Event E129
Qualified person
Event message:
Anomaly in Battery Pack #X Contactor
Explanation:
The system has detected that the actual feedback status of the DC contactor for the battery module X# does not match the status expected by the system based on the current operating mode. For example, the system command is "close" but the feedback is "open," or the command is "open" but the feedback is "close". This deviation leads to the disconnection of the affected module and triggers a system error state.
Corrective measures:
Check the actual physical state (on/off) of the DC contactor on the enclosure of the affected battery module and compare this with the feedback signal displayed in the system.
If the physical state does not match the feedback signal, first check whether the auxiliary feedback contacts and their cabling are functioning correctly.
If the physical state matches the feedback signal but does not correspond to the system command, first check the control circuit and communication cables (e.g. CAN bus) for disturbances or interruptions.
After resolving any cabling issues, try executing a status change command (e.g. "Start" or "Disconnection") on the system again and observe whether the function of the contactor and the feedback return to normal.
Once the contactor executes the command correctly and the feedback signal matches the expected state, the error is automatically reset.