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11. Troubleshooting
Malfunction
No power at the sensor
Light level not being
communicated
Sensor sending motion
detection signal when it
should not
Sensor reach change
Cause
■ Fuse has tripped, not
switched ON, break in
DALI wiring
■ Short circuit
■ Break in wiring
■ DALI power supply
faulty
■ There is interference,
e.g. fan, airconditioning
system or other source
of heat, in the detection
zone
■ Animals moving in
detection zone
■ Wind is moving
paper or plants in the
detection zone
■ Sunlight is shining on
the lens
■ Sudden temperature
change due to air
expelled from fans,
open windows, air-
conditioning systems
or other sources of
heat
■ Sensor near Wi-Fi
or other wireless
communication source
■ Differing ambient
temperatures
- 21 -
Remedy
■ Activate, change fuse,
turn ON mains switch,
check DALI wiring with
voltage tester
■ Check connections
■ Check cable
■ Adjust detection zone
or fit shrouds, increase
distance
■ Adjust zone or fit
shrouds
■ Change detection zone
■ Mount sensor in a
protected place or
change zone
■ Adjust detection zone
or install in a different
place
■ Install at least 2 m
away from the wireless
communication source
■ Use shrouds to
define detection zone
precisely
GB
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