Mark V TMR system is installed on our site for Frame V gas turbines. Mark V was initially configured with <I> but in 2008 <I> was upgraded to HMI. Two gas turbines are installed at our site and each gas turbine has its own HMI in the GT compartment and we have one HMI in the control room for both the gas turbines for displaying data. The fuel used for the gas turbine is Natural Gas.
Both gas turbines are running and their last maintenance was done in Jan 2015. On the morning of Oct 30 2015 it was reported that the some exhaust thermocouples are showing bad readings on HMI. We rushed to the control room. When we checked the status of R core it was in A8 status. Can anyone explain what is A8 status? Why R core went into A8 when it was running in A7 status since January?
We restarted the R core from <PD> core. It booted up successfully and attained A7 status. Just after one day it is showing the DCC error(DCC Bad eeprom table checksum). Can anyone explain this error? Can we relate this to A8 status of the R core? Can we expect rebooting or any other problem in R core?
In help HELP_QD.BAT file i have found the following details<pre>
0035 ;DCC BAD EEPROM TABLE CHECKSUM
CAUSE A bad checksum was detected for the EEPROM.
EFFECT Core powers up in default mode with control function disabled.
ACTION Check from <I> as to which EEPROM table has the bad checksum and download correct table.</pre>
What is meant by Mode Control function disabled?? And when will this EFFECT take place? On re-booting?
ADDITIONAL INFORMATION:
About 125VDC: It is grounder. There is some problem in batteries. Hopefully these batteries will be replaced in next shutdown.
TCPS card of S core was replaced due to rebooting problem of S core. This was done in Feb 2015.
Both gas turbines are running and their last maintenance was done in Jan 2015. On the morning of Oct 30 2015 it was reported that the some exhaust thermocouples are showing bad readings on HMI. We rushed to the control room. When we checked the status of R core it was in A8 status. Can anyone explain what is A8 status? Why R core went into A8 when it was running in A7 status since January?
We restarted the R core from <PD> core. It booted up successfully and attained A7 status. Just after one day it is showing the DCC error(DCC Bad eeprom table checksum). Can anyone explain this error? Can we relate this to A8 status of the R core? Can we expect rebooting or any other problem in R core?
In help HELP_QD.BAT file i have found the following details<pre>
0035 ;DCC BAD EEPROM TABLE CHECKSUM
CAUSE A bad checksum was detected for the EEPROM.
EFFECT Core powers up in default mode with control function disabled.
ACTION Check from <I> as to which EEPROM table has the bad checksum and download correct table.</pre>
What is meant by Mode Control function disabled?? And when will this EFFECT take place? On re-booting?
ADDITIONAL INFORMATION:
About 125VDC: It is grounder. There is some problem in batteries. Hopefully these batteries will be replaced in next shutdown.
TCPS card of S core was replaced due to rebooting problem of S core. This was done in Feb 2015.