Rockwell Automation 1771-P4R_P6R Allen-Bradley Redundent Power Installation Instructions - Manual (Page 15)

Allen-Bradley Redundant Power Supplies 15
Publication 1771-IN030B-EN-P - July 2002
Troubleshooting a Single Power Supply
If you have a single power supply installed in an I/O chassis and
its P/S ACTIVE indicator is off, follow the troubleshooting
flowchart below.
Turn off the power supply and wait 5 seconds.
Check I.D. Selection and Configuration switch settings.
Then turn on the power supply.
P/S Active
ON?
yes
no
Done
Turn off the power supply and wait 5 seconds.
Pull the power supply half way out of the chassis and
turn it on to test it without a load.
P/S Active
Off?
yes
no
If ac voltage is OK, replace
the power supply.
Turn off the power supply and wait 5 seconds.
Firmly seat the power supply into the backplane then
turn on the power supply again.
P/S Active
ON?
no
Done
Try replacing the power supply with a known good
power supply.
P/S Active
ON?
yes
Done
P/S Active
ON?
yes
no
Done
Try replacing the I/O modules (one of them could be
overloading the power supply).