Diagnostics Faults - Nuvation Energy NUVSSG-1250-100 Product Manual

stack_fault_contactor_feedback_fail
▪
Fault that is generated when there is a mismatch between the contactor state and the
contactor feedback signal provided. Note that the feedback is provided through a GPI.
sc_fault_pi_interlock
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Fault that is generated when the interlock function of the Stack Switchgear unit's internal
Power Interface module has been activated. In the Stack Switchgear unit, this is connected to
fuse indicator switches on the main fuses. This fault should only occur if the main fuses have
blown.

The Stack Switchgear unit's e-stop circuit is unrelated to this interlock.
sc_fault_fault_pilot_state_mismatch
▪
Fault that is generated when the fault pilot state set by the Stack Switchgear unit's internal
Stack Controller module does not match the detected state on the Stack Switchgear unit's
internal Power Interface module
10.1.6.1. Initialization Issues
All of these faults are dependent on the stack bus communication between the Stack Switchgear
unit's internal Stack Controller and Power Interface modules The following table summarizes these
initialization issues:
Fault
sc_fault_pi_interlock
sc_fault_fault_pilot_state_mismatch
stack_fault_coil_fail
stack_fault_contactor_feedback_fail
* Note that these faults may occur if the Stack Switchgear configuration file is incorrectly modified.
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10.1.7. Diagnostics Faults

stack_fault_cell_open_wire
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Fault indicating there is an open wire on an installed cell channel
▪
This can also trip due to misconfigured or incorrectly installed cells
stack_warn_cell_open_wire
▪
Warning triggering on the same data as stack_fault_cell_open_wire
stack_fault_therm_circuit_fail
▪
Fault indicating there is a circuit failure on a thermistor channel on a Cell Interface
▪
This can also trip due to misconfigured or incorrectly installed thermistors
Document ID: NE-PM-003
Nuvation Energy High-Voltage BMS - Product Manual
Initialization Issues
Stack Bus failure
Stack Bus failure
Stack Switchgear unit's internal Power Interface module's AFE disabled*
GPI not configured*
Stack Switchgear unit's internal Power Interface module's AFE disabled*
Stack Bus failure
for a valid configuration file for the Stack Switchgear.
87 Rev 1.2, 2021-03-03
Curie Update 1