Trane Chiller Manuals Rtaa
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We suggest not registering using an AT&T, BellSouth, AOL or Yahoo email address. If you have any problems with the registration process or your account login, please. Does anybody know why I keep getting a diagnostic of ' entering water colder than leaving water temp. This is a manual reset safety shutting this chiller down.
There are two chillers total on this air house they stage up depending on building return water temperature. They also swap lead chiller aprox. Can not pinpoint problem. System has KMC controls and chilled water pump is engaged 8 mins. Befor chiller is turned on. I checked sensors ( entering / leaving water ) both look good.
After chiller is reset it comes up and runs fine until its checked next morning. Any suggestions? It is likely that the timing of the 'call for cooling' and opening the water valve (i am assuming that you have one) when you 'stage up or down' to this chiller (it is a transition thing).
When the problem chiller is 'off' the water in the barrel is warm.approximately room temp, maybe a little lower but definitely warmer than the chiller water loop. When you decide to turn on this problem chiller, you open the chilled water valve, you flood the 'entering water temp' sensor with cold chilled water. To the chiller, this is reverse flow (entering chilled water is colder than leaving chilled water). Depending on your gpm, you may need a longer period of time after opening your chilled water valve but before calling for the chiller to run.
My suggestion is to start your other chiller and get it running. Then open your chilled water valve to the problem chiller but do not let it start.
Time how long it takes before the leaving chilled water temp is at or above the entering chiller water temp. Then maybe add 2 minutes, just to be safe. Program this sequence into your controls: open valve, wait 'X' minutes, call for chiller to run. This should take care of your problem.
It would not seem like it should take that long to have the leaving chilled water to get to the entering chilled water temp. However, the entire shell of the barrel is at room temp as well as both refrigerant circuits tubing, and both circuits refrigerant that was left over, etc. The entering chilled water is attempting to cool all of that material and it does take time. I have one of these wonderful screamers on a low flat 24/7 load, where it cycles off once or twice a day sometimes.
Trane Rtaa Chiller Manuals Troubleshooting
The original 'should work' settings were just too close of a differential. Couple that with some slam bam PID control settings on the AHU's and I had the alarm you describe happen occasionally. When all the engineers went home, I spread out the on off differential to 5 degrees, tuned the PIDs on the AHU's, and it hasn't happened since.
If you get this while running, then a check of sensor resistance is in order. Quick Navigation. Site Areas. Forums.
Among the many troublesome failures I have encountered, the Trane Chiller RTWA and RTAA have this in common, 'Latched Fault, Manual Reset Required.' Aggrevations by the dozen.
I have cleaned the anti lock on the contactors and readjusted them countless times. And, just when you think you have it licked, there it is again. Another machine fixed itself. Got the latched fault for 3 months and it finally quit.
Who knows when the gremlin will return. Not happy with tech support, fix it better myself. Any thoughts?????????????????????????????????? I ma having a similar problem I have a RTAA 80 ton trane chiller that keeps shouting down on Latched Fault, Manual Reset Required, that is it no word as to which latch faulted. Tech support has replaced two condenser fan motors and two contactors and still has the problem. The only thing I found on the subject is in a manual that I got off the net, manual # RTAA-SVX01A-EN. 1 ) chilled water flow: causes to trip this diagnostic include either a loss of chilled water flow or a calibration shift in they evap.
2 ) Contactor CPRSR A: A; a welded cprsr contactor B; Detected a welded compressor Contactor when the compressor is command off but the current does not go to zero. The detection time shill be 5 sec. Minimum and 10 sec. 3 ) Emergency Stop; E- Stop input is open an external interlock tripped. Time to trip from input opening to unit stop is 0.1 to 1 sec. 4 ) Communication loss; A communication loss between modules 1U1 and 1U3 and or 1U3 and 1U1. A loss of IPC comm.
From the 1U3 module. Among the many troublesome failures I have encountered, the Trane Chiller RTWA and RTAA have this in common, 'Latched Fault, Manual Reset Required.' Aggrevations by the dozen. I have cleaned the anti lock on the contactors and readjusted them countless times. And, just when you think you have it licked, there it is again. Another machine fixed itself. Got the latched fault for 3 months and it finally quit.
Who knows when the gremlin will return. Not happy with tech support, fix it better myself. Any thoughts??????????????????????????????????hi jw Expand the latched fault by using chiller adaptive control. First specify the fault code. “LATCHED” is not a fault code. Latched means LOCKOUT.