HP AA988A HP StorageWorks 2012sa Modular Smart Array user guide (488320-002, J - Page 67

Power Supply Sensors, Cooling Fan Sensors, Table 5-1

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Power Supply Sensors Each enclosure has two fully redundant power-and-cooling modules with loadsharing capabilities. The power supply sensors described in the following table monitor the voltage, temperature, and fans in each power-and-cooling module. If the power supply sensors report a voltage that is under or over the threshold, check the input voltage. Table 5-1 Power Supply Sensors Description Location Power supply 1 Power-and-cooling module 0 Power supply 2 Power-and-cooling module 1 Event/Fault ID LED Condition Voltage, temperature, or fan fault Voltage, temperature, or fan fault Cooling Fan Sensors Each power-and-cooling module includes two fans. The normal range for fan speed is 4000 to 6000 RPM. When a fan's speed drops below 4000 RPM, the EMP considers it a failure and posts an alarm in the storage system's event log. The following table lists the description, location, and alarm condition for each fan. If the fan speed remains under the 4000 RPM threshold, the internal enclosure temperature may continue to rise. Replace the power-and-cooling module reporting the fault. Table 5-2 Cooling Fan Sensor Descriptions Description Location Event/Fault ID LED Condition Fan 0 Power-and-cooling module 0 < 4000 RPM Fan 1 Power-and-cooling module 0 < 4000 RPM Fan 2 Power-and-cooling module 1 < 4000 RPM Fan 3 Power-and-cooling module 1 < 4000 RPM During a shutdown, the cooling fans do not shut off. This allows the enclosure to continue cooling. Chapter 5 Troubleshooting 67

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Chapter 5
Troubleshooting
67
Power Supply Sensors
Each enclosure has two fully redundant power-and-cooling modules with load-
sharing capabilities. The power supply sensors described in the following table
monitor the voltage, temperature, and fans in each power-and-cooling module. If the
power supply sensors report a voltage that is under or over the threshold, check the
input voltage.
Cooling Fan Sensors
Each power-and-cooling module includes two fans. The normal range for fan speed
is 4000 to 6000 RPM. When a fan’s speed drops below 4000 RPM, the EMP
considers it a failure and posts an alarm in the storage system’s event log. The
following table lists the description, location, and alarm condition for each fan. If
the fan speed remains under the 4000 RPM threshold, the internal enclosure
temperature may continue to rise. Replace the power-and-cooling module reporting
the fault.
During a shutdown, the cooling fans do not shut off. This allows the enclosure to
continue cooling.
Table 5-1
Power Supply Sensors
Description
Location
Event/Fault ID LED Condition
Power supply 1
Power-and-cooling module 0
Voltage, temperature, or fan fault
Power supply 2
Power-and-cooling module 1
Voltage, temperature, or fan fault
Table 5-2
Cooling Fan Sensor Descriptions
Description
Location
Event/Fault ID LED Condition
Fan 0
Power-and-cooling module 0
< 4000 RPM
Fan 1
Power-and-cooling module 0
< 4000 RPM
Fan 2
Power-and-cooling module 1
< 4000 RPM
Fan 3
Power-and-cooling module 1
< 4000 RPM