人感センサーライトが何度も点灯し、消えない理由

人感センサー付きライトは、現代の住宅に最適な照明ソリューションの1つです。最高の省エネとは、不要で使われていない電力を完全に無くすことです。人感センサーライトは、人が部屋を出ると自動的に消灯するため、これを完全に実現できます。

目次

• 初回設置後に問題が発生する場合 
• 正常に動作していたライトが消えなくなった場合

使用しているものが 人感センサースイッチ, であれ、 人感センサー, であれ、 人感センサーライト, であれ、すべて照明の点灯・消灯を自動化するという同じ目的を持っており、非常に似た仕組みで動作します。

日常の使用において、人感センサーライトにはいくつかの問題が発生することがあり、不便を感じる場合があります。耐久性と安定性に優れた手動操作の機械式標準ライトスイッチとは異なり、人感センサーライトスイッチには 人感センサー や照明制御用のIC回路などの電子部品が含まれており、誤操作やサージ電流といった外部要因の影響を受けやすくなっています。 

しかし、ご安心ください。人感センサーライトスイッチ、特にPIR人感センサーベースのスイッチも非常に高い耐久性を備えています。多くの場合、問題は故障やエラーのように見える不適切な手動調整によるものであり、簡単に修正できます。

本ガイドでは、人感センサーライトが何度も点灯し、消えなくなる原因について解説します。人感センサーライトスイッチ、単体の人感センサー、あるいはフットライトやテープライトなどの人感センサーライトのいずれをお使いの場合でも、原因と症状はほぼ共通しているため、本ガイドをご参照いただけます。

初回設置後に問題が発生する場合

初回設置後に人感センサーライトが何度も点灯し、消えなくなる問題が発生する場合、通常は 人感センサーの適切な調整. 

が行われていないことが原因です。考えられる理由は以下の通りです。

人感センサーの近くに人がいる

最も広く使用されているPIR人感センサーに関する一般的な誤解として、PIR人感センサーは文字通り「動作」や「動き」によって人を検知するのではなく、温かい身体から放出される熱（赤外線）によって人の存在を検知している点が挙げられます。 

We’ve seen quite a few people testing the motion sensor by standing aside, waiting for the light to turn off and complaining the lights keep on without turning off. It’s highly possible that the motion sensor can still detect you with its wide 180 degrees of detection range. Sometimes, your body heat can reflect from mirrors and still be seen by the motion sensor even when you’re standing behind the sensor.

解決方法

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.

解決方法

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. 

解決方法

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.

解決方法

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.

解決方法

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.

正常に動作していたライトが消えなくなった場合

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.

解決方法

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.

解決方法

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.