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  1. #14
    Join Date
    Aug 2011
    Location
    Texas
    Posts
    3
    OKAY...changed all the solenoids, valves and previously the sensors. It's still tripping on 170 oil temp. It seems now that circuit will not back off. I think something is broken inside the slide valve. It is trying to back off the coil energizes and everything it just doesn't. The Serial # is U96J37008 and the model # is RTAA0804XH01A3D0BFK. All the fans are working and pulling normal amps, the UCM is responding normally it just seems to me that it is the slide valve. I worked it back and forth and saw the difference in pressure at the cavity schrader going from 60 to 200 psi and then to 150 then to 60 again. I tried to service pump down but it just ran and timed out. Third day on this. Is this slide valve something I should tackle, replace the compressor or call in the factory techs?

  2. #15
    Join Date
    Dec 2010
    Location
    Down by the river
    Posts
    1,664
    Quote Originally Posted by R123 View Post
    Everything your describing points to a female step loader that isn't energizing. When a circuit runs fully unloaded for an extended period of time, the oil temp will keep rising and the controller will energize the female step loader to drop the oil temp. You stated the circuit doesn't load/unload properly. When the circuit starts, it should pull about 40-45% RLA, then the female loader will step the current up to about 50-55% RLA, then the male unloader valve will modulate with infanate control. If you don't see that first "step" your female unloader isn't working. Also, check for magnetism at the coil with a pocket screwdriver to check if it's working electrically but the valve could be mechanically stuck.
    agree with the above 100%
    It's hard to stop a Trane. but I have made one helluva living keeping them going.

  3. #16
    Join Date
    Jul 2007
    Location
    The Hot South
    Posts
    1,333
    Quote Originally Posted by Eastcoastchiller View Post
    OKAY...changed all the solenoids, valves and previously the sensors. It's still tripping on 170 oil temp. It seems now that circuit will not back off. I think something is broken inside the slide valve. It is trying to back off the coil energizes and everything it just doesn't. The Serial # is U96J37008 and the model # is RTAA0804XH01A3D0BFK. All the fans are working and pulling normal amps, the UCM is responding normally it just seems to me that it is the slide valve. I worked it back and forth and saw the difference in pressure at the cavity schrader going from 60 to 200 psi and then to 150 then to 60 again. I tried to service pump down but it just ran and timed out. Third day on this. Is this slide valve something I should tackle, replace the compressor or call in the factory techs?
    When you worked it back and forth, did you see a change in amp draw corresponding to your pressure going from 60 to 200psi? Did you check the FEMALE step unloader as I described in my previous post?

  4. #17
    Join Date
    Dec 2010
    Location
    Down by the river
    Posts
    1,664
    you can also hook a manifold up and apply pressure to loaders and work them, if it does not load its stuck and the head has to come apart.
    It's hard to stop a Trane. but I have made one helluva living keeping them going.

  5. #18
    Join Date
    Dec 2010
    Location
    Down by the river
    Posts
    1,664
    Quote Originally Posted by Eastcoastchiller View Post
    OKAY...changed all the solenoids, valves and previously the sensors. It's still tripping on 170 oil temp. It seems now that circuit will not back off. I think something is broken inside the slide valve. It is trying to back off the coil energizes and everything it just doesn't. The Serial # is U96J37008 and the model # is RTAA0804XH01A3D0BFK. All the fans are working and pulling normal amps, the UCM is responding normally it just seems to me that it is the slide valve. I worked it back and forth and saw the difference in pressure at the cavity schrader going from 60 to 200 psi and then to 150 then to 60 again. I tried to service pump down but it just ran and timed out. Third day on this. Is this slide valve something I should tackle, replace the compressor or call in the factory techs?
    I would not tackle it w/o propper support, compressor replacement no, not needed, but it is a pretty food job, if it is in fact the slide valve I would get factory support, you can cause major damage if not done right.
    It's hard to stop a Trane. but I have made one helluva living keeping them going.

  6. #19
    Join Date
    Jul 2007
    Location
    The Hot South
    Posts
    1,333
    It's very unusual for a slide valve to stick on these GP compressors.

  7. #20
    Join Date
    Mar 2004
    Location
    ottawa canada
    Posts
    2,081
    Quote Originally Posted by Eastcoastchiller View Post
    OKAY...changed all the solenoids, valves and previously the sensors. It's still tripping on 170 oil temp. It seems now that circuit will not back off. I think something is broken inside the slide valve. It is trying to back off the coil energizes and everything it just doesn't. The Serial # is U96J37008 and the model # is RTAA0804XH01A3D0BFK. All the fans are working and pulling normal amps, the UCM is responding normally it just seems to me that it is the slide valve. I worked it back and forth and saw the difference in pressure at the cavity schrader going from 60 to 200 psi and then to 150 then to 60 again. I tried to service pump down but it just ran and timed out. Third day on this. Is this slide valve something I should tackle, replace the compressor or call in the factory techs?
    Did you pull out and toss the pill filters when you removed the solenoids ???
    The 64 roars to life Whoo hoo ...shes a rolling chassis .
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    Best Austin Healey In Show twice in 2013 .....All those hrs paid off .

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