![](/images/backgrounds/120018/bg65.png)
RX900 S1 Maintenance Manual 101
7 Fan modulesThe server is supplied with four hot-plug fan modules in a 3+1 redundant
configuration. In other words, if one of the four fan modules fails, the system will
operate without any problem.
VCAUTION!
●Do not disassemble the power supply unit. Doing so may cause
electric shock.
●Do not damage or modify internal cables or devices.Doing so may
cause a device failure, fire, or electric shock.
●Devices inside the server remain hot after shutdown. Wait for a while
after shutdown before installing or removing internal options.
●The circuit boards and soldered parts of internal options are exposed
and can be damaged by static electricity. Before handling them, first
touch a metal part of the server to discharge static electricity from
your body.
●Do not touch the circuitry on boards or soldered parts. Hold the
metallic areas or the edges of the circuit boards.
●If devices are installed or disassembled using methods other than
those outlined in this chapter, the warranty will be invalidated.
●The installation indicated on this note is sometimes changed to the
kind of possible options without notice.
●Follow the safety instructions in the chapter "Safety instructions" on
page 31.