HPE Nimble Storage HF Series Hardware Manual page 103

Note: During PSU replacement, the array will run properly while powered with AC and DC power sources at the same
time.
Before you begin
Time required:
Parts required:
Information required:
Tools required:
Support contact:
HPE recommends using the Maintenance Window functionality within the HPE InfoSight portal to inform HPE Support of
upcoming maintenance windows.
Refer to https://infosight.hpe.com/dashboards/nimble/wellness/maintenance-windows for more information.
You can disable automated support case generation during planned maintenance from the Manage Maintenance Windows
page. After a maintenance window is set, no further communication with HPE Support is required.
Procedure
1. Install the provided ground wire.
The power supply replacement kit includes a 72 inch 4-gauge ground wire (green and yellow wire). Use the 4-gauge wire
only.
a) Connect the ground cable to both grounding lugs on the rear of the array chassis. Using a 7/16-inch (11 mm) torque
wrench, apply between 41 in-lbs (4.63 N-m) and 57 in-lbs (6.44 N-m) of torque to each nut.
10 to 15 minutes
Replacement DC power supplies ordered from HPE
Case number
Array serial number
ESD (electrostatic discharge) strap or appropriate grounding device
7/16-inch (11 mm) torque wrench
Phillips screwdriver
See Support.
Documentation Feedback: doc-feedback-hpe-storage@hpe.com
Maintenance Procedures 103