Troubleshooting
E F 3 0 1 5 S e t u p G u i d e ( R e v A )
42
5.9
Resolving voltage and temperature warnings
1.
Check that all of the fans are working by making sure each power supply’s Voltage/Fan
Fault/Service Required LED is off, or by using RAIDar to check for yellow yield icon
hardware warnings. (In the Configuration View panel, right click the enclosure and
click
View > Overview
.)
2.
Make sure that all modules are fully seated in their slots and that their latches are
locked.
3.
Make sure that no slots are left open for more than two minutes.
If you need to replace a module, leave the old module in place until you have the
replacement or use a blank module to fill the slot. Leaving a slot open negatively affects
the airflow and can cause the enclosure to overheat.
4.
Try replacing each power supply one at a time.
5.
Replace the controller modules one at a time.
Sensor locations
The storage system monitors conditions at different points within each enclosure to alert
you to problems. Power, cooling fan, temperature, and voltage sensors are located at key
points in the enclosure. In each controller module and expansion module, the enclosure
management processor (EMP) monitors the status of these sensors to perform SCSI
enclosure services (SES) functions.
The following sections describe each element and its sensors.
Power supply sensors
Description
Event/Fault ID LED condition
Power supply 1
Voltage, current, temperature, or fan fault
Power supply 2
Voltage, current, temperature, or fan fault
Each enclosure has two fully redundant power supplies with load-sharing capabilities. The
power supply sensors described in the following table monitor the voltage, current,
temperature, and fans in each power supply. If the power supply sensors report a voltage that
is under or over the threshold, check the input voltage.
Cooling fan sensors
Each power supply includes two fans. The normal range for fan speed is 4,000 to 6,000 RPM.
When a fan’s speed drops below 4,000 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 4,000 RPM threshold, the
internal enclosure temperature may continue to rise. Replace the power supply reporting the
fault.
Description
Location
Event/Fault ID LED condition
Fan 1
Power supply 1
< 4,000 RPM
Fan 2
Power supply 1
< 4,000 RPM