Lenovo ThinkSystem SR550 Maintenance Manual page 103

Attention: This type of power supply is hot-swap only when two power supplies are installed for
redundancy. If only one power supply is installed, you must power off the server before removing the power
supply.
The following tips describe the information that you must consider when you remove a power supply with dc
input.
CAUTION:
1. 240 V dc input (input range: 180-300 V dc) is ONLY supported in Chinese Mainland.
2. Power supplies with 240 V dc are not hot-swappable. To remove the power cord, ensure you have
turned off the server or disconnected the dc power sources at the breaker panel.
3. In order for the ThinkSystem products to operate error free in both a DC or AC electrical
environment, a TN-S earthing system which complies to 60364-1 IEC 2005 standard has to be
present or installed.
在直流输入状态下，若电源供应器插座不支持热插拔功能，请务必不要对设备电源线进行热插拔。此操作可能
导致设备损坏及数据丢失。因错误执行热插拔导致的设备故障或损坏，不属于保修范围。
NEVER CONNECT AND DISCONNECT THE POWER SUPPLY CABLE AND EQUIPMENT WHILE YOUR
EQUIPMENT IS POWERED ON WITH DC SUPPLY (hot-plugging). Otherwise you may damage the
equipment and result in data loss, the damages and losses result from incorrect operation of the equipment
will not be covered by the manufacturers' warranty.
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.
S019
CAUTION:
The power-control button on the device does not turn off the electrical current supplied to the device.
The device also might have more than one connection to dc power. To remove all electrical current
from the device, ensure that all connections to dc power are disconnected at the dc power input
terminals.
.
Chapter 3 Hardware replacement procedures
95