Temperature Sensors; Troubleshooting - IBM 106 Hardware Installation And Maintenance Manual

Table 7. Expansion module LED states (continued)
CRU OK (Green)
Blinking
Actions:
• If the Power OK LED is blinking, wait for the system to boot.
• If the Power OK LED is off, and the IOM/EBOD expander module is powered on, the module has failed.
– Check that the IOM/EBOD expander module is fully inserted and latched in place, and that the
enclosure is powered on.
– Check for logs pertaining to the failure.
• If the Fault LED is on, a fault condition is detected.
– Reseat the IOM/EBOD expander module in its slot.
– Check for logs pertaining to the failure.
• If the above actions do not resolve the fault, contact your supplier for assistance.

Temperature sensors

Temperature sensors throughout the enclosure and its components monitor the thermal health of the
storage system.
Exceeding the limits of critical values will cause a notification to occur.

Troubleshooting

The following sections describe common problems that can occur with your enclosure system, and some
possible solutions.
For the problems listed in Table 8 on page 58, the pertinent fault LEDs on the enclosure front panel will
light amber to indicate a fault and report to ESS software where appropriate. See also Overview of front
panel LEDs.
Table 8. Fault conditions
Status
PSU alert -loss of DC power from a single PSU
PSU fan fail
CFF module detected PSU fault
PSU removed
Enclosure configuration error (VPD)
Low warning temperature alert
High warning temperature alert
Over temperature alarm
2
I C bus failure
Front panel communication error (I2C)
58 IBM ESS expansion: Hardware Installation and Maintenance Guide - Model 106
CRU Fault (Amber) SAS port activity
(Green)
Severity
Fault - loss of redundancy
Fault - loss of redundancy
Fault
Configuration error
Fault– critical
Warning
Warning
Fault– critical
Fault– loss of redundancy
Critical fault
Status
Expansion enclosure
VPD error