PCS2REXA_a119 — Use Max Cap For Hv Impedance Estimation

Full alert identifier: PCS2REXA_a119_useMaxCapForHvImpedanceEstimation

Alert description

The Power Conversion System (PCS) detects the initial high voltage (HV) bus voltage is too high to measure capacitance, so it must rely on the maximum possible capacitance value instead for HV bus impedance estimation.

Potential impact

PCS may underestimate the HV bus impedance.

Set condition

The initial HV bus voltage is too high to measure capacitance, so PCS must use maximum possible capacitance value to estimate HV bus impedance.

Clear condition

The DCDC converter is commanded to shut down or receives a new request to precharge the HV bus.

Signals to check

These diagnostic fields are associated with PCS2REXA_a119. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
Present Hv Bus Voltage `PCS2REXA_a119_presentHvBusVoltage`	V
Present Lv Bus Voltage `PCS2REXA_a119_presentLvBusVoltage`	V
Start Up Hv Voltage `PCS2REXA_a119_startUpHvVoltage`	V

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of PCS2REXA_a119.