Hvorfor bliver mit bevægelsessensorlys ved med at tænde og vil ikke slukke

Bevægelsesaktiveret belysning er en af de bedste belysningsløsninger til moderne hjem. Den mest effektive energibesparelse opnås ved helt at undgå den strøm, der ikke er brug for, og som ikke anvendes. Belysning med bevægelsessensor kan håndtere dette perfekt ved automatisk at slukke lyset, når man forlader rummet.

Indhold

• Problemet opstår efter første installation 
• Lyset fungerede fint, men vil nu ikke slukke

Uanset om du bruger en lyskontakt med bevægelsessensor, en tilstedeværelsessensor, eller en belysning med bevægelsessensor, har de alle det samme formål: automatisk at styre tænding og slukning af lyset for dig, og de fungerer alle på en meget lignende måde.

I den daglige brug kan belysning med bevægelsessensor støde på problemer, hvilket kan medføre mærkbare ulemper. I modsætning til almindelige afbrydere, som er mekaniske og manuelt betjente samt meget holdbare og stabile, indeholder lyskontakter med bevægelsessensor elektroniske komponenter som bevægelsessensor og IC-kredsløb til styring af lyset, som er mere følsomme over for eksterne påvirkninger som betjeningsfejl og overspænding. 

Men bare rolig, lyskontakter med bevægelsessensor kan også være yderst holdbare, især kontakter baseret på PIR-bevægelsessensorer. For det meste skyldes problemerne uhensigtsmæssige manuelle justeringer, der ligner en fejl eller defekt, men som hurtigt kan rettes.

I denne vejledning forklarer vi, hvorfor din belysning med bevægelsessensor bliver ved med at tænde og ikke vil slukke. Uanset om du bruger en lyskontakt med bevægelsessensor, en fritstående tilstedeværelsessensor eller belysning med integreret bevægelsessensor såsom natlamper eller lysbånd, kan du benytte denne vejledning, da årsagerne og symptomerne stort set er de samme.

Problemet opstår efter første installation

Når din belysning med bevægelsessensor bliver ved med at tænde og ikke vil slukke efter den første installation, skyldes det typisk manglende korrekt justering af bevægelsessensoren. 

Mulige årsager kan være:

Personer i nærheden af bevægelsessensoren

En udbredt misforståelse vedrørende en PIR-bevægelsessensor, som er den mest anvendte sensortype, er, at en PIR-sensor ikke bogstaveligt talt registrerer dig ved bevægelse, men derimod registrerer din tilstedeværelse via den varme/infrarøde stråling, din krop afgiver. 

Vi har set en del eksempler på, at folk tester bevægelsessensoren ved at stå til siden og vente på, at lyset slukker, mens de klager over, at lyset forbliver tændt. Det er meget sandsynligt, at bevægelsessensoren stadig kan registrere dig via sit brede detekteringsområde på 180 grader. Nogle gange kan din kropsvarme reflekteres af spejle og stadig registreres af bevægelsessensoren, selvom du står bag ved den.

Solution

To test the motion sensor light’s functionality, you should leave the interior room or stay far away from the motion sensor to ensure it cannot detect your body heat completely.

Motion Sensor Faces Wrong Direction

Another common mistake causing this problem is that people do not adjust the motion sensor after installation. Whether a motion sensor light switch on the wall, an occupancy sensor on the ceiling or a motion sensor light with the motion sensor built-in, it’s the same component- PIR motion sensor- that detects motion.

The PIR motion sensor’s detection range is fan-shape, 150 to 180 degrees wide and with a detection distance from 10 to 30 feet. So it’s crucial to adjust the motion sensor’s detection window, or known as the lens, to face and points right to the detection area, such as your front door or pathway. 

When the motion sensor is not facing the right direction, it might be able to collect the signal from all possible sources such as your dogs and cats, HVAC or the hot wind from your window, which may all trigger a PIR motion sensor as a valid “motion” to keep the light on.

Solution

Adjust the motion sensor to face the desired direction that it can cover and only cover the detection area, so the motion sensor can effectively receive the IR signals and not get distracted by noise sources.

Wrong Wirings

When installing a motion sensor or a motion sensor switch to an existing regular light, the light may still be able to turn on with the wrong wirings, but it cannot automatically turn off. 

The motion sensor is supposed to connect to the light’s load wire, so it can decide when to send power to the light or not, in order to control the light’s on or off. 

If the hotwire wires to the light’s load wire, the light is directly powered by your home source, and the motion sensor is bypassed and will not work at all. 

Solution

Re-check the wirings of your motion sensor light switch or occupancy/vacancy motion sensor to ensure the wirings is correct and the same as the manufacturer’s instructions.

You can follow our guide on how to wire a motion sensor to an existing light or how to install a light switch for more information.

Long Time Delay

The time delay is how long the light is still remained on after the motion sensor cannot detect any people in the area. In this case, if the default time delay is relatively long, such as 15 minutes, the motion sensor light might keep on after you have left the area and seem like it does not turn off. 

Additionally, as long as the motion sensor detects any motion again during the time delay, the time delay will reset and start counting from the beginning again. 

It’s a high chance that the motion sensor has been continuously detecting motion now and then before the time delay expires, so the light keeps ON, the time delay resets and the circle repeats.

Solution

Set the minimal time delay and see if your motion sensor light turns off by itself. If the delay is the issue, you can try and select different preset time-delay until you find the best value for your application.

High Sensitivity

Most motion sensors’ sensitivity is set to high by default, allowing the motion sensor to detect motion from a longer distance. 

Generally, a motion sensor has two levels of detection range. The motion sensor can detect large motion within the entire detection range while it would be more sensitive to detecting tiny and small motions more accurately with a relatively more minor detection range.

With a high sensitivity level, the motion sensor might also receive motion signals from distract sources such as moving cars or running animals from far away, thus keeping the lights ON and won’t turn off.

Solution

Select a low sensitivity level or completely cover the motion sensor to make sure it cannot detect motion and see whether the light will turn off. If sensor sensitivity is the issue, set a low sensitivity to fix this problem.

Lyset fungerede fint, men vil nu ikke slukke

When the motion sensor light was functioning well, but the problem suddenly popped out that the light won’t turn off, you can check the list below to locate the issue.

Motion Sensor is Stuck

The downside of a PIR motion sensor is that it is very sensitive and easily affected by power surges and power blinks. With the spike in voltage, the motion sensor can be stuck at either the ON or OFF position and not able to function properly again, so the motion sensor lights will stay ON or OFF regardless of motion detection. 

But look at the power surge from another perspective, it is not always a bad thing. It can be also used as a trick to keep the motion sensor light on when needed.

The power surge and blinks are very common in daily life, and a HAVC can easily cause a power surge that jams the motion sensor. So it’s quite possible that your motion sensor is stuck and need a reset.

Solution

Reset your motion sensor, motion sensor light switch or motion sensor light by completely shutting off the power for several minutes for the electronic to reset. 

If your motion sensor switch provides a quick reset to restore to the default settings, you can also try that.

Light Is Manually Turned On

Some motion sensor lights allow you to manually keep the light on, such as a manual override feature among motion sensor switches or an always-on button among indoor motion sensor lights. There are chances that the light is manually kept ON without you knowing.

Some people might also have added a parallel light switch to the motion sensor, so they can use the light switch to keep the light ON independently when the motion sensor is not available for a manual-on or manual control mode.

Solution

Reset, or exit the manual mode to see if the motion sensor light will work back to normal, or shut the power to the motion sensor to see if the light will turn off. 

If the light is still on without the power to the motion sensor, then there is probably a light switch that is powering the light somewhere else.