Lenovo ThinkSystem SD550 V3 User Manual page 75

2. Remove the power supply units of wattages (or of different vendor for CRPS model)
different from other power supply units.
3. Make sure that all the power supply units in the chassis are of the same wattage, same
vendor, and same latch color. Avoid mixing power supply units of different wattages or
vendors in one chassis.
b. If a PSU filler is installed in the PSU slot, remove it.
1. Press and hold the latch on the PSU filler.
2. Pull the filler out of the PSU slot.
Figure 24. Removal of a PSU filler
c. If more than one power supply units are to be installed, start with the lowest available number
of PSU slot.
Step 2. Insert the hot-swap power supply into the slot until the release latch clicks into place.
Important:
• During normal operation, each power-supply slot must contain either a power supply or power-
supply filler for proper cooling.
• Make sure to follow the instruction on the guiding label in each slot. For slot 1, the power supply
unit must be installed with the fan downward; for slots 2 and 3, the power supply units must be
installed with the fan upward.
• After docking the power supply, hold the handle and slightly pull the power supply to make sure
that it is securely engaged and cannot be pulled out.
.
Chapter 5 Hardware replacement procedures
65