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The stack_fault_open_shunt and stack_fault_short_shunt can be uninitialized if the associated algorithms
are not enabled, the Stack Switchgear unit's internal Power Interface module's AFE is not enabled, or
there is Stack Bus communication errors. This is typically caused by incorrectly modifying the Stack
Switchgear factory configuration file. Contact
file for the Stack Switchgear.
10.1.8. Breaker Faults
stack_fault_breaker_tripped
▪
Fault that is triggered to indicate that the breaker has tripped (i.e. opened)
stack_fault_breaker_conflict
▪
Fault that is triggered to indicate that the breaker state differs from the expected state of the
breaker
10.1.8.1. Initialization Issues
Failure to initialize these faults is caused by an invalid configuration of the GPI(s) used to read the
breaker state. This is typically caused by incorrectly modifying the Stack Switchgear factory
configuration file. Contact
Switchgear.
10.1.9. Watchdog Faults
stack_fault_power_wdt
▪
Fault indicating stack voltage and current data has not been updated periodically
stack_fault_cell_wdt
▪
Fault indicating all cell data has not been updated periodically for every installed cell
stack_fault_therm_wdt
▪
Fault indicating all thermistor data has not been updated periodically for every installed
thermistor
stack_fault_ci_wdt
▪
Fault indicating Cell Interface data has not been updated periodically for every installed Cell
Interface
stack_fault_open_wire_wdt
▪
Fault indicating open wire scanning has not been occurring periodically when connected to the
DC bus
sc_fault_controller_wdt
▪
Fault indicating that an external controller to the battery management system was not
updating its watchdog timer (via the MESA heartbeat)
Document ID: NE-PM-003
support@nuvationenergy.com
support@nuvationenergy.com
Nuvation Energy High-Voltage BMS - Product Manual
for a valid configuration file for the Stack
89
for a valid configuration
Rev 1.2, 2021-03-03
Curie Update 1
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