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-   -   having trouble with a wall timer that will not switch (http://www.diychatroom.com/f18/having-trouble-wall-timer-will-not-switch-24782/)

kenny357 08-05-2008 05:00 PM

having trouble with a wall timer that will not switch
 
i have brinks wall timer that will not switch on my porch light. i thought that the first one i bought defective and returned it, but no luck. the hook up is pretty straight forward black to hot, blue to load(light) red for 3 way switch no luck can someone please help

Yoyizit 08-05-2008 08:39 PM

An open circuit downstream [burned out bulb, open switch] will probably unpower the timer and then you have to reprogram it.

In operation these switches need current flow through them to give a few volts drop across them, and this voltage drop powers the internal electronics and timer memory.

If it were an old switch on a known good circuit I'd say spray contact cleaner into it.

Ash 08-06-2008 06:47 AM

If it is the kind of switch that requires constant load then try to 'load' it with a few uF (less than 4) / 250 V capacitor designed to work on constant AC (can be found in alot of fluorescent fixtures and motors)

If you use a fluorescent fixture with capacitor across the mains input then use this one. This kind of fixture can operate without the capacitor or with it being connected in remote location. move it out and connect it as said

Make sure the timer tolerates capacitive load. Some dont. If it is designed for fluorescent lights then i'd expect it to be ok to do the capacitor hack

Also if you have a switch that bypasses the timer it may shut down the timer as soon as you turn on the switch. Use the control wire of the timer instead




Some timers dont rely on constant load and require they own neutral instead. They are way more reliable. Use one like this if you can

Yoyizit 08-06-2008 12:57 PM

Quote:

Originally Posted by Ash (Post 146357)
If it is the kind of switch that requires constant load then try to 'load' it with a few uF (less than 4) / 250 V capacitor designed to work on constant AC (can be found in alot of fluorescent fixtures and motors)

If you use a fluorescent fixture with capacitor across the mains input then use this one. This kind of fixture can operate without the capacitor or with it being connected in remote location. move it out and connect it as said

Make sure the timer tolerates capacitive load. Some dont. If it is designed for fluorescent lights then i'd expect it to be ok to do the capacitor hack

Also if you have a switch that bypasses the timer it may shut down the timer as soon as you turn on the switch. Use the control wire of the timer instead




Some timers dont rely on constant load and require they own neutral instead. They are way more reliable. Use one like this if you can

You are good!

J. V. 08-06-2008 02:49 PM

[quote=Yoyizit;146230
If it were an old switch on a known good circuit I'd say spray contact cleaner into it.[/quote]

Non flammable of course! :eek:


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