Power Supply Sensors; Cooling Fan Sensors - HP AA988A - Modular Smart Array Storage Controller SCSI User Manual

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.
Table 5-1 Power Supply Sensors
Description Location
Power supply 1 Power-and-cooling module 0
Power supply 2 Power-and-cooling module 1

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
Fan 0 Power-and-cooling module 0
Fan 1 Power-and-cooling module 0
Fan 2 Power-and-cooling module 1
Fan 3 Power-and-cooling module 1
During a shutdown, the cooling fans do not shut off. This allows the enclosure to
continue cooling.
Event/Fault ID LED Condition
Voltage, temperature, or fan fault
Voltage, temperature, or fan fault
Event/Fault ID LED Condition
< 4000 RPM
< 4000 RPM
< 4000 RPM
< 4000 RPM
Chapter 5 Troubleshooting 67