Lenovo ThinkSystem SR630 V3 User Manual page 137

Step 1. If the server is in a rack, adjust the cable management arm (CMA) to gain access to the power
supply unit bay.
Figure 81. CMA adjustment
1. Press down the stop bracket
2. Rotate the CMA out of the way to gain access to the power supply units.
Step 2. Disconnect the power cord from the hot-swap power supply unit.
• For 240 V DC power supply units, turn off the server, and then, disconnect both ends of the
power cord and keep it in an ESD-safe place.
• For AC power supply units, disconnect both ends of the power cord and keep it in an ESD-safe
place.
• For –48V DC power supply units:
1. Disconnect the power cords from the electrical outlet.
2. Use a slotted screwdriver to loosen the captive screws on the power supply terminal block.
3. Disconnect the power cords from the power supply unit, make the wire terminal insulated,
and keep them in an ESD-safe place.
Note: If you are replacing two power supply units, replace them one by one to ensure that the
power supply to the server is not interrupted. Do not disconnect the power cord from the secondly
replaced power supply unit until the power output LED for the firstly replaced power supply unit is
lit. For the location of the power output LED, refer to
and rotate it to the open position.
1
"LEDs on the power supply unit" on page
Chapter 5
.
Hardware replacement procedures
461.
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