Main causes:

Range control set on minimum

Radial movement away from the detector or towards the detector

Outdoor: the sensor/detection range is directed too sharply downwards.

Outdoor: rain, fog or humidity

To resolve these, try adjusting the sensitivity. Please consider the human head emits the most heat and therefore should be within the range.The upper detection level should be at average forehead height or above.

The installation site should be adjusted for frontal approach. Installation in the center of the corridor or in door-frame improves the radial motion towards the detector.

Install the sensor offset to one side.

Also, make sure that an open door does not obstruct the detection range of the sensor. The range can be limited by humid air and rain showers. All Swiss Garde 360 ceiling detectors have a range control dial (for sensitivity control adjustment). Increase the range indoors, if no other disturbance factors are present.

The main causes are temperature changes or direct approaches. High outdoor temperatures and poor visibility conditions due to fog, rain or snow can temporarily reduce the range. Oversensitivity occurs when sources with high temperatures pass through range at quickly such as trucks, trains or buses. Due to the warm air vortices that spread out over vast distances, a detector can be triggered, even at a considerable distance from the actual source (up to 50 m). In such cases, tilt the outdoor detector further downwards.

Light bulbs in the detection range of draughts, wind, power fluctuations may cause interference. In daytime constant movement in the detection zone such as vehicles, wind in shrubs or trees, fans, lights switching on and off, can jam the detector. In this case cover the whole detector with a small box (or original packaging) and wait to see if the BM completely switches off. Ensure that the box is sits correctly, not held up by hand. If the light turns off after the set delay time and does not switch on again, the interference is an outer source of the detector is in correct working order. Otherwise, the cause could be the load connected to it. When interference is due to external sources, the detector lens needs to be redirected or the parts of the lens picking up interference should be covered.

If the detector is used in daytime, sunlight can also cause problems e.g. due to reflections on smooth surfaces (desks, etc.).

Inductive load switching or power supply switching: For inductive loads or automatic staircase lighting timers, up to 4 motion or presence detectors can be switched in parallel. If you multiple detectors are required in a lighting group, use a master/slave configuration.

Inductive loads,

Interference
Reflective surfaces etc.
Constant movement in the detection area
Daytime
Inductive loads:
Fluorescent lamps, energy-saving lamps, electronic ballasts, transformers, etc. are inductive loads that produce a reverse voltage. To protect the detector, an RC quenching unit (snubber) should be inserted in parallel with the load between the intermediary phase and the neutral wire.

Mirrors, cabinets, light marble, and sometimes water drops on the lens may cause malfunctions. Infrared rays are reflected, and can trigger unwanted switching. Heated floors or facades, as well as ventilation in the detection zone can also reduce the range. The affected area of the lens causing interference should be covered with blinds or tape.

The connected lamp is defective or incorrectly connected (L’).

No mains voltage present

Twilight value was set too low (dark)

The detector was wrongly connected

No clear view of the moving object

Check the light bulb, the power supply, and the twilight control. Turn the twilight control to very bright (2000 lx, Sun symbol). On the short-pulse setting, the light will switch on briefly (only 20 or 60 s after the set pause-time).