Rockwell Automation 1768-PA3_PB3 CompactLogix Power Supplies Installation Instructions - Manual (Page 25)

If the
controller PWR
status
indicator is It means Take this action
Off Either the controller
or the power supply is
not operating
properly. Most likely,
in this case, the
controller has an
issue because the
power supply PWR
status indicator is
green.
Green The controller is
operating properly
with respect to
sending power to the
1768 modules. Check the controller I/O PWR status indicator to make sure the
entire system is operating properly.
Red One of the following:
1768 CompactLogix Power Supplies 25
Publication 1768-IN001B-EN-P - July 2006
A. Make sure all modules in the system are installed properly
and fully engaged with each other.
B. If the controller PWR status indicator remains off, move to
the next step.
C. Remove any 1768 communication or motion modules.
D. Reinstall the controller directly next to the power supply and
reapply power.
E. If the controller PWR status indicator remains off, replace
the controller.
F. If the controller PWR status indicator on the new controller
remains off, replace the power supply.
• The controller
needs to be
replaced.
• If 1768
communication
and motion
modules are
installed in the
system, one of
the 1768 modules
needs to be
replaced.
A. Disconnect all of the 1768 communication and motion
modules from the system.
B. Reapply power.
C. Check the controller PWR status indicator.
• If the status indicator is green, the controller is operating
properly and one of the other 1768 modules needs to be
replaced.
• To troubleshoot the 1768 modules, see their respective
installation instructions. For a list of related publications,
see Additional Resources.
• If the status indicator remains red, replace the controller.