Hello guys,
Yesterday we had a failure of VPRO ‘Z’ card on our GT-A. The Z card was completely offline despite power supply to it being normal. Reading the manual and the threads here at control.com, it was quite evident that there had been internal short-circuiting in the card and it was now to be replaced. Therefore, we arranged a new card from our inventory and replaced it (on the running turbine) as per the procedure given in GE Manual GEH-6421J Page 151. We ensured that the model of the new card was same as that of the old one. Everything went well, we ensured that jumper settings were same, powered on the new card, and downloaded the firmware and configuration in the new card. After download, we rebooted the card again and card successfully came back online with LEDs matching with jumper settings. However, the following diagnostic alarms still persist on the newly replaced Z card:
The manual says that this is an indication of failed ID chip on connector J2/J5/J6 or cable problem. I find it very hard to digest that all three cables are faulty at the same time. We have checked the cable connection on all these connectors and all the cables are properly connected with their locks engaged. The VPRO 'Z' card is online and synched with 'X' and 'Y' cards and everything else is fine except for these diagnostic alarms. There are no diagnostic alarms on 'R', 'S' and 'T' controllers or VCMI also. I tried downloading firmware/ configuration and rebooting again but situation is same. I would really appreciate the help of you guys to understand what is going on here. These ID failure suggests that VPRO 'Z' is not communicating with TREG and TPRO boards and this poses a serious threat to our turbine operation. I am attaching the screenshot of diagnostic alarms as well. Thanks in advance.
Yesterday we had a failure of VPRO ‘Z’ card on our GT-A. The Z card was completely offline despite power supply to it being normal. Reading the manual and the threads here at control.com, it was quite evident that there had been internal short-circuiting in the card and it was now to be replaced. Therefore, we arranged a new card from our inventory and replaced it (on the running turbine) as per the procedure given in GE Manual GEH-6421J Page 151. We ensured that the model of the new card was same as that of the old one. Everything went well, we ensured that jumper settings were same, powered on the new card, and downloaded the firmware and configuration in the new card. After download, we rebooted the card again and card successfully came back online with LEDs matching with jumper settings. However, the following diagnostic alarms still persist on the newly replaced Z card:
- Fault Code 21: P6 ID Failure
- Fault Code 20: P5 ID Failure
- Fault Code 18: P3 ID Failure
The manual says that this is an indication of failed ID chip on connector J2/J5/J6 or cable problem. I find it very hard to digest that all three cables are faulty at the same time. We have checked the cable connection on all these connectors and all the cables are properly connected with their locks engaged. The VPRO 'Z' card is online and synched with 'X' and 'Y' cards and everything else is fine except for these diagnostic alarms. There are no diagnostic alarms on 'R', 'S' and 'T' controllers or VCMI also. I tried downloading firmware/ configuration and rebooting again but situation is same. I would really appreciate the help of you guys to understand what is going on here. These ID failure suggests that VPRO 'Z' is not communicating with TREG and TPRO boards and this poses a serious threat to our turbine operation. I am attaching the screenshot of diagnostic alarms as well. Thanks in advance.
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