Lenovo ThinkSystem SR860 V3 User Manual page 246

To Connect:
1. Turn OFF subject dc power source(s) and equipment
(s) that are attached to this product.
2. Install the power supply unit(s) into the system
housing.
3. Attach dc power cord(s) to the product.
• Ensure correct polarity of -48 V dc connections:
RTN is + and -Vin (typical -48 V) dc is -. Earth
ground should be connected very well.
4. Connect dc power cord(s) to subject power source
(s).
5. Turn ON all the power source(s).
S035
CAUTION:
Never remove the cover on a power supply or any part that has this label attached. Hazardous voltage,
current, and energy levels are present inside any component that has this label attached. There are no
serviceable parts inside these components. If you suspect a problem with one of these parts, contact
a service technician.
Attention: Read "Installation Guidelines" on page 43
that you work safely.
Procedure
Step 1. Make preparation for the task.
a. Make sure the power supply unit to be installed is of the same wattage as the installed ones.
Otherwise, complete the following steps:
1. Turn off the server and peripheral devices.
2. Disconnect the power cords and all external cables.
3. Remove all the installed power supply units.
4. Make sure all the power supply units to be installed are of the same wattage. Do not mix
power supply units of different wattages in the same unit of server.
b. If installing a power supply into an empty bay, remove the power supply filler panel from the
power supply bay.
c. If more than one units are to be installed, start with the lowest available power supply bay.
Step 2. Make sure the label on the power supply is facing up; then, grasp the handle and slide it into the
power supply bay until it clicks into place.
Notes:
• A CFFv4 power supply is used as an example for illustration. The replacement procedure for
CRPS power supply is similar.
• The color of the CRPS handle might be different from the image.
ThinkSystem SR860 V3 User Guide
236
To Disconnect:
1. Disconnect or turn off the subject dc power source(s)
(at the breaker panel) before removing the power
supply unit(s).
2. Remove the subject dc cord(s) and make sure the
wire terminal of power cord(s) is insulated.
3. Unplug the subject power supply unit(s) from the
system housing.
and "Safety inspection checklist" on page 44 to ensure