Replacing a SAN Volume Controller 2145-8A4 power supply

Take precautions to avoid damage from static electricity. Wear an anti-static wrist strap and use a static-protected mat or surface. For more information, see Handling static-sensitive devices.

1. Place the new power supply into the bay.
2. Tighten the captive thumbscrew that secures the rear of the power supply to the chassis bottom.
3. Replace the screw that holds the power supply to the rear of the chassis.
4. Make sure that the air deflector  is in the open position, as shown in Figure 1.
   Figure 1. Air deflector for the SAN Volume Controller 2145-8A4 power supply
5. There are two cables to connect to the system board, as shown in Figure 2. Connect the cable labeled P1  to the position marked 24 PIN POWER CONN. Connect the cable labeled P6  to the position marked POWER.
   Figure 2. SATA connectors on the SAN Volume Controller 2145-8A4 system board
6. Route the power-supply cable with the P5 connector to the CD/DVD interface card and secure it under the retention-clip , as shown in Figure 3, on the chassis.
   Figure 3. The retention clip for the SAN Volume Controller 2145-8A4 power-supply cables
7. Reconnect the cable to the CD/DVD interface card.
8. Connect the power connectors P2 and P3 to the SATA disk back plate and slide the back plate back into position.
9. Rotate the air deflector into place, making sure that no cables are pinched beneath it, and press it down firmly.
10. Test the power supply:
    1. For testing on the bench, only connect the ac power cord from the connector on the back of the power supply to a properly grounded electrical outlet. If you are using the combined power/serial cable, do not connect the serial port.
    2. Make sure that the standby power LED on the system board is lit. If the standby power LED is not lit, discontinue this procedure and obtain a new power supply.
    3. Press the power-control button. Make sure that the power LED on the front of the node is lit.
       • If the node starts, it will go through the boot sequence and then stop and display boot code Failed 181. This is expected, because the uninterruptible power supply is not connected. Proceed to the next step.
       • If the node does not start, disconnect the ac power cord and contact the IBM® Support Center.
    4. Turn off the node using the power-control button and then disconnect the ac power cord.
11. Replace the top cover. See Replacing the top cover.
    
12. Place the node in the rack. See Replacing the SAN Volume Controller in a rack.
    
13. Reconnect the ac power cord into the connector on the back of the power supply, being sure to route the cable through the cable retention bracket in order to minimize mechanical strain on the cable.
14. Connect all external cables that you disconnected before you could remove the power supply.
15. Reconnect the power cord and turn on the 2145 UPS-1U.
16. Turn on the node.
    
17. Make sure that the power LED on the front of the node is lit.