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Old 01-25-2010, 04:44 PM   #1
njd
 
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Multi Vapor fixture problem


Have several 250w Multi Vapor fixtures - all doing the same thing:
Turn them on and they come on 'dim' as the arc starts up
then they go out, wait 3-5 minutes and repeat. Tried a new
lamp in one - does the same thing. Fixtures are 2 years old and in an
unheated area. Temps today were about 40 deg F.
Fixtures mfg by 'EconoLight'. Checked and found 120 VAC at the fixture.
Any ideas for troubleshooting?

Thanks!

NJD
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Old 01-25-2010, 07:20 PM   #2
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Sound like capaitor is shorted out before we can go any more further on this due this luminaire this is standard probe start or pulse start that will make the diffrence on troubleshooting. And check the ballast info it should be right on the sticker like example M-138 or M158 one of the two the latter is pulse start verison. 2 year old luminaire should not act up like that fast unless you have wrong bulb in first place what the bulb number it should be stamped on the bulb itself myself or other can able indentfiy it. Merci,Marc
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Old 01-25-2010, 09:48 PM   #3
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Marc:

Thanks for your reply.

Luminaire is E-LB2M25Q - http://www.e-conolight.com

Manufacturer no longer lists.

Luminaire came from distributor supplied with this lamp: Luma MH250/U/E

I am not at the location where the luminaires are - but can get the ballast info tomorrow if you still need it.

They have 8 out of 8 that have failed. Installed March of 2008, started failing last fall to where now there are none really working.

Owner of property advised me that one of them eventually came on and stayed on tonight - took over an hour though...

Any ideas?

Thanks

Neil

edited to reflect new info on type of luminaire

Last edited by njd; 01-26-2010 at 04:00 PM.
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Old 01-25-2010, 10:41 PM   #4
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If you do not have PS symbol in there then you have wrong bulbs that how it kill it fast.but please do get the ballast info to make sure you are on the correct one. The pulse start will kill the probe start system I have see that often. Merci,Marc
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Old 01-26-2010, 03:57 PM   #5
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Marc:

Thanks for staying with me on this.

I was wrong above - it is a probe start luminaire - web site has changed since I purchased. The luminaires worked for 1.5 years with the existing lamps - ANSI M58.

Info from ballast:
CW Autotransformer Ballast
250W M58 Metal Halide or
250W H37 Mercury Lamp
... Listing of tap voltages and Amp draws ...
15mFd 400V Cap

Capacitor is actually 15mFd 450V. Oil filled, appears in good shape.
No leaks or bulges. Has a 510K Ohm 5% resistor across it's terminals.

No other components inside the housing. Transformer and capacitor case both grounded.

While I had the luminaire on the bench I went ahead and let it warm up to room temperature and still have very inconsistent behavior. Starts sometimes but usually just starts a dim arc then 30 - 45 seconds later I hear a series of clunking / clicking (from ballast?) then it goes out. ~5 minutes later this repeats. During the 5 minute wait there is a very very slight arc (inside the arc tube) between the terminal nearest the probe and the probe terminal itself.

Thanks again for your time. Let me know what you think.

Neil
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Old 01-27-2010, 01:42 AM   #6
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Sound like you have bad ballast or capaitor.( some case both go bad at the same time )

If you can get ahold of the manufacter maybe they will help you with the situation and with pretty new ballast it should not go out that soon.

I know normally they will warranty it for one year however ask them to see what they can do about the ballast I think they may want to deal with it so give them a buzz to see what they suggest it.

Merci. Marc

Last edited by frenchelectrican; 01-27-2010 at 01:46 AM.
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Old 01-28-2010, 06:40 AM   #7
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Thanks Marc, I'll see what they say. Neil
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