Installing A Hot-Swap Fan - Lenovo System x3550 M4 Installation And Service Manual

Step 7. Route the power cord through the handle and cable tie if any, so that it does not accidentally
become unplugged.
Step 8. Connect the other ends of the dc power cable to the dc power source. Cut the wires to the correct
length, but do not cut them shorter than 150 mm (6 inch). If the power source requires ring
terminals, you must use a crimping tool to install the ring terminals to the power cord wires. The
ring terminals must be UL approved and must accommodate the wires that are described in
"Regulations" on page 68. The minimum nominal thread diameter of a pillar or stud type of terminal
must be 4 mm; for a screw type of terminal the diameter must be 5.0 mm.
Step 9. Turn on the circuit breaker for the dc power source to which the new power supply is connected.
Step 10. Make sure that the green power LEDs on the power supply are lit, indicating that the power supply
is operating correctly.
Step 11. If you are replacing a power supply with one of a different wattage in the server, apply the new
power information label provided over the existing power information label on the server. Power
supplies in the server must be with the same power rating or wattage to ensure that the server will
operate correctly.
Figure 58. Power information label
Step 12. If you are adding a power supply to the server, attach the redundant power information label that
comes with this option on the server cover near the power supplies.
Figure 59. Redundant power information label

Installing a hot-swap fan

Use this information to install a hot-swap fan.
The server comes standard with four dual-motor hot-swap cooling fans. When there is one microprocessor
installed, install fan 1, 2, 3, and 5 for proper cooling.
Attention: To ensure proper operation, replace a failed hot-swap fan within 30 seconds.
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Lenovo System x3550 M4 Installation and Service Guide