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– Use a slow lifting force. Never move suddenly or twist when you lift a heavy object.
– To avoid straining the muscles in your back, lift by standing or by pushing up with your leg muscles.
• 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 (system board assembly) and internal components, leave the
power on.
• You do not have to turn off the node to remove or install hot-swap power supplies, hot-swap drives, or
hot-plug USB devices. However, you must turn off the node and remove it from the chassis before
performing any steps that involve removing or installing components or cables inside the node.
• When replacing power supply units, make sure to refer to redundancy rules.
• Blue on a component indicates touch points, where you can hold to remove a component from or install it
in the system, open or close a latch, and so on.
• Orange on or near a component indicates that the component can be hot-swapped if the node and
operating system support hot-swap capability, which means that you can remove or install the
component while the node is still running (Orange 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 node and operating system support hot-swap capability. This means that you can remove or install the
drive while the 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 node or chassis, make sure to 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 system. As each
machine was designed and built, required safety items were installed to protect users and service
technicians from injury.
Note: The product is not suitable for use at visual display workplaces according to §2 of the Workplace
Regulations.
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 system 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.
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ThinkSystem D3 Chassis User Guide
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