30
30
o
A
B
C
R10 m
R0.5 m
R7 m
R4.5 m
a
A
B
C
b c
Slot path
Fig. 19
Fig. 20
Fig. 21
Fig. 22
Fig. 23
The selected part to
be eliminated
Take example: cut a lens shield with plier.
Take example: cut the lens shield with plier.
Detection pattern
Detection pattern
Usage of lens shield
TROUBLESHOOTING
When 99 190 31 works abnormally, check assumptive problems and suggested solutions in follow-
ing table that will hopefully to solve your problem.
Problem
Possible cause
Suggested Solution
Lighting device
does not turn.
1. Power does not turn on.
2. Wired incorrectly.
3. Lux knob adjusted incorrectly.
4. Malfunctioned load.
1. Switch on the power.
2. Refer to wiring diagrams for correct
connection.
3. Check if Lux knob is set to the correct
position.
4. Replace the disabled load with a new one.
Lighting device
does not turn
off
1. Auto off time is set too long.
2. Detector is nuisance triggered.
3. Wired incorrectly.
1. Set auto off time to a shorter time and check
if the load is switched off or not according to
the preset off time.
2. Keep away from detection coverage to avoid
activating detector while doing the test.
3. Refer to wiring diagrams for correct
connection.
LED does not
turn on
1. Exceeding the detection range.
2. Time knob is not located to
TEST position.
3. No power supplied.
4. Wired incorrectly.
1. Walk in the effective detection range
2. Time knob must be located to TEST position.
3. Switch on the power.
4. Refer to wiring diagrams. for correct
connection.
Nuisance
triggered
There are heat sources, highly
reflective objects or any objects
which may be swayed in the wind
within the detection coverage.
Avoid aiming the detector towards any heat
sources, such as air conditioning, electric fans,
heaters or any highly reflective surfaces. Make sure
there are no swaying objects within the detection
coverage.
