Lenovo System x3750 M4, Installation And Service Manual

Page: 262 / 982

Replacing a 1400-watt or 900-watt hot-swap power supply
Use this information to replace a 1400-watt or 900-watt hot-swap power supply.
The following notes describe the type of power supply that the server supports and other information that
you must consider when you install a power supply:
• The server comes standard with one 1400-watt (input voltage 110 or 220 V ac auto-sensing) hot-swap
power supply or an optional 900-watt (input voltage 110 or 220 V ac auto-sensing) hot-swap power
supply depending on your model.
Note: You cannot mix 110 V ac and 220 V ac input voltage power supplies in the server, it is not supported.
• Do not mix 900 watt and 1400 watt power supplies in the server, it is not supported.
• These power supplies are designed for parallel operation. In the event of a power-supply failure, the
redundant power supply continues to power the system. The server supports a maximum of two
power supplies.
Note: When two 900 watt or 1400 watt power supplies are installed and connected to 110 V power
source, redundancy is available only for a limited configuration.
• The optional IBM Power Interposer for Redundant Power Option kit or the IBM Microprocessor and
Memory Expansion Tray must be installed in the server to support two power supplies, if one is not
installed in your model.
Statement 5
CAUTION:
The power control button on the device and the power switch on the power supply do not turn off
the electrical current supplied to the device. The device also might have more than one power
cord. To remove all electrical current from the device, ensure that all power cords are disconnected
from the power source.
1
2
Statement 8
CAUTION:
Never remove the cover on a power supply or any part that has the following label attached.
248
Lenovo System x3750 M4 Installation and Service Guide