GE VersaPoint IC220PBI002 User Manual page 93

The example below shows error states. Either errors have been detected on
module 5 or module 4 has broken down. The illustration below shows the behavior
of the diagnostic indicators on the adjacent modules.
I/O Error
Error:
Effect:
Backplane Error
Error:
Effect:
GFK-1911B Chapter 6 Diagnostics
1
A No error
B I/O error
C Backplane error
Short circuit on module 4 (IC220MDL751)
Control system: Error message to the control system (I/O error)
NIU: FS and FN flash
Module 4: Green D LED flashes at 2Hz
Other modules: Remain unchanged
Incoming bus after module 2 and before module 4 has
been interrupted
Control system: Error can be located by the control system
NIU: FS and FN flash
Module 4: Green D LED flashes at 4Hz (bus error)
Other modules: Green D LEDs on all other modules flash at 0.5Hz
2 3 4
LED on or flashing at 0.5Hz / 2Hz / 4Hz (On /
slow / medium / fast)
6
5 6
6-13