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12 V halogen track (8 bulbs; replaced withLED); turned on Lutron dv600p dimmer; lights lit & frying sound; then off. all bulbs still good. Differential diagnosis for transformer vs Lutron problem?

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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VtToolMan
  • 704 Answers

SOURCE: replaced existing Lutron skylark low voltage dimmer

You will need to return the 3-way dimmer and get a single pole dimmer, as the Lutron Skylark series is suspectible to failure if connected to a live circuit first, or misconnected at intial installation. As an electrician, I ceased using these dimmers years ago, due to the rash of call-backs by customers and went with Leviton togglers and have had excellent results.

If you purchased it at a 'big box' store, they will accept the return as a defective item, as they have national agreements with their suppliers to accept customer returns. Just tell them it didn't work and you want a store credit, you can then purchase the lower priced single pole dimmer you need and save some money in the process too.

Hope you find this Very Helpful - best regards!

Posted on Aug 19, 2009

Testimonial: "I appreciate your help."

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protek480
  • 1730 Answers

SOURCE: when controlling a 300 watt cable lighting system

Sounds like a loose connection. If they all fo out, it's at the beginning of the circuit. Check all connections at the start of circuit.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

Posted on Sep 02, 2009

Testimonial: "That is very helpful and worth checking out. Thank you. Ben"

  • 66 Answers

SOURCE: Lutron Dimmer Not Dimming But On/Off Works

The type of track heads you are using could be creating the problem. Are the lamps Par 20, Par 30 (screw in base) or MR-16 low voltage (push in base)? If the track head has a small (2"x4") box and uses MR-16 lamps then you need to use a dimmer specifically designed for ELECTRONIC LOW VOLTAGE. Incandescent lights (screw in base) and Electronic low voltage need a different signal to dim. Using a standard dimmer for electronic low voltage will work for a while, but then either the dimmer or the fixtures will go bad. If your lamps are incandescent or halogen you may have just had a bad dimmer. (Not common for Lutron products) but the part number you list should be good for 1000watts and should not be the issue.
http://www.lutron.com/CMS400/TechInfoPage.aspx?id=25531

Please see "Dimming Basics" under the helpful information tab for a better explanations of the two different styles of dimming. Hope this helps!

Posted on Oct 09, 2009

  • 66 Answers

SOURCE: On/off works but dimmers do not. leviton toggle

If each pendant has an individual transformer that is about the size of a hotwheel then you need a dimmer specifically for ELECTRONIC LOW VOLTAGE. A lot of electricians don't know that the different types of lights require different dimmers. Most store bought dimmers are for incandescent lights only, and some nicer dimmers like the Lutron Maestro's are rated for incandescent or MAGNETIC Low Voltage which require a different Sin wave interuption. I don't know that leviton makes a dimmer in that style for Electronic Low Voltage. You could install a Lutron DVELV300P-Wh, but that is a Decora opening. http://www.lutron.com/CMS400/WorkArea/downloadasset.aspx?id=25437
Here is a link to explain the difference in how the dimmer needs to work. Good luck!

Posted on Mar 04, 2010

Testimonial: "Excellent answer! As Lutron is not available in my small town (on an island in Southeast Alaska) I will likely be ordering a dimmer online. Thanks!"

  • 107 Answers

SOURCE: Audio system buzz with dimmer-controlled track

It may be too late given the date of this post, but the buzzing has nothing to do with the bulbs (usually, dimmers and lamp buzzing are a common problem which is why you probably got the suggestion), but in your case, you have radio-frequency interference from the dimming circuit leaking into the audio circuit. The best things you can do is either minimize the RFI, or separate the audio circuit away from the dimming circuit. Based on what you're saying about the PC input, it sounds like the main culprit is that specific audio wire going between the PC and the sound system - can it be run differently so that its further away from the dimmer/circuit. Are the PC and the dimmer on the same breaker? - If so, maybe noise is radiating from the dimmer into the PC through the power wiring - putting on different breakers could help.
One more note, the best dimmers, in terms of RFI performance, are reverse-phase control dimmers (usually designed for electronic-low-voltage... and be careful because they often get confused with magnetic low-voltage... and those will not help. Without going into too many specifics, the ELV dimmers have a much softer on/off/on/off dimming cycle when compared to standard incandescent dimmers (this is a circuitry thing with a much more complicated explanation), but as a result, they tend to have significantly fewer issues with RFI. They can be an expensive solution for simple problem solving, but the MIRELV-600 should do the trick (again, don't be fooled, the MIRLV-600 is the magnetic low-voltage product, and for what you're doing, won't help).

Posted on Oct 04, 2010

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I am going to stick my neck out a little with this one although I agree with BoomerP. The clue of halogen bulbs is feeding my answer. Halogen bulbs require a high voltage transformer to operate and won't normally work with a dimmer but I never tried it. Bypassing the switch should bring them on though. If you have the proper voltage at the switch and they don't work with the switch bypassed, its probably a bad transformer in the fixture. Good Luck. Be careful.

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Sounds like the transformer in your track light. In the box where the green light is, the voltage is converted by a small transformer from 120v to 12v for the halogen lights. With the breaker off, try jumping out the dimmer going to the track light (disconnect the dimmer and connect the two loose wires from box together). With the breaker back on, if you have 120v power on the wires (black/white) going into the track light transformer (measured at the track light), and the green light won't come on, I'd say it's the track light transformer. You may have to replace the whole track if you can't get the transformer as a part.

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I have a Maestro dimmer on 2 20 w hallogen bulbs and the dimmer when turn off or on dims the lights rapidlyup and down.


When you say "halogen bulbs," are you referring to MR-16 (12-Volt) lamps off a transformer, or line-voltage halogen lamps. If using the MR-16s, then the fixture doesn't qualify as "incandescent" which is what the dimmer you have is rated for, and the behavior of the transformers within the fixture can cause the types of issues you're seeing. If it is a line-voltage (120-volt) halogen then, then it could be a number of things depending upon how "rapidly" and frequent the "up and down" is. Regardless, call Lutron's tech support number at 1-800-523-9466. They're available 24/7, they won't charge you, and they can help you sort this out.

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This, unfortuantely, is one of the usual challenges associated with dimming. The buzzing usually gets worse at around the 1/2 light level point. I don't think the issue has to do with whether the lamp is halogen, but rather how the lamp is physically constructed - and that differs from manufacturer to manufacturer. Long story short, I would take note of the lamps you purchased, and when replaced, I would opt for a different manufacturer.

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Replaced existing Lutron skylark low voltage dimmer


You will need to return the 3-way dimmer and get a single pole dimmer, as the Lutron Skylark series is suspectible to failure if connected to a live circuit first, or misconnected at intial installation. As an electrician, I ceased using these dimmers years ago, due to the rash of call-backs by customers and went with Leviton togglers and have had excellent results.

If you purchased it at a 'big box' store, they will accept the return as a defective item, as they have national agreements with their suppliers to accept customer returns. Just tell them it didn't work and you want a store credit, you can then purchase the lower priced single pole dimmer you need and save some money in the process too.

Hope you find this Very Helpful - best regards!

Aug 18, 2009 | Lutron Electrical Supplies

1 Answer

A fixture on a Lutron Maestro dimmer switch stopped working.


This dimmer was not made to dim a load smaller than 40VA. That halogen bulb would only have been 20VA or so.

http://www.lutron.com/cms400/PageBuyNow.aspx?id=16977&mn=1815

I think that when your bulb burnt out, the dimmer over-volted the transformer and smoked it. That said, I think you have a fixture problem and, possibly, a switch problem, too.

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Lutron Dimmer Not Dimming But On/Off Works


What is the dimmer rated for? Your load on the track appears to be 200 watts. A standard dimmer will burn out, you need to look on the dimmer to see what it is rated for. Did it run hot with the dimmer before you had this problem? They make dimmers for higher wattage that will do the job for you.

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