RTAA High Oil Temperature

[Eastcoastchiller]

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?

[Southern Mech]

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%

[R123]

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?

[Southern Mech]

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.

[Southern Mech]

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.

[R123]

It's very unusual for a slide valve to stick on these GP compressors.

[Healey Nut]

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 ???