J
Good Evening,
The other day we experienced a unit trip with fault code 379 & 728 on the EX2000. During operation we were islanded from the grid and one unit was in ISOCH and the other was in L/S. The unit in L/S then tripped after a few hours of operation like this. Fault codes that we found on the unit were 379 and 728. The description mentions 379 as UCP_WDOG DCP/UCC Watchdog Time Out and 728 as Offline Trip. According to the descriptions it seems like it was either a loose 2PL/3PL, a problem with the DCFB or TCCB or a low voltage on 5V.
To me it seems very unlikely that this problem would present itself during an islanding scenario and not any other time during unit operation. I don't want to rule out a bad board or loose cable. After inspection of the unit and cables we reset the fault (hard reset) and spinning the unit up to full speed the exciter came on fine with no errors. We did not close the unit breaker and won't until we feel comfortable with the EX2000.
Thanks!
The other day we experienced a unit trip with fault code 379 & 728 on the EX2000. During operation we were islanded from the grid and one unit was in ISOCH and the other was in L/S. The unit in L/S then tripped after a few hours of operation like this. Fault codes that we found on the unit were 379 and 728. The description mentions 379 as UCP_WDOG DCP/UCC Watchdog Time Out and 728 as Offline Trip. According to the descriptions it seems like it was either a loose 2PL/3PL, a problem with the DCFB or TCCB or a low voltage on 5V.
To me it seems very unlikely that this problem would present itself during an islanding scenario and not any other time during unit operation. I don't want to rule out a bad board or loose cable. After inspection of the unit and cables we reset the fault (hard reset) and spinning the unit up to full speed the exciter came on fine with no errors. We did not close the unit breaker and won't until we feel comfortable with the EX2000.
Thanks!