1. J

    Unit trips at PMX to LL xfer during almost every shutdown

    Our 9E DLN1 unit trips at PMX to LL xfer during almost every shutdown. We have CTXF thermocouples installed in crossfire tubes and a logic that trips the unit if one of them senses temperature higher than CTDA + 32 DegC for about a minute, or if one of them senses overranged temperature - above...
  2. J

    Mixed Fuel Mode Operation

    Hello, We have several Frame 9E units. Sometimes we're tripping at Gas-to-Liquid changeover, which we perform once per week or two. Usually, the problem is fuel pipes and other volumes not completely filled with liquid fuel. By slowing rate of changeover from 30 sec to 5-10 times more...
  3. J

    MKV <P> Output Logic Forcing

    Hello, Need to create a Push Button for a signal that comes out of Protection Module of MK-V ( L20GF2X , Pneumatic Gas Stop Valve ). Usually, we force it from the Logic Forcing Display, and we have to force L4_XTP in advance to make it possible. I want to create a Push Button on the screen...
  4. J

    Failing MKV Controllers

    Two, <R> and <S>, controllers of MKV system failed simultaneously at base load. At SOE first alarm was low hydraulic oil pressure, all standby and DC motors started.Trend showed 2/3 TTXD's were down for 1 minute. No additional process alarms prior to the trip. In diagnostic alarms only "power...
  5. J

    Liquid Fuel Bypass Valve Oscillation

    Hello Control Guys! In our 9E / MKV machine when loading 20MW and up Liq.Bypass valve starts oscillate while control signal is stable. I looked over very useful threads about MOOG valves, Bypass valve check etc., but I still have a problem to solve at my site. In addition to the written...
  6. J

    9E Trip at Shutdown

    Hi all, After giving a STOP command turbine is when trying to transfer from PREMIX to LEAN-LEAN with FAILURE TO REIGNITE PRIMARY ZONE. It happens only at Shutdown sequence. at Startup and Premix Transfer we have no warnings/alarms. Gas fuel pressure/Air pressure/Igniters are OK. We have some...
  7. J

    MKV Controller Went Back to A3 State

    Hello all! In our GE F9e TCS one of the MKV controllers went to A3 state. Reset from PD panel didn't help - the controller stays at -INIT- step. Manual says it may be 80186 processor not communicating. Several months ago i've changed DCC and LCC cards of this very controller. Any...
  8. J

    Clogged Pipes on 9F DLN1 Dual Fuel Units

    Hello, We have 9F DLN1 dual fuel units - 20+ years old. Mostly running on gas, but we have to exercise them on liquid fuel periodically. Many times liquid fuel pipes running from splitter found clogged with sludge and also a number of check valves always found stuck. Is there any...
  9. J

    Static/Dinamic servo calibration

    My SVO3 in TMR MKV GT has a constant feedback difference of 4-5% from a reference signal. Both LVDT's are pretty close at all channels but when trying to run Autocalib i get a message "Not reach 50% +sat. more then 5 sec". I was thinking about electronic Null Bias adjustment, but dropped the...
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