Timeguard MLSA360N - Manual (Page 19)

18
8. Troubleshooting Guide
Problem
Lamp stays ON all the time
at night.
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
The unit may be suffering from false activation. Cover the sensor
lens completely with a thick cloth. This will prevent the sensor from
"seeing" anything. If the unit now switches off after the set time
duration and does not reactivate, 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 section 4).
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 12 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.
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 lamp. If the lamp has failed, replace. Ensure that the
lamp is seated correctly in the lampholder.
The level of ambient light in the area may be too bright to allow
operation at the current DUSK setting. During the hours of
darkness, adjust the DUSK control slowly clockwise until the lamp
illuminates. Refer to section 4 for more details.
The level of ambient light in the area may be too dark for the
current DUSK setting. During daylight, adjust the DUSK control
slightly anti-clockwise. When the lamp load extinguishes, enter the
detection area. If the PIR still activates, the setting is still too high.
Repeat the above procedure until the PIR does not activate when
you enter the detection area. Refer to section 4 for more details.
Unit may be poorly located. See section 2 – ‘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.