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
Summary of Contents for AA988A - Modular Smart Array Storage Controller SCSI
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