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Selva, If there is a problem with a input/output card of a Mark* turbine control system there will always be at least one Diagnostic Alarm to indicate the problem. Have you checked the VSVO Diagnostic Alarms, and if so, what Diagnostic Alarm(s) are being annunciated? A TMR (Triple Modular...

CUSTOMER TRIP is a kind of "catch-all" discrete input that allows Customers (purchasers of Mark* turbine control systems) to connect one OR MORE inputs to initiate a turbine trip. For example, let's say the Customer has a natural gas compressor and they want to trip the turbine if the natural...

otised is correct--it's not possible to increase steam production <i>over that which occurs at Base Load</i> without auxiliary firing of the HRSG. IGV Exhaust Temperature Control can be used to increase steam production <i>over that which would be available without using IGV Exhaust...

Mahesh, Do they (GE) not point you to the Mark V documentation? That would be the Mark V Maintenance Manual, GEH-5980, and GEH-6195, the Mark V Application Manual? You will find procedures for changing the DCC/SDCC cards in the Maintenance Manual. BUT, as has been covered many times...

IGV Exhaust Temperature Control can only be used when the unit is NOT operating at Base Load. (One of the definitions--the main one, actually--of Base Load is that the IGVs are at maximum operating angle.) If you select IGV Exhaust Temperature Control ON when the unit is at Base Load, nothing...

shaiideee, Using AutoCalibrate to attempt to correct improper valve response is ... ludicrous. AutoCalibrate ONLY affects the scaling of LVDT feedback. Full stop. Period. AutoCalibrate DOES NOT affect servo stability or gain or valve response. In fact, if there is a valve or actuator problem...

This bit of application code is associated with what GE alternately calls "MBC" (Model-Based Control), or ARES, or ETS (I forget what the last acronyms stand for). And all of that is considered <b>PROPRIETARY</b> information, and trade secrets, and Intellectual Property. Which means,"You don't...

Thank you very much for the feedback!

faustojasso, Do you or your company have a website we can go to for more information? How does your HMI display Process- and Diagnostic Alarms? Does your HMI require a GE HMI to serve as a gateway? Can Toolbox be loaded on your HMI and used for troubleshooting, LVDT calibration, DLN...

Low engine temp and loss of flame would indicate insufficient fuel flow to maintain flame. Dirty inlet filters would do the opposite--result in higher than normal engine temperatures. I'm not familiar with the control system for the Solar units, but if it monitors fuel flow-rates then you...

Max, I will ask to keep the discussion<b>S</b> on-line, as when they go off-line only one person gets to follow the discussion and learn from it. The beauty of control.com is that a LOT of people can follow the discussions and learn from the process and the resolution--something that...

Shyam,All, >We rectified the problem by replacing the servo valve with >new one. So, this is THE problem with saying "calibrate the valve" (or "calibrate the IGVs"). The implication is that AutoCalibrate does something to the servo-valve regulator in the Mark* (and it <b>DOES NOT</b>)...

Hold a charged battery in your hand without touching the terminals. Take a voltmeter and measure the voltage to ground (earth) from either terminal. It will usually start at a "high" voltage then decay to something NOT ZERO--could be very close to zero, but it will not be zero (0.000, or however...

Shyam, PRESUMPTIONS ____________ 1) When you inserted the feeler gauges you were sure that all the gap between the actuator (piston) rod and the valve stem was filled and there was no gap between the actuator (piston) rod and the valve stem. You used a piece of wood (approximately 1 metre...

Mohamedibr752, <pre> 2 L30FT_G2 2 L4DE ;ACCUM_18_MSW, ACCUM_18_LSW 2 L4HR ;ACCUM_19_MSW, ACCUM_19_LSW 2 LFALSE 2 LFALSE 2 LFALSE 2 LFALSE 2 LFALSE</pre> L4DE is usually the CDB signal name for the main diesel engine run...

Sunilak, So, were talking about the secondary flame detectors. I know some sites have drilled small holes in the secondary flame detector tube (the part that protrudes out of the back of the secondary fuel nozzle block) and piped a very small amount of compressor discharge air into the pipe...

joe45678, Thank you for the update! Keep us informed as you go, please!!!

mohamedibr752, I will help you to develop the procedure; but you're going to have to do the "heavy lifting" as follows. First you need to copy the contents of TOTT_Q.SRC to this thread. Use the pre HTML tag/prefix before the contents of the file, and the /pre HTML tage/suffix after the...

If this is a relatively new occurrence, not related to oil condition, it would seem that some input to the Mark V is out of calibration. One would need to look at the CSP (Control Sequence Program) to see what is preventing the commands from affecting the output to the servo. Unfortunately...

A single Diagnostic Alarm WILL NOT result in a turbine trip (on a TMR system). BUT, combinations of Diagnostic Alarms CAN and WILL result in turbine trips. That's why it's important to understand and resolve every Diagnostic Alarm--because combinations of Diagnostic Alarms CAN and WILL result in...