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  1. ali arsalan

    GE Frame9e tripping during ramp down at around 2000 to 2300 RPM.

    Thanks for such great responses. Well we have already verified the P2 related transmitters and all are normal. I would like to ask you do we still need to put the new null bias value since it has not been saved after last servo replacement. secondly what other things do you suggest. do you...
  2. ali arsalan

    GE Frame9e tripping during ramp down at around 2000 to 2300 RPM.

    I am sorry it was a typo error null bias value was found 1.95. Plz suggest accordingly. Extremely appologetic
  3. ali arsalan

    GE Frame9e tripping during ramp down at around 2000 to 2300 RPM.

    Null bias value 1.95 not 19.5
  4. ali arsalan

    GE Frame9e tripping during ramp down at around 2000 to 2300 RPM.

    Your replies will be highly helpful. Thanks alot
  5. ali arsalan

    GE Frame9e tripping during ramp down at around 2000 to 2300 RPM.

    P3 pressure is stable. P2 starts hunting when srv starts hunting. Fb error is mostly on the above side of command. For example if command is 15 fb is 15.5. That might be the reason we got a null bias of less value that is 19.5 Regarding shut down for 8 to 10 month I meant to say 8 to 10 months...
  6. ali arsalan

    GE Frame9e tripping during ramp down at around 2000 to 2300 RPM.

    Regarding your GCV question, gcv is coming down normally as you can see in the trends but when srv starts fluctuating gcv keep on standing at 11%, but as per the history previously normal shutdowns were a routine. No cmnd fb error of gcv found, can ne scene in the trends
  7. ali arsalan

    GE Frame9e tripping during ramp down at around 2000 to 2300 RPM.

    Please tell us if this problem just started, OR if it started after a "calibration" of LVDTs (SRV and/or GCV)???? The problem has started without any calibration. Does the machine normally run on natural gas fuel? Yes Does it normally shut down without problems when running on natural gas fuel...
  8. ali arsalan

    GE Frame9e tripping during ramp down at around 2000 to 2300 RPM.

    GE Frame9e tripping during ramp down at around 2000 to 2300 RPM. while coasting down on these RPMs SRV fluctuations between command and feedback seems obvious and difference between command and feedback become around 0.5 to 0.8%. P2 pressure also tries to maintain, due to completion of 8 minutes...
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