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PIR AC LED Stair Motion Sensors Causing Lights to Stay On

zbyszekoziol 1578 12
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  • #1 21232778
    zbyszekoziol
    Level 2  
    Posts: 12
    Hi, can anyone advise me on PIR AC LED stair motion sensors? I have two sensors, one at the start and one at the end, 5 lights with 3 watt LED bulbs. Each time, after about two to three lights, the sensors hang up and the light does not go out. When I wanted to complain about them, the service technician said that something is sticking in them because there is too much voltage when switching on - LED bulbs at standard would not be like that and something needs to be applied before the sensors.

    Mini PIR motion sensor AC LED with packaging. .
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  • #2 21232786
    HD-VIDEO
    Level 43  
    Posts: 7947
    Help: 1255
    Rate: 1844
    External relay for 230V use
  • #3 21232824
    metalMANiu
    Level 21  
    Posts: 619
    Help: 11
    Rate: 241
    The sensor was made to work with fine lighting. So either it is faulty or it is a bubble.

    zbyszekoziol wrote:
    5pcs lamps with 3 watt led bulbs
    .
    A whole 15 watts. If someone proposes to use a contactor or relay for such a wattage then all the more reason to advertise this sensor.
  • #4 21232827
    zbyszekoziol
    Level 2  
    Posts: 12
    This service gentleman was not concerned with the wattage of all the bulbs. Just about the wattage of some start-up at the first start-up, which is too high. And causes some welding of the contacts.
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  • #5 21232834
    metalMANiu
    Level 21  
    Posts: 619
    Help: 11
    Rate: 241
    It is known, capacitors charge quickly drawing more current at start-up. But this is still not enough to cause a malfunction.

    Include the instructions for the sensor and the lamps you used.
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  • #6 21232841
    zbyszekoziol
    Level 2  
    Posts: 12
    The lamps are normal without sensors, so I bought the two sensors and fitted them.

    ePOWER motion sensor installation diagram. Light bulb from the 360 Line series with a traditional shape, 7W power, E27 socket, 4000K neutral color. Technical specifications for a motion sensor used with lamps. .
  • #7 21241103
    zbyszekoziol
    Level 2  
    Posts: 12
    Hi. Can I ask for help as I don't know what to do? I have connected this sensor now to just one lamp and everything is going, ie 1 unit. What do you guys think?
  • #8 21241404
    HD-VIDEO
    Level 43  
    Posts: 7947
    Help: 1255
    Rate: 1844
    Welded contacts with more lamps = poor quality relays.

    And you are able to open and show what relay is used there; it is possible that they can be replaced with something better.

    Or use an external company relay, e.g. Relpol with a 230V coil on a base
  • #9 21241431
    zbyszekoziol
    Level 2  
    Posts: 12
    >>21241404 I think so. But I will say that I can exchange for this expensive or better one because I don't have the strength anymore my wife cries that it's dark etc.
    I used to have this one too and it was done too. Packaging of the Orno PIR motion sensor model OR-CR-211. Technical specifications and settings of a motion sensor. .
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  • #10 21241476
    HD-VIDEO
    Level 43  
    Posts: 7947
    Help: 1255
    Rate: 1844
    After all, it is the same
  • #11 21241689
    zbyszekoziol
    Level 2  
    Posts: 12
    >>21241476 This one is similar, but I can exchange it for what you recommended.
  • #12 21241699
    Magic_moon
    Level 32  
    Posts: 2040
    Help: 193
    Rate: 335
    Buy a decent sensor and the problem is over.
  • #13 21245323
    zbyszekoziol
    Level 2  
    Posts: 12
    I would be happy to buy even for each lamp 1 piece. Just colleagues, which one is the decent one. I would like all the lamps to light up at once.
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Topic summary

✨ The discussion revolves around issues with PIR AC LED stair motion sensors that cause lights to remain on. The user reports that with two sensors and five 3-watt LED bulbs, the lights do not turn off after a few activations. A service technician suggested that excessive voltage during startup may be causing the sensors to malfunction. Responses indicate that the sensors may not be compatible with the total wattage of the bulbs, leading to welded contacts in the relays. Suggestions include using an external relay or replacing the sensors with higher quality options. The user expresses frustration and seeks recommendations for reliable sensors that can handle multiple bulbs effectively.
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FAQ

TL;DR: 15 W total (five 3 W LEDs) still made PIR stair sensors stick; "A whole 15 watts." Use a quality sensor or add a 230 V relay to handle inrush and prevent welded contacts. For homeowners and electricians fixing LED stair lights that stay on. [Elektroda, metalMANiu, post #21232824]

Why it matters: It shows how to stop stuck‑on stair lights and choose gear that won’t fail.

Quick Facts

Why do my PIR AC stair sensors keep the LED lights on?

Undersized or low‑quality internal relays can weld their contacts from LED inrush. Once welded, the lights stay on. As one expert put it, "Welded contacts with more lamps = poor quality relays." Offload switching or replace the sensor. [Elektroda, HD-VIDEO, post #21241404]

Is 15 W of LED load really a problem for a PIR sensor?

The continuous load is small, but the issue is inrush, not watts. With poor relays, even 15 W across five lamps can trigger failures. "A whole 15 watts" highlights that wattage alone isn’t the culprit. Choose better hardware or return it. [Elektroda, metalMANiu, post #21232824]

Why does the problem appear after adding two or three lamps?

Each extra LED driver adds to the total inrush at switch‑on. The OP noted the sensors hang after two to three lamps, then the lights never go off. That pattern points to cumulative surge, not steady power. [Elektroda, zbyszekoziol, post #21232778]

Will a one‑lamp test tell me if inrush is the issue?

Yes. With a single lamp, the sensor worked. That suggests the sensor only fails when multiple drivers switch together. It’s a strong indicator of inrush stressing the contacts. [Elektroda, zbyszekoziol, post #21241103]

How do I fix this without changing all lamps?

Add an external 230 V coil relay to offload switching. 1. Wire the PIR sensor output to the relay coil. 2. Switch the lamp group with the relay contacts. 3. Mount neatly and test with all lamps connected. [Elektroda, HD-VIDEO, post #21241404]

Is "too much voltage at startup" a real cause with LEDs?

Yes. LED control gear can draw 10–20 times nominal current for a few milliseconds at power‑up. That inrush can weld undersized mechanical contacts. Pick components with inrush‑capable ratings. [Tridonic, 2017]

Should I return or replace the PIR sensors?

If a sensor needs a contactor to switch only 15 W, it’s likely faulty or poor quality. Returning it is reasonable. A sensor designed for fine lighting should handle this load unassisted. [Elektroda, metalMANiu, post #21232824]

Can I repair the existing unit by replacing its internal relay?

Possibly. Open the sensor and check which relay it uses. You may replace it with a better relay if space and coil voltage match. This is for skilled hands only. [Elektroda, HD-VIDEO, post #21241404]

What external relay type is recommended here?

Use a 230 V coil relay on a base to offload the PIR’s contacts. Relpol models are a common choice for such retrofits. Ensure contact ratings exceed your lighting load. [Elektroda, HD-VIDEO, post #21241404]

Can two PIR sensors control the same lights safely?

Yes. Use both sensors to drive a shared external relay coil. Either sensor then energizes the coil and switches all lamps together. This avoids output conflicts between sensors. [Elektroda, HD-VIDEO, post #21241404]

Are my lamps the problem? Do they have built‑in sensors?

No. The OP confirmed the lamps are normal and do not have built‑in sensors. The trouble points to the PIR devices and their switching stage. [Elektroda, zbyszekoziol, post #21232841]

I want all lamps to light at once—what’s the best approach?

Trigger a single external relay from your staircase PIRs. The relay then switches the entire lamp group simultaneously. This centralizes switching and prevents stuck contacts inside the sensors. [Elektroda, HD-VIDEO, post #21241404]

Edge case: my light stays on even with one lamp—what does it mean?

The internal relay may already be welded. Once welded, the light remains on regardless of load size. Replace the sensor or move switching to an external relay. [Elektroda, HD-VIDEO, post #21241404]
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