Timeguard NSLB150C User Manual
Page 9
SeCtIoN SIX
tRoUBLeSHootINg gUIde
PRoBLeM
❏
lamp stays On all the time
night and day.
❏
lamp stays On all the time at
night, or piR keeps activating at
random for no apparrent reason.
❏
piR keeps activating for no
reason / at random.
❏
piR sensor will not operate
at all.
❏
The piR sensor will not
operate at night.
❏
Unit activates during the
daytime.
❏
piR coverage is poor/sporadic.
❏
Detection range varies from
day to day.
SoLUtIoN
Check wiring connections. Wires to l and l1 terminals may be
transposed.
The unit may be suffering from false activation. Cover the
sensor lens completely with black pvc tape. This will prevent
the sensor from "seeing" anything. if the unit now switches
off after the set time duration and does not re-activate, this
indicates that the problem was caused by false activation. The
problem may be solved by slightly adjusting the direction/
angle of the sensor head (see previous section). if however,
the unit continues to remain On or to operate randomly the
unit is faulty and should be replaced.
You may not be allowing the unit time to complete it's
warm-up period. Stand well out of the detection range and
wait (the warm-up period should never exceed 5 minutes).
Occasionally, winds may activate the sensor. Sometimes
passages between buildings etc. can cause a "wind tunnel"
effect.
ensure the unit is not positioned so as to allow detection of
cars/people using public thoroughfares adjacent to your
property.
ensure that the unit is mounted securely, even the slightest
movement can result in a false detection.
Check that the power is switched On at the circuit breaker/
internal wall switch.
Turn OFF the power to the unit and check the wiring
connections as per the diagram (see previous section 3).
ensure no connections are loose.
Check the bulb. if the bulb has failed, replace (do not hold
bulb directly with fingers, use a tissue or clean dry cloth).
ensure that the bulb is seated correctly in the bulbholder.
Refer to section 4 for DUSK control adjustment.
Refer to section 4 for DUSK control adjustment.
Unit may be poorly located. See previous section - ‘Selecting
The location’ and re-locate the unit.
piR sensors are influenced by climatic conditions. The colder
the ambient temperature, the more effective the sensor will
be. You may need to make seasonal adjustments to the sensor
head position to ensure trouble-free operation all year round.