Psu And System Fan Faults; Thermal Monitoring And Control - IBM 106 Hardware Installation And Maintenance Manual

Table 8. Fault conditions (continued)
Status
RAID error
CFF interface module fault
CFF interface module removed
Drive power control fault
Insufficient power available
1. The enclosure will continue operating, requiring an administrator to take appropriate action; such as
replacing a PSU or reducing the room temperature. Alarm messages are signaled by the SES pages
(page 29).
2. An alarm is not issued for this status and severity condition.
3. The enclosure will take action; such as shutting down in order to protect the enclosure's data content.
Alarm messages are signaled by the SES pages (page 29).

PSU and system fan faults

Symptom
Front panel Module Fault LED is
1
amber
Amber LED is illuminated on fan
2
module
1-See Figure 12 on page 15 for visual reference of front panel LEDs.
2-See Figure 13 on page 16 for visual reference of PSU LEDs. See Figure 14 on page 18 for visual
reference of system fan module LEDs.

Thermal monitoring and control

The storage enclosure system uses extensive thermal monitoring and takes a number of actions to ensure
component temperatures are kept low, and to also minimize acoustic noise.
Air flow is from the front to back of the enclosure.
Severity
Fault– critical
Fault– critical
Warning
Fault– critical–loss of disk power
Warning
Cause
Any power fault
Fan failure
Chapter 6. Troubleshooting and problem solving 59
Recommended action
Verify AC mains connections to
the PSU are live
Replace system fan module