We have gas turbine mk4 and we can't stop this turbine in normal case. Got a malfunction in one of the three sensors speed pickup in flow divider of controller <s>. for example, Can I make jumper to one of two good sensors or let him without connection (open circuit).

 

You need to jumper a good pick-up to <S>'s input after you disconnect the wires of the bad pick-up from <S>'s input. Be aware that while doing this if <R> or <T> loose their feedback while you are trying to jumper the signal over to <S>, the unit will likely trip anyway, probably because of exhaust over temperature.

The Mark IV terminal boards have these little test pins above each screw. After you disconnect the leads from <S>'s input, you can take a pair of test leads with small alligator clips on each end, clip one end of each lead to the test pins of <S>'s input, and then carefully connect the other end to the test pints of <R>'s or <T>'s input. Those little test pins can be very, very useful. While it goes without saying, just be careful.

Once you've done that, you will probably need to initiate a Master Reset to get <S> to clear all of the Process- and Diagnostic Alarms and get back to controlling liquid fuel flow in line with the other two control processors.

If you need to stop the turbine, there's always the red button on the door of the Mark IV control panel. The Emergency Stop Pushbutton. While it's not desirable, sometimes it the best thing to do.

 

Dear CSA
Thank you very much