IBM 8651RM0 Hardware Maintenance Manual - Page 26

Status Indicators

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Status Indicators Status indicators on the server can help to identify problems with some system components such as power supplies and hot-swap drives. Cooling-Failure Status Indicators: The cooling-failure light on the front of the server blinks slowly if one of the fans fails or is predicted to fail (for example, starts to slow down). If more than one fan fails or if the ambient temperature exceeds the warning threshold, the cooling-failure light will blink rapidly; depending upon the version of system management code, an error might be logged in the system management error log. If an ambient temperature exceeds the operating system shutdown threshold, the cooling-fan light will continue to blink rapidly; depending upon the version of system management code, the operating system might start to shutdown. If an ambient temperature exceeds the server shutdown threshold, the cooling-fan light will continue to blink rapidly and the server will shutdown immediately. Power Supply Status Indicators: To determine the status of a power supply, examine the following indicators: Green Power-On light on the front of the server Amber Power-Failure light on the front of the server Green AC Power light on the back of the power supply Green DC Power light on the back of the power supply If the green Power-On light on the front of the server is on, and the amber Power-Failure light on the front of the server is off, all power supplies are operational. If the green Power-On light on the front of the server is on, and the amber Power-Failure light on the front of the server is on, a power supply has failed. Check the lights on each of the power supplies. Note To ensure that the power supply is operational, both lights must be on. Also check the power up sequence, see "Power Up Sequence" on page 19. 18 Netfinity Server HMM

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Status Indicators
Status indicators on the server can help to identify
problems with some system components such as power
supplies and hot-swap drives.
Cooling-Failure Status Indicators:
The
cooling-failure light on the front of the server blinks slowly
if one of the fans fails or is predicted to fail (for example,
starts to slow down).
If more than one fan fails or if the ambient temperature
exceeds the warning threshold, the cooling-failure light will
blink rapidly; depending upon the version of system
management code, an error
might be logged in the
system management error log.
If an ambient temperature exceeds the operating system
shutdown threshold, the cooling-fan light will continue to
blink rapidly; depending upon the version of system
management code, the operating system might start to
shutdown.
If an ambient temperature exceeds the server shutdown
threshold, the cooling-fan light will continue to blink rapidly
and the server will shutdown immediately.
Power Supply Status Indicators:
To determine
the status of a power supply, examine the following
indicators:
Green Power-On light on the front of the server
Amber Power-Failure light on the front of the server
Green AC Power light on the back of the power
supply
Green DC Power light on the back of the power
supply
If the green Power-On light on the front of the server is on,
and the amber Power-Failure light on the front of the
server is off, all power supplies are operational.
If the green Power-On light on the front of the server is on,
and the amber Power-Failure light on the front of the
server is on, a power supply has failed.
Check the lights
on each of the power supplies.
Note
To ensure that the power supply is operational, both
lights must be on.
Also check the power up
sequence, see “Power Up Sequence” on page
19.
18
Netfinity Server HMM