Quantum DXi6902, Field Service Manual, Page: 204 / 242

Chapter 3: DXi6902 FRU Removal and Replacement Procedures
Replacing an Array Module BBU
180 Quantum DXi6902 User’s Guide
Figure 111 Checking Array
Module BBU Status
4 Locate the controller with the failed BBU on the back of the Array
module by viewing the Service Action LEDs (see Figure 112 ).
• Service Action Required - This LED is lit when the component
has failed, but it is not yet in a state to be replaced.
• Service Action Allowed - This LED is lit when the component
has failed and is ready to be replaced.