IBM RS/6000 SP, Maintenance Information

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MAP 0460: Scalable Electrical Power Base Unit
MAP 0460: Scalable Electrical Power Base Unit (SEPBU)
Notes:
1. SEPBU is an acronym for the Scalable Electrical Power Base Unit.
2. Connectors on the SEPBU still use “PDU” as assembly designations, (for example PDU-BH-J7).
DANGER
If a unique power module fails, all LEDs will be off. The high voltage LED will be off even
though the high voltage is still present.
Attention: Be careful when working on a single-phase SEPBU power supply without N+1 (two) power
modules, since there is no secondary power module.
The Scalable Electrical Power Base Unit (SEPBU) consists of the following components:
Ÿ
ac line cord (connectorized)
Ÿ SEPBU power chassis
Ÿ SEPBU power modules
Ÿ Frame supervisor
Ÿ
PCI card (see note below)
Ÿ
Main power switch
Ÿ 48 V dc distribution cables.
Note: For more information on PCI (power control interface) function, see “RS/6000 SP Function” in
Chapter 2 of RS/6000 SP: Maintenance Information, Volume 1
.
001
Problem detected concerning power in system.
Attention: Servicing a processor node with the High Performance Switch (HiPS) feature or Scalable
POWERparallel Switch (SPS) feature installed, will impact the entire switch network, unless the processor
node has already been powered off (or fenced) and/or the switch data cable has been disconnected.
– Refer to "Procedures for the Scalable Electrical Power Base Unit (SEPBU)" in
IBM RS/6000 SP: Main-
tenance Information, Volume 3, Locations and Service Procedures when replacing SEPBU components.
– Check the condition of the following LEDs:
Ÿ Main power switch LED
Ÿ SEPBU rear panel LED
Ÿ Frame supervisor LEDs.
– The following table contains a prioritized list of conditions.
Find the first condition that describes your problem, then perform the suggested action:
Note: The system monitor log can be viewed by issuing the following command:
errpt -a -N sphwlog | pg
on the control workstation.
Chapter 1. Maintenance Analysis Procedures (MAPs)
1-265