There are two PDUs in the rack that contains the server. From the rear of the server, PDU-A is on the left side and PDU-B is on the right side.
Caution - This procedure requires that you handle components that are sensitive to electrostatic discharge. This discharge can cause server components to fail. Follow antistatic precautions to prevent electrostatic damage. See Prevent ESD Damage.
These topics explain how to service PDUs.