Exchanging ac modules in the 5094, 5294, 5096, 5296 and 8294 expansion units (single line cord)

Use this procedure to remove or replace an ac module (A01 and A02) in the single line cord .

1. Is the system or expansion unit with the failing ac module powered on?
   • Yes: Continue with the next step.
   • No: Go to step 3.
2. Is the failing ac module in location A02 (see Locations — 5094, 5294, 5096, 5296, 8094-002, 8294, and 9194 expansion unit)?
   • No: The failing ac module is in location A01. Power off the system (see Powering on and powering off) and continue with the next step.
   • Yes: Do not power off the system or expansion unit if it is powered on; this procedure can be performed concurrently. Continue with the next step.
3. Open the rear cover (see Exchanging the covers in the 5074, 5079, 5094, 5294, 5096, 5296, 8079-002, 8093-002, 8094-002, and 8294 expansion units).
4. Trace and disconnect the ac input line cord that connects to the ac module that needs replacing (see Locations — 5094, 5294, 5096, 5296, 8094-002, 8294, and 9194 expansion unit).
   Attention: Do not disconnect the other nonfailing unit ac line cord when powered on.
5. Disconnect the power supply jumper cords from the ac module that you are working on.
   Attention: Do not disconnect the other system ac module power supply jumper cords.
6. Remove the top and bottom screws that hold the ac module to the expansion unit.
7. Remove the ac module unit.
8. Install the new ac module by reversing this procedure.
   Note: Do not install power supplies P00 and P01 ac jumper cables on the same ac input module.
9. After exchanging the module, go to Verifying the repair. This ends the procedure.