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Cannot Power On I/O Rack (No Error Code)
1. Power off the system (see "Powering Off and Powering On the System" on
page 492).
2. Starting from J15 or J16 on the system unit (refer to "System Rack Locations Rear"
on page 18 for location), go to the first I/O rack in the I/O rack interconnect cable
sequence on which the PDB Power On light is off.
3.
Note: Read the Danger and Caution notices under "Safety Notices" on page xiii
Use a multimeter to measure the ac voltage at the customer's ac power outlet.
Is the ac voltage from 200 V ac to 240 V ac?
No
Yes
4. Is the ac power cable from the I/O rack PDB to the customer's ac power outlet
connected and seated correctly at both ends?
No
Yes
before continuing with this procedure.
Inform the customer that the ac voltage at the power outlet is not correct.
This ends the procedure. Go to "Map 0410: Repair Checkout" in the
Diagnostic Information for Multiple Bus Systems.
Go to step 4 of this procedure.
Connect the ac power cables correctly at both ends.
This ends the procedure. Go to "Map 0410: Repair Checkout" in the
Diagnostic Information for Multiple Bus Systems.
Go to step 5 of this procedure.
Chapter 3. Maintenance Analysis Procedures
95
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