Event E013
Qualified person
Event message:
Detected Abnormal Battery Group Contactor Variation in Battery Stack
Explanation:
The system has detected that the actual feedback status (return signal) of the DC contactor does not match the expected status in the current operating mode.
Example
It should be closed during operation, but the feedback indicates that it is open. Or it should be open during a disturbance, but the feedback indicates that it is closed.
This discrepancy causes the system to enter an error state.
Corrective measures:
Check the actual physical state (open or closed) of the contactor on site to determine if it matches the feedback signal. This makes it possible to determine whether the issue is due to a physical state or a signal detection error.
If the physical state does not match the feedback signal, first check the auxiliary feedback contacts and their cabling for anomalies.
If the physical state does match the feedback signal but contradicts the system command, focus on checking the control circuit or communication cables (e.g., CAN bus) for disturbances or interruptions.
Once you have resolved all wiring problems, try again to execute a state transition command (e.g., "Start" or "Stop") via the system. Observe whether the contactor is functioning correctly and whether the feedback is back to normal.
Once the contactor executes the command correctly and the feedback signal matches the expected state, the error is automatically corrected.