Power isolation procedures
This section contains procedures for isolating a problem
in the power system.
The following power isolation procedures should be used if there is no HMC attached to the server. If
the server is connected to an HMC,
use the procedures that are available on the HMC to
continue FRU isolation.
Some field replaceable units (FRUs) can be replaced with the unit powered
on. Follow the instructions in Locating FRUs when
directed to remove, exchange, or install a FRU.
The following safety notices apply throughout the power isolation procedures.
Please read all safety procedures before servicing the system and observe
all safety procedures when performing a procedure.
DANGER
When working on or around the system, observe
the following precautions:
Electrical voltage and current from power, telephone,
and communication cables are hazardous. To avoid a shock hazard:
- Connect power to this unit only with the IBM provided
power cord. Do not use the IBM provided power cord
for any other product.
- Do not open or service any power supply assembly.
- Do not connect or disconnect any cables or perform installation, maintenance,
or reconfiguration of this product during an electrical storm.
- The product might be equipped with multiple power cords. To remove all
hazardous voltages, disconnect all power cords.
- Connect all power cords to a properly wired and grounded electrical outlet.
Ensure that the outlet supplies proper voltage and phase rotation according
to the system rating plate.
- Connect any equipment that will be attached to this product to properly
wired outlets.
- When possible, use one hand only to connect or disconnect signal cables.
- Never turn on any equipment when there is evidence of fire, water, or
structural damage.
- Disconnect the attached power cords, telecommunications systems, networks,
and modems before you open the device covers, unless instructed otherwise
in the installation and configuration procedures.
- Connect and disconnect cables as described in the following procedures
when installing, moving, or opening covers on this product or attached devices.
To
Disconnect:
- Turn off everything (unless instructed otherwise).
- Remove the power cords from the outlets.
- Remove the signal cables from the connectors.
- Remove all cables from the devices
To Connect:
- Turn off everything (unless instructed otherwise).
- Attach all cables to the devices.
- Attach the signal cables to the connectors.
- Attach the power cords to the outlets.
- Turn on the devices.
(D005)
- Power problems
Use the following table to learn how to begin analyzing a power
problem.
- PWR1900
Determine which procedure to use based on the model number.
- PWR1905
A system unit power supply load fault is occurring.
- PWR1906
The server detected an error in the power system.
- PWR1907
A unit was dropped from the SPCN configuration.
- PWR1908
A power supply fault or load fault has occurred in a 5088 or 0588
expansion unit.
- PWR1909
A power supply load fault is occurring in a system expansion unit
or I/O tower.
- PWR1911
You are here because of a power problem on a dual line cord system.
If the failing unit does not have a dual line cord, return to the procedure
that sent you here or go to the next item in the FRU list.
- PWR1917
Displaying or changing the configuration ID.
- PWR1918
A voltage regulator card might be failing.
- PWR1920
Use this procedure to verify that the lights on the server control
panel and the display panel on all attached I/O expansion units are operating
correctly.