IBM 3531 manual Operating specifications, Turning off the expansion unit in an emergency

2.Make sure that all amber fault LEDs are off. If any fault LEDs are lit (drives, power supplies, or ESM boards), correct the problem before you turn off the power. For guidance, refer to “Symptom-to-FRU index” on page 7.

3.Turn off both power supplies.

Turning off the expansion unit in an emergency

Attention: Emergency situations might include fire, flood, extreme weather conditions, or other hazardous circumstances. If a power outage or emergency situation occurs, always turn off all power switches on all computing equipment. This will help safeguard your equipment from potential damage due to electrical surges when power is restored. If the expansion unit loses power unexpectedly, it might be due to a hardware failure in the power system or midplane (see “Symptom- to-FRU index” on page 7).

Use the following procedure to turn off the expansion unit during an emergency situation:

1.Power down the server attached to the expansion unit.

2.If you have time, stop all activity and check the LEDs (front and back). Make note of any fault LEDs that are lit so that you can correct the problem when you turn on the power again.

3.Turn off all power supplies; then, unplug the power cables from the expansion unit.

Turning on the expansion unit after an emergency

Use the following procedure to restart the expansion unit if you turned off the power supplies during an emergency shutdown, or if a power failure or a power outage occurred:

1.After the emergency situation is over or power is restored, check the expansion unit for damage. If there is no visible damage, continue with Step 2; otherwise, consult with customer to repair the unit.

2.After you have checked for damage, plug in the expansion-unit power cables and turn on the power switches.

3.Check the system documentation for the hardware devices you intend to turn on, and determine the proper power-on sequence.

Note: Be sure to turn on the IBM Netfinity EXP300 before or at the same time you turn on the system unit.

4.Turn on each device, based on the power-on sequence.

5.Turn on both power supplies on the back of the IBM Netfinity EXP300.

6.Only the power (green) LEDs on the front and back should be on. If one or more of the fault (amber) LEDs are on, refer to “Symptom-to-FRU index” on page 7 for instructions.

7.Use your installed software application as appropriate to check the status of the expansion unit.

Operating specifications

The following table summarizes the operating specifications of the expansion unit.

Netfinity EXP300 Type 3531 5