too low
n
No movement detection
n
Check supply voltage
n
Slowly increase lux
setting until light
switches ON
n
Ensure unobstructed
sensor vision
n
Check detection zone
Lights do not switch OFF
n
Lux setting too high
n
Stay-ON time running
out
n
Interfering heat sources:
e.g. fan heater, open
doors and windows,
pets, light bulb/halo-
gen floodlight, moving
objects
n
Reduce lux setting
n
Wait until stay-ON time
elapses; reduce stay-
ON time if necessary
n
Check detection zone
Sensor switches OFF
despite persons being
present
n
Stay-ON time too short
n
Light-level threshold
too low
n
Increase stay-ON time
n
Change twilight setting
Sensor does not switch
OFF quickly enough
n
Stay-ON time too long
n
Reduce stay-ON time
Sensor does not switch
ON quickly enough when
approached from the front
n
Reach is reduced when
approached from the
front
n
Install additional
sensors
n
Reduce distance be-
tween two sensors
Sensor does not switch
ON when persons are
present despite it being
dark
n
Lux setting too low
n
Semi-automatic mode
activated
n
4 hours OFF activated
n
Increase light-level
threshold
n
Activate fully automatic
mode or switch light
ON at button
n
Deactivate 4 hours OFF
