IBM 3000 6.0.2, Service Manual

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You can also run the mmhealth node show enclosure command on the canister of the affected
enclosure.
To identify the affected enclosure, run the
mmhealth cluster show enclosure command. The
faulty enclosure will be in an DEGRADED or FAILED state.
A faulty power supply would be indicated by the power_supply_failed , power_supply_absent ,
power_high_power , power_high_current or power_no_power events. In the given example, the
event message shows the psu1_left_id0 power supply needs to be replaced:
mmhealth node show enclosure
Node name: fab3-1-b.example.com
Component Status Status Change Reasons
---------------------------------------------------------------------------------------------
----------------------------------------------
ENCLOSURE DEGRADED 1 day ago power_supply_failed(78E021A)
78E021A DEGRADED 1 day ago power_supply_failed(78E021A)
Event Parameter Severity Active Since Event Message
---------------------------------------------------------------------------------------------
------------------------------
power_supply_failed 78E021A WARNING Now Power supply
psu1_left_id0 is failed
Removing the PSU
2. Release the cable retention clip and disconnect the power cord from the power supply unit that you
are replacing.
This figure shows the location of the cable retention clip
1 , LED indicator 2 , PSU 1 release tab 3 ,
PSU handle 4 , and the power interposer release tab 5 .
Figure 7. Features of a power supply unit
3. Fold out the handle so that it extends perpendicular to the PSU.
4. Holding the PSU handle, press and hold the PSU release tab and steadily pull the handle horizontally to
slide the PSU from the enclosure, as shown in this figure.
Support the PSU with your other hand as it is released from the enclosure.
Chapter 2. Servicing 25