Chassis faults are external faults: there is no hardware failure, but an external condition exists that can adversely affect the operation of the system. Because they are external, chassis faults are auto-clearing; when fault management detects that the external condition has returned to within normal parameters, it clears the fault. A fault is declared, however, and the chassis Service Action Required LEDs are lit because the external condition represents a potential hazard to the system. It is possible for an external fault to force a shutdown of the entire system.
Fault management detects the following chassis faults:
fault.temperature.high_warn@external/air_temp
fault.temperature.high_shutdown@external/air_temp
fault.temperature.low_warn@external/air_temp
fault.temperature.low_shutdown@external/air_temp
Fault cause:
The external ambient air temperature exceeds 36oC (96.8oF).
Action in response to fault:
The chassis Service Action Required LEDs are lit.
The ILOM management interfaces are updated to reflect the fault.
The fault is recorded in the event log.
Fault clearing:
This external fault is automatically cleared when the ambient temperature falls below 36oC (96.8oF).
Fault cause:
The external ambient air temperature exceeds 43oC (109.4oF).
Action in response to fault:
The ILOM management interfaces are updated to reflect the fault.
The fault is recorded in the event log.
The CMM notifies all SPs to force the blades to shut down. The hosts have two minutes in which to shut down gracefully; after two minutes the SPs force an immediate shutdown.
The chassis is powered off.
The CMM remains operational as long as the power supplies remain connected to AC power.
Note that the chassis Service Action Required LEDs were already lit when the fault.temperature.high_warn@external/air_temp fault was declared.
Fault clearing:
This external fault is automatically cleared when the ambient temperature falls below 43oC (109.4oF).
Note that the chassis Service Action Required LEDs are not extinguished until the temperature falls below the fault.temperature.high_warn@external/air_temp threshold.
Fault cause:
The external ambient air temperature falls below 4oC (39.2oF).
Action in response to fault:
The chassis Service Action Required LEDs are lit.
The ILOM management interfaces are updated to reflect the fault.
The fault is recorded in the event log.
Fault clearing:
This external fault is automatically cleared when the ambient temperature rises above 4oC (39.2oF).
Fault cause:
The external ambient air temperature falls below -2oC (28.4oF).
Action in response to fault:
The ILOM management interfaces are updated to reflect the fault.
The fault is recorded in the event log.
The CMM notifies all SPs to force the blades to shut down. The hosts have two minutes in which to shut down gracefully; after two minutes the SPs force an immediate shutdown.
The chassis is powered off.
The CMM remains operational as long as the power supplies remain connected to AC power.
Note that the chassis Service Action Required LEDs were already lit when the fault.temperature.low_warn@external/air_temp fault was declared.
Fault clearing:
This external fault is automatically cleared when the ambient temperature rises above -2oC (28.4oF).
Note that the chassis Service Action Required LEDs are not extinguished until the temperature rises above the fault.temperature.low_warn@external/air_temp threshold.