Chapter 9. DiagnosticsGFK-2950C February 2018 3979.4 Controller Fault Descriptions and Corrective ActionsEach fault explanation contains a fault description and instructions to correct the fault. Many faultdescriptions have multiple causes. In these cases, the error code and additional fault information areused to distinguish among fault conditions sharing the same fault description.9.4.1 Controller Fault GroupsGroup Name Default Fault Action16 Configurable1 Loss of or Missing Rack Diagnostic Yes4 Loss of or Missing Option Module Diagnostic Yes5 Addition of, or Extra Rack N/A No8 Reset of, Addition of, or Extra Option Module N/A No11 System Configuration Mismatch Fatal17 Yes12 System Bus Error Fatal Yes13 CPU Hardware Failure N/A No14 Module Hardware Failure N/A No16 Option Module Software Failure N/A No17 Program or Block Checksum Failure Group N/A No18 Battery Status Group N/A No19 Constant Sweep Time Exceeded N/A No20 System Fault Table Full N/A No21 I/O Fault Table Full N/A No22 User Application Fault N/A No24 CPU Over Temperature Diagnostic Yes128 System Bus Failure N/A No129 No User Program on Power-up N/A No130 Corrupted User Program on Power-up N/A No131 Window Completion Failure N/A No132 Password Access Failure N/A No134 Null System Configuration for RUN Mode N/A No135 CPU System Software Failure N/A No137 Communications Failure During Store N/A No140 Non-critical CPU Software Event N/A No16 The fault action indicated is not applicable if the fault is displayed as informational. Faults displayed as informational,always behave as informational.17 If a system configuration mismatch occurs when the CPU is in RUN Mode, the fault action will be Diagnostic regardless ofthe fault configuration. For additional information, refer to Fault Parameters in PACSystems RX7i, RX3i and RSTi-EP CPUReference Manual, GFK-2222.