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13� 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, air-condition-
ing 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 ex-
pelled from fans, open
windows, air-condi-
tioning systems or oth-
er sources of heat
■ Sensor near Wi-Fi or
other wireless commu-
nication source
■ Differing ambient
temperatures
- 22 -
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 differ-
ent place
■ Install at least 2 m
away from the
wireless communica-
tion source
■ Use shrouds to
define detection zone
precisely
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