Batteries will go into Hibernate if they are stuck in Bootloader for ~15 minutes. The BBs will need to be woken up before they can be recovered from Bootloader.
Symptoms:
Loss of communication with one or more Battery Blocks.
Troubleshooting Steps:
Check that the Trunk Harness is connected properly.
Follow any instructions provided within the Install App.
Check Grafana to ascertain if the BBs have ever communicated.
If Never Communicated:
Attempt to wake from Hibernate with a power cycle (see article 99.3 Power Cycle Lunar Battery Block).
Attempt to wake from Hibernate through Gridshare: Go to the Gridshare devices page for the INV → Click Remote Actions tab → Select "Wake DCDCs from Hibernate" and click Submit.
Attempt to wake from Hibernate (Remote FW): TSE and T3 team can remotely wake the BB using SYSGUI. If communications are still not established, push a FW update. If communications remain absent, unplug Bridge low voltage comms, wait 30 seconds, then power cycle the BB.
If still no comms, escalation is required.
If Previously Communicated:
Check the DCDC Fault Matrix on Grafana to identify any raised faults.
If the BB disappeared after a FW upgrade, there is a high probability it is stuck in the Bootloader. This requires escalation; ping the FW team for support.