Resetting The Controller Circuit Breakers - IBM DS4800 User, Installation And Maintenance Manual

Resetting the controller circuit breakers

Each storage subsystem controller has two circuit breakers that provide
over-current protection to the power supply in a power supply-fan. The circuit
breakers are mounted inside the controller, in line with the internal power cable.
One circuit breaker provides protection for AC input, and the second circuit breaker
provides protection for DC input.
Note: DC power input is not currently supported for the DS4800. Contact your IBM
The internal power cable runs from the AC connector on a controller to the power
supply in a power supply-fan. Power to the right power supply-fan (as viewed from
the front of the storage subsystem) is routed through the top controller (controller
A); power to the left power supply-fan is routed through the bottom controller
(controller B).
If a circuit breaker has tripped, the condition might appear as if a power supply-fan
has failed. The power supply is no longer providing power to the storage
subsystem. A tripped circuit breaker is indicated when all of the following conditions
are present:
v The Overall DS4800 Configuration Needs Attention on the storage subsystem
v The controller Needs Attention LEDs are not turned on
v The power supply-fan Needs Attention LEDs are not turned on
v The Service Action Allowed LED is turned on for the power supply-fan connected
v The DS4000 Storage Manager client shows the power supply-fan unit has failed
Use the following procedure to reset the circuit breaker.
Tools and Equipment
v Antistatic protection
v Nonconducting stylus
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IBM System Storage DS4800 Storage Subsystem: Installation, User's, and Maintenance Guide
a. Select the Recovery Guru toolbar button in the Subsystem Management
Window to run the Recovery Guru.
b. Complete the recovery procedure.
If the Recovery Guru directs you to replace a failed component, use the
individual LEDs on the storage subsystem to locate the specific failed
component.
c. When the procedure is completed, select Recheck in the Recovery Guru.
This will rerun the Recovery Guru to ensure that the problem has been
fixed.
d. If the problem has not been fixed contact your IBM service representative.
Print a storage subsystem profile and save the storage subsystem support
data. The profile and support data will be helpful when troubleshooting
storage subsystem problems. (For information about printing a storage
subsystem profile and saving the support data, refer to the Subsystem
Management Window online help.)
service representative or reseller for information about possible future
support for DC power input.
front bezel is turned on
to the controller with the open circuit breaker