Safety Inspection Checklist - Lenovo ThinkSystem SN850 Setup Manual

• Back up all important data before you make changes related to the disk drives.
• Have a small flat-blade screwdriver, a small Phillips screwdriver, and a T8 torx screwdriver available.
• To view the error LEDs on the system board and internal components, leave the power on.
• You do not have to turn off the compute node to remove or install hot-swap power supplies, hot-swap
fans, or hot-plug USB devices. However, you must turn off the compute node before you perform any
steps that involve removing or installing adapter cables, and you must disconnect the power source from
the compute node before you perform any steps that involve removing or installing a riser card.
• Blue on a component indicates touch points, where you can grip to remove a component from or install it
in the compute node, open or close a latch, and so on.
• Terra-cotta on a component or an terra-cotta label on or near a component indicates that the component
can be hot-swapped if the compute node and operating system support hot-swap capability, which
means that you can remove or install the component while the compute node is still running. (Terra-cotta
can also indicate touch points on hot-swap components.) See the instructions for removing or installing a
specific hot-swap component for any additional procedures that you might have to perform before you
remove or install the component.
• The Red strip on the drives, adjacent to the release latch, indicates that the drive can be hot-swapped if
the compute node and operating system support hot-swap capability. This means that you can remove or
install the drive while the compute node is still running.
Note: See the system specific instructions for removing or installing a hot-swap drive for any additional
procedures that you might need to perform before you remove or install the drive.
• After finishing working on the compute node, make sure you reinstall all safety shields, guards, labels, and
ground wires.

Safety inspection checklist

Use the information in this section to identify potentially unsafe conditions with your solution. As each
machine was designed and built, required safety items were installed to protect users and service
technicians from injury.
CAUTION:
This equipment must be installed or serviced by trained personnel, as defined by the NEC, IEC 62368-
1 & IEC 60950-1, the standard for Safety of Electronic Equipment within the Field of Audio/Video,
Information Technology and Communication Technology. Lenovo assumes you are qualified in the
servicing of equipment and trained in recognizing hazards energy levels in products. Access to the
equipment is by the use of a tool, lock and key, or other means of security, and is controlled by the
authority responsible for the location.
Important: Electrical grounding of the solution is required for operator safety and correct system function.
Proper grounding of the electrical outlet can be verified by a certified electrician.
Use the following checklist to verify that there are no potentially unsafe conditions:
1. Make sure that the power is off and the power cord is disconnected.
2. Check the power cord.
• Make sure that the third-wire ground connector is in good condition. Use a meter to measure third-
wire ground continuity for 0.1 ohm or less between the external ground pin and the frame ground.
• Make sure that the power cord is the correct type.
To view the power cords that are available for the solution:
a. Go to:
http://dcsc.lenovo.com/#/
.
Chapter 3 Compute node hardware setup
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