Service request numbers

Service request numbers (SRNs) serve as diagnostic aids to help users determine the source of a hardware problem. Diagnostic applications report problems by using SRNs. The SRN identifies the component that detected the error code and describes the error condition. Use this publication to identify a list of possible failing items and to find information about any additional isolation procedures.

Service request number formats

If your System reference code (SRC) is a 5-digit hexadecimal number or contains a hyphen in the following formats (xxxxx, xxx-xxx, xxx-xxxx, xxxx-xxx, xxxx-xxxx), it is an SRN.

Using Service request numbers

The SRN tables use the following format:

• The Service Request Number (SRN) contains numbers that represent specific failures of specific functions.
• SRNs contain Failing Function Codes (FFCs). The FFC represents field replaceable units (FRUs) of the system unit. When available, the FFC links to the FRU that contains this function for each specific system unit.
• The SRN also contains an action or servicer response. Typically it is brief description of the failure that this SRN represents and an isolation procedure that should be used when servicing the system.