southsparks
Junior Member
Two months ago I was asked to fit some (supplied) LED light fittings to a building frontage, three are PIR type, and two without. Just recently
the three PIR type have started flashing on & off every time they are triggered. The other two are working OK. It just happens this
circuit is photo-cell operated, so the PIR fittings are turned on & off every day. I realise that PIR fittings should be fed from a permanent
supply, but I thought it would be OK to use the PIR ones on that circuit. I have done all the usual checks to fittings supply, and tried by-passing
PIRs, to no avail. It looks like the drivers are now at fault. I have taken them down & hope to be asked to fit non-PIR type, to simplify the
set-up, to all on dusk to dawn. I think otherwise, I would have to run a separate circuit for any new PIR type fittings, and leave the others
on the photo-cell. Would this regular switching off & on every day be the cause of the fittings drivers to fail? The instruction say the lamps can
be turned on & off up to 15,000 times. They are LAP make & 50watt. I wasn't too keen on mixing the two types of fitting on the same circuit
but thought it wouldn't matter if the three PIR fittings went through their switch-on test mode each day. Looks like I was right to be concerned
about the possibility of a problem developing. I can mention that I tested all the fittings back in my work-shop and they still all strobe.
Has anyone else come across this problem? thanks for any help or advice you may have.
Southsparks.
the three PIR type have started flashing on & off every time they are triggered. The other two are working OK. It just happens this
circuit is photo-cell operated, so the PIR fittings are turned on & off every day. I realise that PIR fittings should be fed from a permanent
supply, but I thought it would be OK to use the PIR ones on that circuit. I have done all the usual checks to fittings supply, and tried by-passing
PIRs, to no avail. It looks like the drivers are now at fault. I have taken them down & hope to be asked to fit non-PIR type, to simplify the
set-up, to all on dusk to dawn. I think otherwise, I would have to run a separate circuit for any new PIR type fittings, and leave the others
on the photo-cell. Would this regular switching off & on every day be the cause of the fittings drivers to fail? The instruction say the lamps can
be turned on & off up to 15,000 times. They are LAP make & 50watt. I wasn't too keen on mixing the two types of fitting on the same circuit
but thought it wouldn't matter if the three PIR fittings went through their switch-on test mode each day. Looks like I was right to be concerned
about the possibility of a problem developing. I can mention that I tested all the fittings back in my work-shop and they still all strobe.
Has anyone else come across this problem? thanks for any help or advice you may have.
Southsparks.