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Octopus
Maybe the PL and SL are reversed..............
Discuss Problem with a timer fan on light circuit in the Lighting Forum area at ElectriciansForums.net
Ive disconnected the SL and with the light switch off if I touch it to the SL terminal and then remove it the fan runs for set time as its supposed to. It is something to do with the voltage constantly in the SL thats still sending a signal?Maybe the PL and SL are reversed..............
Yes 247 v switch on and 9 volts switch off, Fluke T120Are you 100% sure the SL isn't also a PL?
I'm not following, sorry. This seems to say your manual SL makes the fan work normally, but put SL on a light switch (that's connected to the same circuit) and it's playing up? If so, isn't it the switch? Hasn't got leakage current from a neon perhaps? Or a dimmer ?Ive disconnected the SL and with the light switch off if I touch it to the SL terminal and then remove it the fan runs for set time as its supposed to. It is something to do with the voltage constantly in the SL thats still sending a signal?
If I diconnect the SL once the fan has activated it runs and stops as normal once the time has elapsed. Which leads me to thinking because theres a constant voltage in the SL ( although only low) it dosnt think youve switched off.I'm not following, sorry. This seems to say your manual SL makes the fan work normally, but put SL on a light switch (that's connected to the same circuit) and it's playing up? If so, isn't it the switch? Hasn't got leakage current from a neon perhaps? Or a dimmer ?
You could put a small load on the SL and see if it fixes it? Pilot lamp perhaps?If I diconnect the SL once the fan has activated it runs and stops as normal once the time has elapsed. Which leads me to thinking because theres a constant voltage in the SL ( although only low) it dosnt think youve switched off.
Theres a couple of dimmers on the downstairs circuit. I have knocked all fuses off to all circuits bar the upstairs which hasnt got anyI'm not following, sorry. This seems to say your manual SL makes the fan work normally, but put SL on a light switch (that's connected to the same circuit) and it's playing up? If so, isn't it the switch? Hasn't got leakage current from a neon perhaps? Or a dimmer ?
no visible neons neitherTheres a couple of dimmers on the downstairs circuit. I have knocked all fuses off to all circuits bar the upstairs which hasnt got any
And they might not have had access to the countrys top electricians to sort it outmay be they had problems with the last fan ,that's why they tiled over the hole in the beginning.
I tested with a Fluke T120 Its not supposed to give a LCD readout below 12 volts but if I switched the light switch on it read 247v and when off it went down the scale and rested at 9 v. I usually just get red lights illuminated and a buzzer at 12 volts on the scale on the meter. Which tells me its less than 12What voltage did you have on the Switched live when it was supposed to be off?
if I pass the SL through my meter to the terminal on the fan this would have the same effect, would it not? Yes worth a try. It would tell me if a neon would work.You could put a small load on the SL and see if it fixes it? Pilot lamp perhaps?
Reply to Problem with a timer fan on light circuit in the Lighting Forum area at ElectriciansForums.net
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