Help with Trane Series R

[AFatalo86]

Well I have an issue with 1 of two chillers here. I went up to the roof to check out a problem I had noticed. I noticed it in the trane computer program and noticed chiller number 1 was not running at all. It is a Trane Series R, two chillers, and two compressors per chiller. I would say it is a medium sized system, becuase I have seen a bigger Trane system. I'm just looking for a bit of help here.

I get to the Adaptive Control CH530 LCD and notice I got an error. When booting it says self test passed... and immediately following, I see this code.

ERR8: Held in boot by user key

Heres a little bit more of the information.

Application Part No. 6200-0343-29

Boot Part No. 6200-0432-10


I have now noticed on the Chiller #2 LCD that there is something that says "limit" next to the Circuit 2 and Compressor 2... I looked further into it and it says the blatant "low liquid level."

Both Compressors are running well and it is cooling off the park, however it is not balancing between the two chillers, becuase only one is running. I now have chiller 2 running the whole park. Incase you wanted to know... this is at Wannado City Ft. Lauderdale at Sawgrass Mills Mall.

I would appreciate any bit of advice on what I could do here.

I also disconnected the lcd and plugged it back in, but the same problem presisted. I figure either the MP is bad, or the software got screwed up somehow. Thanks guys.

[acjourneyman]

You need to reload the configuration on that ch531, if it does not take it than you need a new one.I have changed a few that got scrambled.

[jayguy]

i believe that the error message means:

A touch was detected during boot indicating the user wanted to stay in boot mode. This mode can be used to recover from a fatal software error in the application code. Cycle power on the MP to clear this error if it was unintentional.

but i found this on a different model chiller diagnostics manual, not a screw chiller

on the low liquid level sensor...you had a low liquid level in the evaporator of below -0.8" for 80 continous seconds. you may be low on refrigerant or you may have a exv that is not working, etc.

basically, not enough refrigerant in the evap.

would help if we knew the model number

[AFatalo86]

I will post the model # in a few hours when I get to work. It is not a 531 it is a 530. So far thanks for the advice... I'm going to look in, but keep the tips on rolling.

[mallron]

Forgive me for being rude, but

AFatalo86- you're not an A/C guy and if you are then you don't have much experience with chillers and commericial applications.


I would say it is a medium sized system, becuase I have seen a bigger Trane system.

What in the world does that mean?


In order to help we are gonna need to get rather technical info from you and give technical info in return. Judging by your first post, I don't see that working. Would it be possible for you to call your local TRANE office or some other reputable commercial contractor?

-JB

[jimbob73]

I have now noticed on the Chiller #2 LCD that there is something that says "limit" next to the Circuit 2 and Compressor 2... I looked further into it and it says the blatant "low liquid level.
Both Compressors are running well and it is cooling off the park, however it is not balancing between the two chillers, becuase only one is running. I now have chiller 2 running the whole park. Incase you wanted to know... this is at Wannado City Ft. Lauderdale at Sawgrass Mills Mall.



What I gather out of this statement is that Circuit 2 capacity is being limited due to low liquid level in the evaporator. CH530 is a full featured control that will try to keep a unit online if there is a problem by automatically adjusting operation to prevent a complete shutdown. CH530 took notice of the situation and is trying to resolve it by preventing the compressor from loading up any further. The EXV at this point should be 100% open trying to bring liquid level in the evaporator back up. If there was a low liquid level problem and the operation was not limited, Then compressor/circuit would shut down due to low evap refrigerant temp. So in other words, Both compressors may be running, BUT NOT WELL. If this is a constant problem, It needs to be looked at and resolved.

[Healey Nut]

I"m with mallron on this one .