Power supply and fan (CRU)

Use this procedure to install and remove the power supply and fan.

Removing a power supply or fan with power on

If your system is managed by the Hardware Management Console (HMC), you can use the HMC to complete the steps for removing a power supply. For instructions, see Removing a part using the Hardware Management Console.

Attention: Two power supplies must be present in the expansion unit. If one power supply fails, the expansion unit continues to operate.

To remove a power supply or fan from an expansion unit in a system that is not managed by the HMC while the system power is on, complete the following steps:

Complete the prerequisite tasks described in Before you begin.
Open the front rack door.
Identify the power supply that needs to be replaced, as described in Identifying a failing part.
At the front of the expansion unit, identify the power supply that must be replaced. To identify the power supply, observe the state of the amber field-replaceable unit (FRU) fault and identify light-emitting diode (LED) (A) as shown in Figure 1. A lit (flashing or on solid) LED indicates the failing power supply.
Figure 1. FRU fault and identify LED
Remove the plastic baffle cover from the front of the IO drawer, by first removing the two screws and use the touch points to take off the cover.
For the power supply that you want to remove, slide the cable retention bracket to the open position (A), and then disconnect the power cable (B) as shown in Figure 2. By moving the bracket to the open position, you turn the power supply off.
Figure 2. Disconnecting the power cable from the front of an expansion unit
Attach the wrist strap.
Attention:
- Attach a wrist strap to an unpainted metal surface of your hardware to prevent electrostatic discharge (ESD) from damaging your hardware.
- When using a wrist strap, follow all electrical safety procedures. A wrist strap is for static control. It does not increase or decrease your risk of receiving electric shock when using or working on electrical equipment.
- If you do not have a wrist strap, just prior to removing the product from ESD packaging and installing or replacing hardware, touch an unpainted metal surface of the system for a minimum of 5 seconds.
Rotate the power-supply locking handle (A) to the open position as shown in Figure 3, and then pull the power supply out of the expansion unit.
Figure 3. Removing a power supply
Optional: If you must remove a failing power-supply fan, complete the following steps:
Note: If a fan fails, the amber fan fault LED (B) on the front of the Offline Converter Assembly (OCA), as shown in Figure 4, is on solid.
Figure 4. Fan fault LED and fan identify button
1. Identify the failing fan by pressing the fan identify button (A) shown in Figure 4. An amber left or right fan-fault LED (C) on solid, as shown in Figure 5, indicates the faulty fan.
  Figure 5. Removing a fan
2. Loosen the thumbscrew (A) that holds the fan in the power-supply assembly, as shown in Figure 5.
3. Use the recessed fan handle (B) to pull the fan out of the power-supply assembly, as shown in Figure 5.

If you removed the power supply or fan as part of another service action, or if you must replace the power supply or fan that you removed from an expansion unit, see Replacing a power supply or fan in a 5802 or 5877 expansion unit with power on.

Replacing a power supply or fan with power on

If your system is managed by the Hardware Management Console (HMC), you can use the HMC to complete the steps for replacing a power supply. For instructions, see Exchanging a part using the Hardware Management Console.

Attention: Two power supplies must be present in the expansion unit. If one power supply fails, the expansion unit continues to operate.

To replace the power supply in an expansion unit for a system that is not managed by the HMC while the system power is on, complete the following steps:

If you are replacing a power supply or power-supply fan because of a failure, remove the failing part as described in Removing a power supply or fan from a 5802 or 5877 expansion unit with power on.
Complete the prerequisite tasks described in Before you begin.
Open the front rack door if it is not already open.
Attach the wrist strap.
Attention:
- Attach a wrist strap to an unpainted metal surface of your hardware to prevent electrostatic discharge (ESD) from damaging your hardware.
- When using a wrist strap, follow all electrical safety procedures. A wrist strap is for static control. It does not increase or decrease your risk of receiving electric shock when using or working on electrical equipment.
- If you do not have a wrist strap, just prior to removing the product from ESD packaging and installing or replacing hardware, touch an unpainted metal surface of the system for a minimum of 5 seconds.
Optional: If you need to replace a failing power-supply fan, complete the following steps:
1. Align the new fan with the opening in the power-supply assembly.
2. Press the fan (A) into its connector in the assembly as shown in Figure 6.
3. Tighten the thumbscrew (D) as shown in Figure 6.
  Figure 6. Replacing a fan
To replace the power supply, with the locking handle (A) in the open position, push the power supply into the expansion unit as shown in Figure 7.
Figure 7. Replacing a power supply
Close the locking handle (A) until the power supply locks into position.
Reconnect the power cable (A) to the front of the power supply, and then slide the cable retention bracket (B) to the closed position to secure the cable as shown in Figure 8. When the bracket is moved to the closed position, the power supply is turned on.
Figure 8. Connecting the power cable to the front of an expansion unit
Note the state of the green ac power in (A) and Offline Converter Assembly (OCA) power light-emitting diodes (LEDs) (B) shown in Figure 9, and do one of the following actions, as applicable:
- If the LEDs indicate that the power supply is operating normally, that is, that the ac power in LED (A) is on solid and the OCA power (B) LED is on solid or blinking, continue to the next step.
- If not, remove the power supply from the expansion unit and repeat the procedure starting with step 6. If, after repeating the procedure, the power supply is not operating normally, contact your service provider.
Figure 9. Expansion unit ac power and OCA power LEDs

Note: If you replaced a power-supply fan as part of this procedure, note the state of the fan fault LED (B) shown in Figure 10. If the LED is off, indicating that both fans are operating normally, continue to the next step. If not, remove the power-supply assembly from the expansion unit and repeat the procedure starting with step 5. If, after repeating the procedure, the power-supply fan is not operating normally, contact your service provider.

Figure 10. Fan fault LED
Verify the installed part, as described in Verifying the installed part.
Close the front rack door.

Continue with any other service actions you need to perform.

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Last updated: Thu, October 03, 2013