Recent content by ControlsFE521

Good checks. What about the flame scanners? Are the primaries showing 0 flame during the transfer or are they flickering? Also the gas valve demand vs feedback during the transfer? TTRF1 is slow to increase so maybe something holding the fuel back.

Could the transfer purge valves be leaking by? Not the actuators but the valves themselves? Also, the SRV actuators are known to get a flat spot in actuation that causes them to "stick" when moving very slowly if they haven't been serviced, usually caused by the dither setting in the servo...

For the 8.0GB issue, have you tried to partition the new drive to have separate drives with a max size of 8.0GB? That should solve your problem. For the cloning of software for all 3 units, I would expect it to work just fine after you change the IO_ports.dat to assign the HMI. That should...

You should get someone to come to site to help troubleshoot this. Give AP4 a call.

On the HMI, pull up a command prompt. type this: net start tci Press Enter If it says “TCI is already running,” reboot the HMI. If it says “Starting TCI,” go back to the HMI and see if the boxes fill in.

Your best bet is to find the drawings that show the circuits for the ETDs and PTRs. They will include all the terminals and devices in the circuit on both positive and negative sides. I don’t have steam turbine drawings in front of me, sorry.

You need to trace down the circuit on the positive side of the trip circuit. There is something in the circuit that is not CLOSED or MADE all the way. The low voltage on the positive side tells you it is on that side of the trip circuit. check for 65vdc at each interlock upstream of the PTBA...

Did you try rebooting the controller again? Either way I would suggest reboot all RST, XYZ and Go Slow. Shutdown all controllers and wait 30sec+. Power on R, wait for CPU to chime(beep) Power on S, wait for chime(beep) Power on T, wait for chime(beep) Power on XYZ. wait for screens on HMI to...

It depends. Do you have the UCVE’s that allow you to remove the batteries? If you do you can just remove and replace them. The early revisions of that Unit Controller had the batteries soldered in and you have to unsolder them to test. Best to send them into GTC and have the batteries replaced...

The battery in your Unit Controller (UCVE) is dead and needs to be replaced.

Having an issue at specific MW loading should help to diagnose. Take note of the VIGV position at those loads. When you performed the VIGV calibration, did you check the response of the VIGVs at the position for each load point (70MW and 35MW)? I wonder if there is something getting hung up...

I'm pretty sure there is a TIL out (forget the number) that also should trip the unit if the SRV goes too far open during startup like yours did. If whatever was causing the restriction upstream broke loose during the startup with the SRV at 100%, there will be damage.

What are your IGV's doing when FSRT is taking over? Are they supposed to open so that the exhaust temps go down?

Did you have an exhaust TC going high on both startups? Sounds like a short or cold junction in an exhaust TC.

Make sure when you rebuild the actuator you are using the high temp O-rings. The actuator manufacturer will send you the standard temp unless you request the high temp that they also have available. Also, we rotated the actuators away from the (turbine) wrapper to allow for less radiant heat on...