Chapter 5 - Troubleshooting; Diagnosing Problems; Error Recovery - Overland Data DLT LibraryXpress Series Service Manual

Chapter 5 — Troubleshooting

Diagnosing Problems

There are two main types of problems that can cause the LibraryXpress System to
malfunction or fail to perform correctly: platform problemsgeneral drive errors. Some errors
cause Fault Symptom Codes (FSC) to be displayed on the control panel of the Global Control
Module, along with a description of the fault. Other errors cause the Alert lamp to light, while
an FSC is displayed on the control panel of one of the other modules in the system. Error
Recovery Procedures (ERP) are available for some FSCs. They are described in this chapter.
Platform Problems:
These errors arise out of incorrect installation and configuration. The most common
characteristic of this type of error is that the system appears to operate normally, except that
no data can be interchanged. You may or may not get an error code on the Global Control
Module control panel. To identify an error caused by this type of problem, check your
installation and configuration setup, referring back to Chapter 2 - Installation.
General Drive Errors:
These errors usually result from a) a miscommunication between the Global Control Module
and one or more slave modules, or between a module's processor and a drive processor or b) a
mechanical malfunction within the LibraryXpress System. In most cases, both of these types
of errors report an error message and an FSC on the Global Control Module control panel,
and often on the control panel of a slave module. The chief exceptions are power supply
problems and display malfunctions which can interfere with the display of error messages.
The FSC is used to report errors to your technical support representative, and in some cases
can be used to determine a recovery procedure.
A simple error recovery procedure is displayed on the bottom line of the control panel display.
Some errors can be cleared by pressing the Enter button on the control panel, others by
cycling the power to the module. Often the module will resume normal operation. Other errors
are repeated when the operation is attempted again. Such recurrent errors may require more
extensive recovery procedures such as replacement of a part.

Error Recovery

Figure 5-1 is a flow chart that outlines the recommended steps for error recovery. This chart
should be followed in all cases.
Error Recovery Procedures (ERP) are described in detail in Table 5-1. Fault Symptom Codes are

Chapter 5 - Troubleshooting

listed in Table 5-2. ERP are listed for each FSC.
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