SDCREL_a018 — Historical Pyro Trigger

Full alert identifier: SDCREL_a018_historicalPyroTrigger

Alert description

Secondary disconnect controller (SDC) triggered the 2-phase disconnect mechanism during a previous power ON state. Alert log signal data retrieved from electrically erasable programmable read-only memory (EEPROM) to be used for pyro disconnect trigger investigation afterward.

Potential impact

Drive unit may not be functional due to previous pyro disconnect.

Set condition

SDC reads alert log signal data from EEPROM for a previous pyro disconnect event.

Clear condition

SDC Power-ON self-test is successful.

Signals to check

These diagnostic fields are associated with SDCREL_a018. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
HV Backup Supply V `SDCREL_a018_HVBackupSupplyV`	V
Boost Rail V `SDCREL_a018_boostRailV`	V
Di Uart MIA `SDCREL_a018_diUartMIA`	—
Fault Currents Detected `SDCREL_a018_faultCurrentsDetected`	—
Hv Power Good `SDCREL_a018_hvPowerGood`	—
Hv Power Not Good Qualified `SDCREL_a018_hvPowerNotGoodQualified`	—
Hvbkup P Good Pin `SDCREL_a018_hvbkupPGoodPin`	—
Max Abs Speed `SDCREL_a018_maxAbsSpeed`	Hz

Show 8 more fields

Signal	Unit
Pm Running Pin `SDCREL_a018_pmRunningPin`	—
Pyro Armed `SDCREL_a018_pyroArmed`	—
Speed From Voltage `SDCREL_a018_speedFromVoltage`	—
Speed Valid `SDCREL_a018_speedValid`	—
Trigger Reason Fault Currents `SDCREL_a018_triggerReason_faultCurrents`	—
Trigger Reason High Back EMF `SDCREL_a018_triggerReason_highBackEMF`	—
Trigger Reason Hv Bad At Speed `SDCREL_a018_triggerReason_hvBadAtSpeed`	—
V Bat `SDCREL_a018_vBat`	V

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of SDCREL_a018.