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Do you have any history on the Exhaust Press. drop? When did this increase happen, was it sudden or progressive? Has there been any boiler or exhaust maintenance been done recently? Has anyone done any visual or boroscope loo to see if there is any simple obstruction?

Pretty well I reckon your machine needed purged somewhere. I reckon if you had tried a few more liquid starts, you would have got it away.

All these GE names do have "Longnames" associated with them, TTXM is originally Turbine Temp. Exhaust Median. You have a High Exhaust Temp. Alarm followed by Trip, you have a High Spread Alarm followed by a Trip. Control systems are usually designed to not give useless or confusing...

What is the ratchet plate?

Simply the answer is it won't work. This a Staged combustion system which goes through various combustion configurations dependent on calculated combustion Temperature TTRF. This will give best stability and lowest NOX through the load/unload range. Try using the search box in the top right...

Usually (but not always) P&IDs will show the On Base functions and connections for Process Instrumentation. Loop Diagrams will show the complete "loop" all the way back to Control System with all the interposing connections.

How do think you get Light Off? Have you had a look at the Cooling and Sealing Air & IGV P&IDs?

As has been said to you, if you have the machine manuals, you could fairly quickly develop a maintenance plan from the machine maintenance manuals. This would give you something to show management and see where it goes.

Read your drawings Logic "1" & "0"

I've tried to find a link to this document on any GE site but nothing. If you have, can you post a link to it?

Are you seriously telling us that you over excite a 480V Gen to 600V and now wonder why it isn't working?

To CSA & others Our Emails crossed but it just shows how confusing this subject is. I have absolutely no problem with and totally agree with CSAs last comments on cold start on machines and have done the same myself in over 40 years of playing around with GE turbines. Sorry to the first...

Further to my and CSAs comments, I have had a look at GER-3620N(10/17) Heavy Duty Gas Turbine Operational & Maintenance Considerations (you can download this document from the GE site). In Appendix F of this document they give minimum Turning Gear/Ratchet times for turbines in different...

I have certainly never seen any GE recommendation for how long that you can keep a machine on Cooldown. For sure there advisories on when a machine can be removed from cooldown and for how long a machine should be put on cooldown before restart. If anyone else has GE supplied information, please...

I told you already on my previous Email. Increase the Liquid Fuel LP supply pressure by 0.5 - 1.0 Bar and try again. There should be a PCV for this in your off base skid.

If your load is falling when you switch to diesel, check your diesel LP supply pressure. That is usually the problem. Try to increase by 0.5 - 1.0 Bar and try the changeover again. If it helps, you should be able to figure out by how much you need change the pressure to get a smooth transfer.

Well if the machine is under construction now is your chance to learn. Get together with the Commissioning Engineers and ask if you can see the system flow diagrams (P&ID), Control Specification and GE manuals if they are already on site. Follow these guys around and follow how they are...

Your GE Maintenance manual gives recommendations for maintenance of general instruments like Pressure Regulating Valves or maybe you have an in company policy for the same. For me Predictive maintenance is better for evaluating the operation of the L.O. system. Is the Turbine Bearing Header...

A question, does this only happen when you are running in ISOCH?

Do you have a prevailing wind direction? Would it be possible to build some kind of screen around the filter intakes? What kind of size is the debris? Can the soot not be pulsed back off the filters? Any photos, can you upload to [email protected].