ReplyCould be the potentiometer as well. The chiller the YCCH usually belongs to is YS.
Professional Member
I have a call I need to go look into on a ycch233s. the cust, says that the slidevalve is getting stuck and won't unload. from what he is telling me it sounds like the solonoid is the problem more then the valve. I did a search on this and found zip so I am hoping that some of you have some experiance or advice. also if anybody has any bulletins on this machine that would be great. Also what other machines (M#) would have the same compressor so that I can reseach that. thanks
Professional Member
Could be the potentiometer as well. The chiller the YCCH usually belongs to is YS.
"Quality exists, when the price is long forgotten."
Henry Royce
Professional Member
nique, IMO you need to apply for Pro status. I won't go into the details of possible solutions for this compressor on the "open" forum.
Unlikely. Potentiometer wouldn't prevent it from unloading.Originally Posted by Entropie
Professional Member
ya prob right, I have just never taken the time to do so.
Professional Member
Here's a link to the IOM manual on JCI's site.
Professional Member
You are right, but customers usually refer to the slide valve position only as indication. The corresponding motor current will tell you the truth. We don`t know if the compressor is still running, in ice storage mode, prevented from starting, tripping on low LWT, etc.
"Quality exists, when the price is long forgotten."
Henry Royce
Professional Member
thanks for the manual. I believe this machine uses the big spring to unload so that may be a problem. from my conversation with the cust, the unit will load and unload below 50% but once it goes over 50% it shoots all the way to 100% and then won't unload, it just stays there. so obviosly the slide valve is not stuck. He did not know if the potentiometer had ever been messed with or if the brass rod had been changed. another company has been working on this unit for some time with no luck so he asked me to come and have a look. so just trying to get some ideas before I head out.
Professional Member
You might want to read pages 44-45 of the manual before you go check it out.
Professional Member*
Is this the page that says may cause severe injury or death??
Professional Member
No, but that certainly should be taken into consideration! The pages I referenced describe the operation of the slide valve.
Professional Member
I had a look at the unit today and found the following:
During the first few minutes of operation the unit will unload and load both normal and manual.
After a few minutes the slide valve will only load even if the unload valve is manually actuated.
If all the wires are removed it holds stable, until I try to unload it either electrically or manual in which case it only loads.
Luckily this has a sister chiller so I swapped the solenoid assembly and discovered no change still loading with no unload.
Professional Member
Sorry its a York YS EC EB S4CRA Chiller
Regular Guest
have you fixed this thing yet?
Professional Member
nope, I have been looking into different things but nothing yet. because of the run hours customer is debating replacement. I am fairly certain the valve needs fixen but JC won't sell the parts as they want the comp back so they can do it. and thats alot of money for a unit that old. any suggestions?
Professional Member
Two...ask a moderator to move this to the Pro forum so a more in depth discussion can occur and what happens if you set the current limit to a specific value?
Professional Member
been in the proforum too and not alot there either. even with the current limit set the unit still creeps up. the only way it holds is if i shut both lines (load/unload) manualy with the service valves.
Professional Member
Hi fella's.
I realise this post is old, but I wondering if anyone can help me out with a manual on the replacement of shaft seal on the YCCH233 compressor, S4 size, on R22. Help would be greatly appreciated.
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