System B Disabled (Maintenance Mode) by Hardware A/B Switch
| Auto Switch Green | ||
|---|---|---|
| A | B | |
| Off | Select | Off |
| Green/Gray | Ready | Green/Yel |
| Green | Active | Off |
The yellow bezel of the Ready light indicates that maintenance personnel have disabled system B.
Action
To make system B ready for operation set the hardware switch to enable B (that is, to allow automatic switching).