Trane RTAA125 Chiller

[jerrmey]

Has anyone had a problem with the compressor shutting down on low oil temp on Trane RTAA125 rotary air cooled chiller? If so what is causing this?

[goshen]

Hi
it would seem like either your oil temp sensor is faulty
or you have a more serious problem.
i would start by checking the oil sump temp when this error shows up,
and comparing it to the reading of the ucp2.
good luck

[CV_Geardrive]

Hi,
I suppose that you have a US RTAA unit with R22, UCM-CLD adaptive control and GP1 compressors. (CHHN)
In this case there is no Low Oil Temperature fault.
Faults relative to oil are:
1. Entering oil temperature sensor.
2. High oil temperature.
3. Low oil flow. (Applicable only in IS compressors. (CHHB))
4. Oil system fault.
Please check and let us know.
I have send to your email fault list relative to RTAA US units.
You can also search the internet for RTAA IOM4.
Regards,
CV

[serviceman]

adaptive control:

a. The differential oil pressure switch
remained open for more than
20 contiguous seconds on
Compressor A.

CLD DISPLAY:

The differential oil pressure switch remained opened for more
than 20 contiguous seconds on Cprsr A.
Note: Although GP cmprs do not have pressure switch or Oil
Line solenoid, this diagnostic is still active. The input must be
jumpered for normal operation on GP cmprs.

[serviceman]

sorry:

the condenser temperature difference between saturated and oil temperature can give an alarm on the compressor lubrication system should be set at -4 ° F