Controller ESM LED Indicators

Three LEDs represent the status of each energy storage module (ESM). The LEDs are above the release button of each drive.

Figure: 1 Controller drive LEDs

Legend

1 Ready to Remove LED
2 Attention Service Required LED
3 OK/Activity LED

This following table describes the functionality of the ESM LEDs:

Table 1 Controller ESM LED status and description
Location	Name	Color	Status and meaning
Top	Ready to Remove	Blue	On – ESM can be removed as a hot-swap operation. Off – Do not remove the ESM. Flashing – ESM is initializing.
Middle	Attention Service Required	Amber	On – Normal fault is detected. Off – No faults are detected. Flashing – No function.
Bottom	OK/Activity	Green	On – ESM is functional without fault. Off – ESM is off or initializing. Flashing – ESM read and write activity.