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3. Unpack the new fan and communications module.
4. Install the new fan and communications module.
5. Check the fan and communications indicator light. See Figure 42 on page 49 for
6. Reconnect the interface cables that you disconnected in Step 1 on page 49 to
Power supply
The FAStT900 Storage Server power system consists of two power supplies. The
power supplies slide into either of the two slots on the back of the FAStT900
Storage Server. The power supplies provide power to the internal components by
converting incoming ac voltage to dc voltage. The power supplies are
interchangeable and redundant. Each power supply uses one power cord. You can
plug both power cords into a common power source or plug each cord into a
separate circuit for power redundancy. One power supply can maintain electrical
power to the FAStT900 Storage Server if the other power supply is turned off or
malfunctions.
Servicing notes
Consider the following factors when you service the power supplies:
v Each power supply has a built-in sensor that detects the following conditions:
v You can hot swap (replace) a power supply because the two power supplies
50
IBM TotalStorageFAStT900 Fibre Channel Storage Server: User's Guide
Attention:
When you handle static-sensitive devices, take precautions to
avoid damage from static electricity. For details about handling static-sensitive
devices, see "Handling static-sensitive devices" on page 37.
a. Push the new fan and communications module all the way into its chassis
slot.
b. Use a flat-blade screwdriver to tighten the two captive screws on the new
module, securing it into place.
the location of the fan and communications indicator light.
v If the amber fault indicator light is on, make sure that the fan and
communications module is inserted all the way into the chassis and secured
in place.
v If the fault indicator light remains on, one or both fans inside the fan and
communications module might be malfunctioning. Replace the failed fan and
communications module with a spare, if available. Otherwise, shut down the
FAStT900 Storage Server until you can replace the failed fan and
communications module with a new one.
the new fan and communications module.
– Overvoltage
– Overcurrent
– Overtemperature
If any of these conditions occur, one or both power supplies enter shutdown
mode. All power remains off until one of the following events occurs:
– You cycle the power switches (turn off the power switches, wait at least 30
seconds, then turn on the power switches). For more information, see
"Overtemperature condition and power supply shutdown" on page 31.
– The power supplies automatically resume operation when the ambient air
temperature cools to below 70° C (158° F). When the power supplies
automatically resume operation, the FAStT900 Storage Server also resumes
operation.
provide redundancy.
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