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Problem with AC comressor fast cycling

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Problem with AC comressor fast cycling Hareti 02-21-2007
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Posted by Hareti on February 21, 2007, 9:03 pm
Hello,

Having some trouble with a 25 ton AC system. After a few minutes of
running the compressor starts cycling very quickly - on and off every
3 seconds or so. When it's doing this the supply pressure guage show a
fairly steady 130 psi. The suction pressure guage rises to about 40
psi when the compressor is running and drops to about 20 psi when
stopped. It's not HP cut out, the condenser is getting plenty of
cooling water. It's not motor overload either. What's going on?
Expansion valve not opening properly?

Any suggestions appreciated...


Posted by Noon-Air on February 21, 2007, 9:08 pm
LPCO

> Hello,
>
> Having some trouble with a 25 ton AC system. After a few minutes of
> running the compressor starts cycling very quickly - on and off every
> 3 seconds or so. When it's doing this the supply pressure guage show a
> fairly steady 130 psi. The suction pressure guage rises to about 40
> psi when the compressor is running and drops to about 20 psi when
> stopped. It's not HP cut out, the condenser is getting plenty of
> cooling water. It's not motor overload either. What's going on?
> Expansion valve not opening properly?
>
> Any suggestions appreciated...
>



Posted by on February 21, 2007, 9:20 pm
wrote:

>LPCO

        Licensed Professional Contractor needed, Obviously

>
>> Hello,
>>
>> Having some trouble with a 25 ton AC system. After a few minutes of
>> running the compressor starts cycling very quickly - on and off every
>> 3 seconds or so. When it's doing this the supply pressure guage show a
>> fairly steady 130 psi. The suction pressure guage rises to about 40
>> psi when the compressor is running and drops to about 20 psi when
>> stopped. It's not HP cut out, the condenser is getting plenty of
>> cooling water. It's not motor overload either. What's going on?
>> Expansion valve not opening properly?
>>
>> Any suggestions appreciated...
>>
>

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Posted by on February 22, 2007, 5:57 am

> wrote:
>
> >LPCO
>
> Licensed Professional Contractor needed, Obviously

He took that "hook, line and sinker" lol



Posted by on February 22, 2007, 9:15 am

>
>> wrote:
>>
>> >LPCO
>>
>> Licensed Professional Contractor needed, Obviously
>
>He took that "hook, line and sinker" lol
>

        Damn, he's STILL chewing on it 2 days later ....


--
Click here every day to feed an animal that needs you today !!!
http://www.theanimalrescuesite.com/

Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'
'With sufficient thrust, pigs fly just fine.'
HVAC/R program for Palm PDA's
Free demo now available online http://pmilligan.net/palm/

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