IBM DS4700 Installation, User's, And Maintenance Manual page 217

Table 51. Symptom-to-FRU index (continued)
Problem
indicator Component
Amber LED is lit Front panel
(continued)
(Global
Summary Fault
LED)
Battery unit
fault
Amber LED is lit Power supply
and green LED is CRU
off
Amber and green Power supply
LEDs are lit CRU
(Fault and
Power LEDs lit;
SAA lit; Direct
Current Enable
LED is not lit)
All amber and All drive CRUs
green LEDs are
slowly flashing
Possible cause Possible solutions
General machine A Fault LED is lit somewhere on
fault the storage subsystem (check for
Amber LEDs on CRUs).
General machine Open the DS4700 Express
fault (continued) Storage Subsystem Management
window and click on the
Recovery Guru to see problems
in the DS4700 Express
configuration.
Some errors will cause the
Global Summary Fault LED to be
lit but will not cause any
individual CRU Fault LEDs to be
lit. (Drive PFA exceeded or
nominal temperature exceeded
errors are a few examples.)
Follow the corrective actions in
the Recovery Guru window.
Fibre-channel Check that the CRUs are
connection failure properly installed. If none of the
amber LEDs are lit on any of the
CRUs, this indicates an SFP
module transmission fault in the
storage subsystem. Replace the
failed SFP module. See the
DS4000 Storage Manager
software documentation for more
information.
Battery unit failure Verify the failure using DS4000
Storage Manager Client and
replace the failing battery.
The power switch is Replace the failed power supply
turned off or there is or turn on all power supply
an ac power failure. switches.
Power supply failure Replace the failed power supply.
Operating Cool down the environment.
environment is too
hot
Fan failure Replace the power supply and
fan unit CRU
The DS4700 Express controllers are going through
start-of-day process (booting up). Wait up to five
minutes for the controllers to complete the booting
process. If the drive Activity LEDs are not steady lit or
momentarily flicker, and the amber LEDs are unlit after
waiting more than six minutes, contact IBM support.
Chapter 6. Hardware maintenance
185