12v Power Supply Fault (P0A05)

This fault is triggered when the voltage measured by the BMS drops below approximately 9v for 5 to 8 seconds. This code remains set even after the voltage has returned to normal.

Resolving the issue:

Step 1) Ensure that the 12v supply to the BMS remains above 9v (note: revision D and newer units can withstand significant voltage transients and brownouts without interruption while earlier revisions are more susceptible to interruptions.)

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