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Posted by jdagy on June 1, 2007, 10:20 pm
> jdagy wrote:
> > I have a Lenox A/C, about 12 years old. - when the a/c compressor
> > running it trips the 30 amp circuit breaker when it recycles. It
> > starts from a cold start ok, but after it has been running a while, it
> > will trip the breaker. Any suggestions. - I know I'll have to call
> > a technician but I would like to have a idea of what it could be.
>
> > thanks
>
> When the compressor runs, on one side the pressure goes up to maybe 250
> psi and the other side it goes down to maybe 20 psi - no surprise. When
> the compressor is off, the compressed refrigerant continues to flow
> through the system until the pressure is equal on both sides of the
> compressor. A compressor likely can't start against a large pressure
> difference. When the compressor can't start it draws a high current and
> trips the breaker (or an internal overload unit). This behavior is
> normal (including, for example, refrigerators) when the system tries to
> restart too soon. There should be enough time delay built into the
> thermostat to prevent short cycling from happening.
>
> You might want to time how long the system runs and now long it is off.
>
> --
> bud--
Bud, - thanks for the explanation, I had a tesh service it and they
found it to be over charged. Some valve was installed the wrong way,
he corrected it and it works fine.
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