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that unit has two circuits I believe, force the lead to the other circuit and see what happens.

faulty pressure switch? whats the pressure when the fourth compressor comes on?

have installed both rtac and 30xa in that neck of the woods with no problems (other then the noise from the rtac:)

Surely he means brushing, how bout when it needs it. Not until.

on all my systems i use feed controlls to test the hard water and add tower treatment accordingly, then I use makeup water usage to decide when to add the biocide. it usually takes a few months to...

is the unit wired to the flow switch or to the interlocks? I always let the chiller control the pumps, it makes most of those problems go away.

had the same issue recently. was going to try the same thing. let us know how it works

I know that it is controlled by the exv. what I'm saying is that you stated that your compressor superheat is 30 C. (80 F). you said that at full load your evap water temp is ewt is 13 C (55) and...

missed it on the first reading as celsius is about useless to me. you said that your superheat is 30 c. that equals 80 f. I allways set my 06E's for 18 to 24 F. at the compressors. get your...

its in my profile.

what exactly are you looking for? I've been away from that area for a while but still have some contacts.

it is a ucp1

did that to, no luck. it seems like common sense would say that what i want should be easy to do but! I was just hoping that somebody on here would know.
for the rest of the story as best i can...

I did, also stages.

I've taken the compressor out both refrigerant and electrical. But when any alarm for that compressor comes up the whole circuit drops. I tried the oil switch with the same result. Any other ideas?

That's the problem circuit 1 has two comp. "A" is a 100 ton and "B" is a 70 ton. Circuit 2 has "C" which is a 100 ton. I've taken "B" completely out of the circuit but the controls don't know...

I read that manual for half the night and never saw a thing for compressor lockout, what p# is it?

Sorry I was in a hurry, I need to get comp a to run but all the alarms shut down the circuit. Is there a way to make it so comp b never tries to start? It is a rtaa270 with adaptive control

I blew the b comp today and need to make it so a will run, only prob is that all the b alarms shut it down. How do I do this in the controls.

here is the update. I decided that the eprom had lost the program so I reprogrammed it and it would not hold. changed out the motherboard and eprom holds program just fine. it is like you said...

wye delta, checked all the wires and sensors and all are ok. stole a motor protector from another unit with the same result.

I have ycaso230e that is giving me a current overload alarm on both circuits. all volts are fine and when the unit runs for the seven seconds before trip it is reading twice the amps that my amp...

not sure, I was on the phone as I was reading this. I will be heading up in the next few days to check it out.

wierd, i just had a cust call and tell me that he has a leak in the stub of the econ, I told him that I've never seen that and then this. whats the odds.

06E, so it is r-22 I assume, i always keep my superheat between 18-22, and yes you can add oil when it's running just pump it in the suction side of the compressor. 1/4 to 1/3 of oil sightglass...

just scraped a chiller, so now I have two psio if anybody needs one. I'll let it go for a smidge under rcd price:grin2: heck I'll even program it for ya.

unless something has changed in the last couple of months they can, at least here they do. not really sure why the probs. I'm going to look into in the morn out of curiosity sake.

I have this crazy idea, how bout you replace the battery and reload the program.

I don't get that statement, "but up to the bottom side of the compressor head is flooding" what do you mean by that and how can you tell. if you have superheat you are not flooding. I think I know...

two points that I have talked to chemists about. first glycol that is below 30% reacts to temps different then would be expected, meaning that the glycol does have the ability to chemicly seperate. ...

I think you would have to try hard to get that in backwards as they weld up exactly like they come out. sounds like during the changeout things got dirty, maybe bad piping practices. they are...

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...

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...

carrier has already done all the homework for you. the vfd and controls are all available from them. been doing that retrofit for years, it works great no turbocors needed.

Sorry its a York YS EC EB S4CRA Chiller

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...

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...

ya prob right, I have just never taken the time to do so.

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...

is it possible that you lost the program and it just needs to be updated. whats it doing.

whats your ref temps (approach) will need more info to really help. also what fault is it giving.

I have been reading this for days and have been trying real hard to stay away but alas I cant. Carrier procedure is to add oil (1/2 gallon)to get machine to start, operate in a high load state,...

yep Carrier is headed right down that road. the fact of the matter is Carrier sees the big chiller service as a burden. they only want to do startup and warrenty work. it's the big "L" word, you...

talked to one of the "old boys" today and he said he ran into this problem not to long ago. had to give the control panel a better ground or in other words electrical noise. still since the unit is...

i've seen this once on a new startup, the wires were switched or terminated wrong. other then that I've never seen the alarm. another post from awhile back said that they had the coupling come loose....

pixels and etch a scetch you guys kill me. I'm sure it was the ribbon cable that was giving me the grief but I totally forgot about the display brightness buttons.

Ya like I said I never did get the explanation but oh what a mess. It was a dang good thing all the screens were in place to stop all the gravel. It was kind of funny at first cause we had just...

I got called out on a little 40 ton air cooled trane (lost the M# so bear with me) that is 2 years old. the unit would not operate and the touchscreen was blank. so after checking everything I could...

wow and I thought rydlym worked for everything. once had a cement truck driver dump his leftover in the cooling tower (never did get the explanation) anyway it filled two chillers. ran the rydlym...

depending on the size of the machine carrier changed from the pads to a internal heater. also like dallas said you need to check for when they are on, prob they are on when not needed.