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Originally Posted by jboyce767

I have a carrier 30rap every morning I show up to work and I have a A200 and A201 fault I can reset the fault and unit works good during the day. I pulled the flow switch out and cleaned it Flow switch sense flow when I go to reset the fault could I still have a bad flow switch or the interlock or what else should I check

You need to start a new thread instead of hijacking and resurrecting a 9 year old thread.

I have a carrier 30rap every morning I show up to work and I have a A200 and A201 fault I can reset the fault and unit works good during the day. I pulled the flow switch out and cleaned it Flow switch sense flow when I go to reset the fault could I still have a bad flow switch or the interlock or what else should I check

Originally Posted by Nuclrchiller

Pressure does not indicate flow. Pressure does not activate a proof-of-flow interlock. Differential pressure can do these things. That would be the difference of the entering (or incoming) and leaving (or outgoing) water pressures. You say they both barely reached 10 PSI (I presume you meant 10 PSIG?). Then you "closed off the outlet valve", which would actually stop the flow. My advice is to get somebody experienced with chilled water systems, and that model chiller, to look at this. Severe, catastrophic damage can result with failed chilled water flow interlocks.

Very much agreed!

Pressure does not indicate flow. Pressure does not activate a proof-of-flow interlock. Differential pressure can do these things. That would be the difference of the entering (or incoming) and leaving (or outgoing) water pressures. You say they both barely reached 10 PSI (I presume you meant 10 PSIG?). Then you "closed off the outlet valve", which would actually stop the flow. My advice is to get somebody experienced with chilled water systems, and that model chiller, to look at this. Severe, catastrophic damage can result with failed chilled water flow interlocks.

more information

Originally Posted by Unbeliever

All Carrier Chillers with scrolling Marquis provide onboard diagnostics as well as a description of the alarm by pressing the escape and enter key together. Also I find it easier to get the books by doing a Google search. Not much I have not found that way.

Thanks...

Guys thanks for the replies. I did get more info today full model: 30rap0255da02100
Incoming and outgoing water pressures barely reached 10PSI. I did close off the outlet valve and was able to build pressure to test my gauges, the flow meter then activated when it reached 20PSI. So now I know it does work. Now what I'm gonna look at tomorrow is the water circulating pump. That's the only other thing that I'll be able to do. If it's not working right i need to change it in order to get the pressure built up for the flow sensor to open. What do tall think? Am I on the right track?

All Carrier Chillers with scrolling Marquis provide onboard diagnostics as well as a description of the alarm by pressing the escape and enter key together. Also I find it easier to get the books by doing a Google search. Not much I have not found that way.

Thanks...

I think its a open interlock of the chilled water flow switch or the cooler pump ... i use to have the same on a 30hx carrier


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carrier 30 RAP

Hello
I'm new to this site and seeking help on 30rap carrier air cooled chiller. First time working on this unit and there is no paperwork on it. I keep getting an A 201 error which I did find out by searching online might be an interlock switch. Anyone have any advice on where I can start looking for it for testing