Alerts

Measured latched fault response does NOT match with expected request from DI

In the event of a sudden LV loss at speed, latched fault response may not match expectations, exposing drive unit to unexpected torque

All stator sensors are giving abnormal measurements

Drive unit enters unit limp mode (see DI_a126_limpMode)

Abnormal temperature measurements from stator sensor 1

Stator sensor 2 will be used instead (if available)

Stator temperature exceeds upper temperature threshold

No direct impact. Could damage drive unit if temperature is continuously too high.

Abnormal temperature measurements from DI coolant outlet sensor

Unable to monitor DI coolant outlet sensor temperature

DI coolant outlet temperature (refer to outletTemp) drops below lower temperature threshold

No direct impact. Could damage drive inverter if temperature is continuously too low.

DI coolant outlet temperature (refer to outletTemp) exceeds upper temperature threshold

No direct impact. Could damage drive inverter if temperature is continuously too high.

The Secondary Disconnect Controller (SDC) is not communicating to the Drive Inverter (DI), or there is a mismatch between their interface version.

The Secondary Disconnect Controller (SDC) may not be monitoring potential drive unit failures.

When HV bus is up, DI measured bus voltage very low or disagrees with BMS reported voltage

Drive unit enters unit limp mode (see DI_a126_limpMode), faults (Model 3 only)

HV bus voltage (refer to busVoltage) drops below lower voltage threshold (refer to busHighLimit)

Unable to produce torque/power from drive unit

HV bus voltage (refer to busVoltage) exceeds upper voltage theshold (refer to busHighLimit)

Unable to produce torque/power from drive unit

Imbalanced phase currents detected. See payload signals for reason of trigger

Drive unit enters unit limp mode (see DI_a126_limpMode)

The DIx Phase B current sensor is irrational. An irrational current may indicate a high rate of change or current measurement out of sensing bounds. There may be a condition affecting current input and output.

If the alert asserts at the beginning of a drive cycle, DIx may not enable. If the alert asserts during a drive cycle, DIx may be disabled. DIx may not function as expected.

The DIx Phase A current sensor is irrational. An irrational current may indicate a high rate of change or current measurement out of sensing bounds. There may be a condition affecting current input and output.

If the alert asserts at the beginning of a drive cycle, DIx may not enable. If the alert asserts during a drive cycle, DIx may be disabled. DIx may not function as expected.

The DIx ECU has detected the current sensor RMS current has exceeded the expected RMS threshold on Phase A.

DIx may not function as expected, including vehicle power being limited.

The DIx ECU has detected a peak in Phase C.

DIx may be inoperable.

The DIx ECU has detected the current sensor RMS current has exceeded the expected RMS threshold on Phase C.

DIx may not function as expected, including vehicle power being limited.

The DIx ECU has detected a peak in Phase B.

DIx may be inoperable.

The DIx ECU has detected a peak in Phase A.

DIx may be inoperable.

The FPGA detects a 5V supply regulator PGOOD is not working as expected.

Readings from 5V sensors may become erratic.