Timeguard NSLB2000 User Manual
Page 7
SectIoN SeVeN
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
apparent reason.
❏
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.