Customer Field Replaceable Units (Crus/Frus) - IBM SAN40B-4 - System Storage Switch User & Service Manual

Attention:
the links during diagnostic testing.
For information about specific diagnostic tests, refer to the Fabric OS
Administrator's Guide.

Customer field replaceable units (CRUs/FRUs)

In addition to the SFPs, the only customer field replaceable units (CRUs/FRUs) are
the integrated power supply fan assemblies. The fans are fixed inside the integrated
power supply/fan FRU to provide necessary airflow to cool the whole system. The
system software sets fan speed and measures their speeds through the tachometer
interface. The two power supply/fan assembly FRU units are hot-swappable if
replaced one at a time. They are identical and fit into either slot and can be
replaced onsite without the use of special tools. The power supplies/fan assemblies
units are keyed to ensure correct orientation during installation. When either the
power supply component or one of the fans fails, the entire assembly must be
replaced. Individual components cannot be replaced.
Attention:
the warranty and regulatory certifications. There are no user-serviceable parts
inside the power supply and fan assembly. Because the cooling system relies on
pressurized air, do not leave any of the fan assembly slots empty longer than two
minutes while the switch is operating. If a fan assembly fails, leave it in the switch
until it can be replaced. Maintain all fan assemblies in operational condition to
provide redundancy.
These power supply/fan assemblies are redundant, but should be replaced as soon
as possible to avoid any system shutdown or data loss. Each power supply/fan unit
contains two fans, which will automatically switch to high speed if the other power
supply unit fails. Refer to Table 8 on page 25 for interpreting the power supply LEDs
and recommended actions before replacing the unit. Fabric OS identifies the fans
from left to right when viewed from the nonport side as Fan assembly #2 and Fan
assembly #1.
Any of the following methods can be used to determine whether a power supply
has failed and requires replacing:
v Check the power supply status LED next to the I/O switch. If the power supply
v In Web Tools, click the Power Status icon.
v Type the psShow command at the command prompt to display power supply
Any of the following methods can be used to determine whether a fan has failed
and requires replacing:
v Check the system status LED (see Figure 9 on page 22). If the system status
Diagnostic tests can temporarily lock the transmit and receive speed of
Disassembling any part of the power supply and fan assembly voids
status LED is not on, verify that the power supply is on and seated and the
power cord is connected to a functioning power source. If the light does not turn
green, the power supply needs to be replaced.
status as shown below:
switch:admin> psshow
Power Supply #1 is OK
Power Supply #2 is OK
LED is flashing amber and green, it could mean the fan has failed. The green
power supply/fan LED will also flash in the event of failure. Check the
management interface and the error log for details on the cause of status.
Chapter 3. Operating the switch
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