Unit Reference Codes
This procedure uses a system reference code (SRC) that is displayed on the operator
panel, listed in an error log, or reported by the customer to do the following:
v Identify a list of possible failing items.
v Point to additional isolation procedures (if available).
An SRC reported through a message to the system operator may be used when an
error log entry is not available.
The reference code tables in this section support 8-character SRC formats.
Use the following procedure below to find an SRC and perform the recommended
actions.
1. Use the following illustration to:
v Determine the unit reference code (URC) from the SRC reported.
v Determine which SRC table to use.
Notes:
a. In the SRC tables, x can be any number 0 through 9 or letter A through F.
b. Machine check is a condition that is indicated when the system attention light
is on and SRC data for functions 11-3 through 20-3 is displayed on the
system operator panel. When the SRC indicates a machine check, the
leftmost character in the operator panel display for function 11-3 is 0 through
9, A, B, or F.
For information about operator panel display functions, see “Appendix C.
Operator Panel Function Codes” on page 595.
System Operator Panel Display or Problem Summary Form Information
System Reference Code Type
┌───── (SRC table heading, arranged
Function Data in hexadecimal sequence)
┌──┬────┐ ┌────┬────┬──┐
│ │11-3│ │XXXX│XXXX│ │
└──┴────┘ └────┴────┴──┘
└───────── Unit Reference Code
2. Examine Table 7 on page 186.
v The four leftmost characters of the SRC are listed in Table 7 on page 186 to tell
you which type or SRC you have and direct you to the correct SRC table.
Follow the instructions in Table 7 on page 186.
v You have now determined which SRC table you are going to use and the URC
you are going to look for in the SRC table. If you know how to locate and use the
information in the reference code tables, then go to step4 on page 186 in this
procedure.
3. This is an information step that explains how to locate and use the information
contained in the reference code tables.
Chapter 5. Error Code to FRU Index 185
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