Overtemperature Condition And Power Supply Shutdown; Turning On The Power After An Overtemperature Shutdown; Fan And Communications And Power Supply Fault Indicators; Storage Server Fan Indicator - IBM TotalStorage DS4400 User Manual

Overtemperature condition and power supply shutdown

If the fan and communications module fails or is unable to maintain an internal
temperature below 70° C (158° F), one or both of the power supplies in the DS4400
Storage Server might shut down (see Figure 30). If both power supplies shut down,
the DS4400 Storage Server is not operational.
Figure 30. Fan and communications and power supply fault indicators
The storage-management software causes the fan and communications module
fault indicator and storage server fan indicator to light before the temperature has
risen sufficiently to shut down the power supplies. The storage server fan indicator
light, shown in Figure 31, is lit when the DS4400 Storage Server temperature
exceeds 45° C (113° F). The DS4400 Storage Server shuts down if the temperature
rises to 70° C (158° F). If both power supplies shut down, the fault indicator cannot
light.
Storage server
fan indicator light
Figure 31. Storage server fan indicator

Turning on the power after an overtemperature shutdown

If your DS4400 Storage Server shuts down unexpectedly, use the
storage-management software to determine if the DS4400 Storage Server is
overheated. If an overtemperature shutdown is indicated, use the following
procedure to regain normal system operation.
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IBM TotalStorage DS4400 Fibre Channel Storage Server: User's Guide
Fault
Amber light indicates a fault in the fan and
communications module.
Normal status: Off
Problem status: On
2 Gb/s 2 Gb/s 2 Gb/s 2 Gb/s
1 Gb/s 1 Gb/s 1 Gb/s 1 Gb/s
! ! ! !
OUT OUT OUT OUT
IN IN IN IN
Power Supply
Green light indicates
that the power supply
is operating properly.
Normal status: On
Problem status: Off
2 Gb/s 2 Gb/s 2 Gb/s 2 Gb/s
1 Gb/s 1 Gb/s 1 Gb/s 1 Gb/s
! ! ! !
OUT OUT OUT OUT
IN IN IN IN
Power Supply
Green light indicates
that the power supply
is operating properly.
Normal status: On
Problem status: Off