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4-12
Troubleshooting
Compaq ProLiant Storage System /U User Guide
Redundant Power Supply Systems
In a ProLiant Storage System /U with the Redundant Power Supply option
installed, there are two identical power supplies. If either supply is faulty, an
amber light indicates that a fault exists. An amber indicator does not always
indicate the bad supply. Either power supply may be replaced with the storage
system power on without affecting normal system operation.
1. Unplug the power cord from the failed supply. If the system is running,
be careful not to disturb the power cord for the other power supply.
2. Depress the catch on the power supply handle and pivot the handle open
to release the power supply. Pull the supply from the chassis. See
Figure 4-8.
CAUTION:
Do not operate the ProLiant Storage System /U for extended
periods of time with either power supply location open. Internal cooling air
flow will be disrupted without a power supply or blank cover installed in both
locations. This could cause overheating of internal components and possible
data loss. In Redundant Power Supply systems, retain the blank cover for
reuse in case it is necessary to remove one of the supplies.
3. With the handle fully open, insert the replacement supply into the
opening and slide it in along the rails as far as it will go.
4. Pivot the handle closed until it snaps into place. This will secure the
power supply in the chassis. See Figure 4-9.
5. Plug the power cord in the new supply.
The status indicators on both supplies as well as the fault indicator on the front
panel should now be green, indicating that power supply redundancy has
been restored.
