Map 1520: Power - IBM TotalStorage NAS Gateway 500 Service Manual

MAP 1520: Power

Notes:
1. This is not a start-of-call MAP. Use this Power MAP only if you have been directed here from another
MAP, an SRN in the RS/6000 Eserver pSeries Diagnostic Information for Multiple Bus Systems, or an
error code.
2. This procedure is used to locate power problems in system units. If a problem is detected, this
procedure helps you isolate the problem to a failing unit.
3. The NAS Gateway 500 always has two power supplies installed with separate power receptacles on
the back of the power supply. There are three LEDs located on the front and top of the power supply:
v AC good LED (green)
v DC good LED (green)
v Power supply fault indicator LED (amber)
The LEDs indicate the condition of the power supply. Refer to "Component LEDs" on page 384 for
additional information.
4. The condition of two power supplies being present, but only one working, can be determined by the
service processor and a warning level EPOW.
5. Observe the following safety notices during service procedures.
DANGER
An electrical outlet that is not correctly wired could place hazardous voltage on metal parts of
the system or the devices that attach to the system. It is the responsibility of the customer to
ensure that the outlet is correctly wired and grounded to prevent an electrical shock. (D09)
Before installing or removing signal cables, ensure that the power cables for the system unit
and all attached devices are unplugged.
When adding or removing any additional devices to or from the system, ensure that the power
cables for those devices are unplugged before the signal cables are connected. If possible,
disconnect all power cables from the existing system before you add a device.
Use one hand, when possible, to connect or disconnect signal cables to prevent a possible
shock from touching two surfaces with different electrical potentials.
CAUTION:
This product is equipped with a 3-wire power cable and plug for the user's safety. Use this power
cable in conjunction with a correctly grounded electrical outlet to avoid an electrical shock. (C10)
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NAS Gateway 500 Service Guide