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While starting our gas turbine (PG-6541) I've noticed that in combined cycle mode purge is completed in 8 minutes and in simple cycle mode purge completed in 5 minutes. however, it should be 13 minutes for CC mode and 8 minutes for SC mode.
I've studied the Elementary diagram of 'purge start' and 'purge complete' sequence and found the timer 'L2TVBB' software timer for 'Combined mode' and 'L2TVSC' software timer for 'Simple mode'. I've noticed that at rung display the timer 'L2TVBB' have the setting 7 minutes and 'L2TVSC' have the setting 4 minutes.
I've studied the literature to modify the timer setting, but that was not so helpful for me.
** it says:
1. Go to the 'Control Constant' (1D)
2. then select the specific timer
3. then select 'Adjust'
4. then write the 5 digit password
5. then write the three digit initial
here, (1 to 4) is understandable, but no.5 (three digit initial) is not understandable for me.
Please, help me modifying the timer setting so that i can set the time 12 minutes at 'L2TVBB' and 7 minutes at 'L2TVSC'.
I've studied the Elementary diagram of 'purge start' and 'purge complete' sequence and found the timer 'L2TVBB' software timer for 'Combined mode' and 'L2TVSC' software timer for 'Simple mode'. I've noticed that at rung display the timer 'L2TVBB' have the setting 7 minutes and 'L2TVSC' have the setting 4 minutes.
I've studied the literature to modify the timer setting, but that was not so helpful for me.
** it says:
1. Go to the 'Control Constant' (1D)
2. then select the specific timer
3. then select 'Adjust'
4. then write the 5 digit password
5. then write the three digit initial
here, (1 to 4) is understandable, but no.5 (three digit initial) is not understandable for me.
Please, help me modifying the timer setting so that i can set the time 12 minutes at 'L2TVBB' and 7 minutes at 'L2TVSC'.