T023: Drive sled fan spinning too slow or not at all
Description A drive sled fan is detected to be spinning too slow or not
at all.
Detection Scenarios Regular polling/monitoring of the fan indicates a problem.
Root Causes
1. Hardware failure of fan.
2. Wiring or PCBA failure.
3. Blocked air paths.
4. Physical obstruction.
Possible CRU Replacements Drive Sled
Resolution Before performing the following:
1. “Removing a Drive Sled” on page 11-9
2. “Replacing a Drive” on page 11-10
refer
to “Diagnosing a Problem” on page 9-3 for additional
diagnostic procedures.
T024: AC power loss
Description A power supply has detected loss of AC power. AC power
loss to a single power supply control module is unlikely to
be able to post this ticket due to the speed at which system
shut down occurs after an AC loss. This Ticket is most
likely to occur when there is AC loss to a redundant power
supply in a control module or any supply in any expansion
module.
Detection Scenarios AC power status from the supply creates an interrupt that
is managed by software.
Root Causes
1. AC supply is gone (cord removed, customer side AC
failure, etc.).
2. Individual on/off switch for the supply has been set to
off.
3. Hardware failure inside supply.
Possible CRU Replacements Power Supply
Resolution Perform the following:
v “DR009: AC Failure Diagnostic” on page 10-33
Before
performing the following:
v “Removing a Primary Power Supply” on page 11-4
v “Replacing a Primary Power Supply” on page 11-4
refer
to “Diagnosing a Problem” on page 9-3 for additional
diagnostic procedures.
T025: Lost electrical connection with single power supply
Description Power supplies report four failure conditions that are
considered to be a hardware failure within the supply: Fan
Fail, Over Temp, DC Fail and Over Current. These failures
can occur in both single and redundant power supply
control modules and any expansion module with a power
supply.
Chapter 10. Service Action Tickets (Txxx) and Diagnostic Resolutions (DRxxx) 10-13
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