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Thank you very much, this document is very useful.

This has happenen in Spain to me after three years,two compressors have been gone in two months Carrier 30RB-260 ,to be able to change the configuration,do you need the factory pasword?i have the user...

https://www.scribd.com/doc/144702295/30-Series-Issues

AI

and the original poster was only here for one day 12 years ago !

Originally Posted by hvac-latin

Do you think it is possible that the excitation frequency is close to the resonance band and therefore causing excessive vibration? Is there any way to test this?
I have had several 25 ton Danfoss compressors damaged, the pressures and temperatures were fine, the superheat was fine, the amperage was fine too. Suddenly it started making noise and after 2 weeks it died.

May I ask how you decided to sign up and reply to a thread that is nearly 5 yeas old? Just curious about this phenomenon of people responding to age old threads.

Do you think it is possible that the excitation frequency is close to the resonance band and therefore causing excessive vibration? Is there any way to test this?
I have had several 25 ton Danfoss compressors damaged, the pressures and temperatures were fine, the superheat was fine, the amperage was fine too. Suddenly it started making noise and after 2 weeks it died.

I have had multiple danfoss failures. it is a compressor problem just about ever time. most of mine have been an internal failure. I wish they would get away from danfoss

Because of who I work for I might need to be careful ! There are to my knowledge no bulletins, just my observations. The software change is only re-active in that in the past if the contactor had welded in and the circuit shut-down the fans and exv shutdown regardless. What I believe happens now is if the controller thinks the contactor is welded in the exv and cond fans carry on controlling. If the chiller has an hydraulic pack it will keep the pump on even if remotely commanded off. An alarm is flagged to draw attention to the problem.

Originally Posted by ajayl

I've seen compressors failing when the compressor contactor has welded in (a software update was made to identify this and attempt to prevent catastrophic failures) but in general these have been fairly reliable. What I have seen on other similar systems is the cross contamination, inevitable with this type of set-up, being responsible for cycles of compressor failures. The installation of suction burn-out driers and carrying out multiple oil changes on all compressors usually breaks the cycle.
The oil level issues seem to still be present; in addition to dropping the oil levels, altering the loading to priority loading can help.

It's funny you say that because I noticed the second stage compressor get energized and then it would seal itself in, I thought the contacts were sticking. Do you have a bulletin on the versions affected.

I've seen compressors failing when the compressor contactor has welded in (a software update was made to identify this and attempt to prevent catastrophic failures) but in general these have been fairly reliable. What I have seen on other similar systems is the cross contamination, inevitable with this type of set-up, being responsible for cycles of compressor failures. The installation of suction burn-out driers and carrying out multiple oil changes on all compressors usually breaks the cycle.
The oil level issues seem to still be present; in addition to dropping the oil levels, altering the loading to priority loading can help.

Gibbo please pm me when you get a chance please, stan

No issues with Danfoss compressors or EXV's. We did have an issue with high oil levels on B circuits causing low sst can't remember the which size chiller was affected. As to Copeland compressors replacing Danfoss I have not heard anything over here.


Gibbo

Cannot see this being true I would like to see this in writing. Fake news ?

compressor replacement for danfoss

Originally Posted by acjourneyman

I just quoted 2 compressors on one chiller, both were the B compressors drawing locked rotor. You are getting screwed on your parts pricing though, because they were a 1/3 of that price from Carrier.

They are replacing the danfoss with Copeland scrolls FYI Carrier is recommended this. So if this the case can you mix and match them with danfoss and a Copeland in the same circuit?

Some of these units also had Sporlan EXV's and communication modules. Mostly earlier years. Then Danfoss became the replacement part, but you had to order the communication board as well. -GEO

I just quoted 2 compressors on one chiller, both were the B compressors drawing locked rotor. You are getting screwed on your parts pricing though, because they were a 1/3 of that price from Carrier.

Have a slew of these Chillers 30Rbs with A circuit compressor failures. I read the super heat setting change to 9F from 7F what year did this start? I got a 2006 year and some 2012 year chillers with failures. Just curious

There shouldn't be a problem with the valves then. The Danfoss EXV's seem to be a good reliable valve. There was a problem a few years ago with the Danfoss TXV's. But I don't think they were used on the 30RB's. It was just a thought.

Originally Posted by chilbrig

What kind of Expansion Valves are on these chillers?

All I have ever seen is a Danfoss.