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1 members (Scott35),
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Key:
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Joined: Jan 2006
Posts: 9
OP
Junior Member
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Sorry Guys,
Bad guys been a little frisky last couple of days.
The compressors, capacators and relays have been failing, no fan motors have failed as of yet. Reversing valves have also been a problem but I think that one is just crapy materials.
I am fighting with the supplier and trying to get these fixed under warranty and they are saying that because of our HZ being 60 vs 50 that is causing the units to fail. I and my electrical engineer do not believe that is the problem and I wanted some valuable advice from you guys.
Roger
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Joined: Feb 2006
Posts: 3
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Does the compressor actually have a 208/230 on the nameplate or is it 230 only ? I agree its more the voltage than the hertz. I am not a liscenced electritian but do have almost 20 years in the hvac trade. Even on proper power those units have a tough time starting in some cases, Is there any drop in voltage when the compressor tries to start ? Losing caps,relays and compressors really sounds like they are cycling on overloads on startup untill something goes. http://www.supco.com/ a "start assist/hard start" sp66 or something like that may be all thats needed have had to go that route on many of those even on 60 hz power. Ohh and another tip use the supplied flare nuts with the unit the large one has a thicker end than most and using premade ones or "standard" flare nuts tends to result in leaks when its in the heating mode.
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Joined: Jan 2005
Posts: 5,445 Likes: 3
Cat Servant Member
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Bad guys feeling frisky? I didn't realise there were any AHJ's in the 'stan! :-)
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Joined: Sep 2005
Posts: 153
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The nameplates say 230 / 50 Hz, that is what they are specified for. Typically +/- 6%, maybe 10% of voltage, and maybe +/-3Hz of frequency. Maybe additionally a maximum height above sea level is given.
If you run a device out of the range of the specs you'll loose the warranty. That is a law (almost?) everywhere.
So your main issue is just ridiculous to me and not worth any further discussion.
There are some devices that will usually run out of specs without problems but on your own risk. Those obviuosly don't. Some ideas for the 'why?' have been already mentioned.
Another question is maybe if it is possible to prevent future damage for the still running ACs by changes to the hardware. Is this still of importance?
Wolfgang
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Joined: Dec 2004
Posts: 1,064
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Afgan, where is the power 208Y coming from?
generator or utility provided?
The units that haven't failed, are they on the exact same power source as the ones that are failing?
Has anyone put a scope meter on the power to see the voltage waveform and frequency?
Dnk...
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Joined: Jan 2006
Posts: 9
OP
Junior Member
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Thanks for all the help, guess I am pretty much screwed on this one, just as I thought but wanted to run it by you guys. I am going on vacation tomorrow for a couple of weeks, will see how many more fail buy the time I get back. Thanks again, Roger
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Joined: Dec 2004
Posts: 1,064
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Bump......
Afghan, you around?
I am curious what you have found here to be the problem.....
Dnk...
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Posts: 57
Joined: August 2003
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