IBM H Series Installation And Service Manual page 55

Step 1520-2
1. Turn the power off.
2. If you have not already done so, open the rear door of the rack unit and locate
the power supplies.
3. Unplug the power cord from the Power Distribution Unit (PDU)/Power Distribution
Bus (PDB) and the power outlet.
4. Unplug the power cords from the PDU/PDB and the power supplies.
5. Check that the power cord from the power outlet to the PDU/PDB has continuity.
6. Check that the power cords from the PDU/PDB to the power supplies have conti-
nuity.
7. Check that the power outlet has been wired correctly with the correct voltage.
8. Plug the power cords into the PDU/PDB and the power supplies.
9. Plug the power cord into the PDU/PDB and the power outlet.
Did you find a problem?
NO Go to "Step 1520-3" on page 2-22.
YES Correct the problem. Go to "Map 0410: Repair Checkout" in the
Diagnostic Information for Multiple Bus Systems.
Chapter 2. Maintenance Analysis Procedures
2-21