occupancy sensor problem

[multimick]

evening all, i swopped an 8 ft florry switched by said sensor for two 5 watt led bulkheads (hispec) and the sensors now don.t switch the led's off even when turned the time right down, there are two sensors but the other one is just connected to an old florry which is being swopped tomorrow for two more 5 watters which will make the total load 20 watts .Do these sensors have a minimum load requirement? Not sure on make they have a red and a green light on them.

 

[tazz]

They use standard relay switching, so the is no minimum loading. Sounds like one pir is holding the other pir on, How have you wired the sensors..?

 

[Leesparkykent]

Some PIR's have a minimum load requirement. Find the make of the PIR and look for the specification on google. For example the danlers WAPIR has a minimum load requirement of 40w.

 

[multimick]

thanks tazz not wired them they were existing, might take one of them out of the equation tomorrow and then try again ,can't see a make on them except for a bmi sticker on the base.I always thought you had to have a master and slave to have 2 sensors controlling same lights ?

 

[tazz]

Basic relay in each, Com & NO......so Line & neutral to power pir, with switch line to light fitting on NO...possible wire link across Line & Com. To setup turn lux level & pir time to minimum.

 

[multimick]

went back today ,increased total load to 20 watts still won't switch off so put it on a switch,wholesalers seem to think there is a minimum load on most sensors of about 30 watts ?

 

[ImpededLoop]

Could be the inductive load of the LEDs has damaged the PIR relay. What rating is the PIR?

 

[multimick]

Could be the inductive load of the LEDs has damaged the PIR relay. What rating is the PIR?

don't know there is nothing on it, but it was switching 2 8 ft florries before so must be quite substanstial. Also couldn't find breaker yesterday so connected up live the led's came on instantly because the sensors were closed circuit so they never actually switched anything and only 4x 5 watters anyway .found breaker today and turned off circuit thinking it might work. But put them on a switch now cause at 20 watts it isn't as important to have it on a sensor .However got another room to do with 8x 5 watt bulkheads so don't want same thing hapening again

 

[Deleted member 26818]

Are these Dali type PIRs?

 

[multimick]

there is nothing on them name wise,they are round,white have a red and green light and a lux and time control on the side together they twist off the base ,thats it

 

[Deleted member 26818]

Dali type lighting systems use extra low voltage for control.
You mention that the PIRs have adjustable Lux levels, which suggests that they will only operate when lighting levels fall below the lux level set.
In other words they will only work at night.

 

[multimick]

deffo not elv and they worked before as an occupancy sensor ?