The motion sensor flashes red

Modern motion detectors with electronic components often have a small LED, which can flash in some situations. We have summarized for you what a red blinking LED with a motion detector can be for you in the following guide.

Motion detectors can be partially controlled

Modern motion detectors can trigger more than just a simple circuit. For this, the detectors must be equipped with an electronic control. Some motion detectors can be integrated into the smart home and thus operated via an app. Other less complicated motion detectors provide a simple programming code.

Red or green flashing code depending on manufacturer

The small LED light is required for this. For many motion detectors this LED may be red but also blink in green and other colors. As a rule, either an error is displayed or a specific setting of the detector is made.

Unfortunately, it is not possible to give a blanket answer, which is why your motion detector flashes red. For this you need the operating instructions of the manufacturer. In it you can read which flashing codes and flashing colors your motion detector uses.

Possible causes of red flashing light with simple detectors

In certain cases, however, it can be a simple error message. There may be various reasons why your motion detector is not working properly and then visualizes a red blinking code:

  • incorrectly connected
  • bad cable connection (eg corrosion)
  • unsuitable consumer (power consumption in watts of the consumer does not fit)

consumer with excessive current consumption Ein In particular, a consumer who requires too much power can quickly trigger an error message, causing the motion detector to flash red. Therefore, each motion detector is described with the power range in watts, in which the circuits are carried out without problems.

Error codes when operating an LED consumer

Motion detectors with LED lamps connected as consumers can also quickly output an error code. Simple motion detectors are just equipped with the circuit. However, since current is applied to motion detectors permanently, it may be that a certain residual current is forwarded to the consumer.

Similar problem with light switches and LEDs when L is directly connected

Connected LED lamps can react as if, in a circuit between light switch and consumer without motion detector, phase L (current carrying) is not switched off via the switch, but the neutral conductor N .

The phase is then directly at the consumer. According to VDE, this installation is permissible, but completely unsuitable for LED bulbs, as they will be permanently dim. This corresponds to regular operation, 24 hours a day. In other words, the lifetime of the LEDs is significantly reduced.

High-quality motion detectors with interruption relays

If LEDs are to be connected to a motion detector, make sure that no residual current reaches the load. Therefore, high-quality motion detectors are additionally equipped with a relay which switches the circuit only when the motion detector switches.

Tips & TricksIn the house journal, we offer you numerous guides and instructions on the topic of motion detectors. So you can also read here, which defects can occur on a motion detector.

Share with friends

Leave your comment