Siemens SINAMICS PERFECT HARMONY GH180 Function Manual page 287

12.The drive then waits for cell diagnostics to complete. If a cell is faulted, pre-charge waits for
a fault reset. The fault reset only acknowledges the fault and cell diagnostics exits so that
precharge can continue. Any faulted cells will be bypassed on exit if bypass is enabled.
Note
Cell Faults
A detected cell fault will display on the keypad. No other indication is given that a reset is
required.
The drive trips if any of the following conditions occur:
• overvoltage fault
• cell under-voltage fault
• input protection fault
• pre-charge is aborted
• MV falls below 60%, as read through the input attenuators.
The drive waits until the cell fault is reset.
Note
Fatal Fault SOP Flag
Any cell fault is a fatal fault and will set the FatalFault_I SOP flag.
Do not use this flag to:
• remove the pre-charge enable flag, StartCellPrecharge_O
• set the MainInputVoltageDisable_O flag
Doing so during pre-charge will abort pre-charge with a pre-charge fault.
NXGPro+ Control Manual
Operating Manual, A5E50491925A
Advanced Operating Functions
8.17 Synchronous Transfer
285