Download 2080-UM005A-EN-E Micro820 Programmable Controllers User

Troubleshooting Appendix B
Indicator
Behavior
Probable Error
Probable Cause
Recommended Action
All indicators off
No input power or
power supply error
No line power
Verify proper line voltage and connections to the controller.
Power supply
overloaded
This problem can occur intermittently if power supply is overloaded when
output loading and temperature varies.
Hardware faulted
Processor hardware
error
Cycle power. Contact your local Allen-Bradley representative if the error
persists.
Loose wiring
Verify connections to the controller.
Power and FAULT
indicators on solid
Power on with
solid indicator and
FAULT indicator
flashing
Application fault
Hardware/software
major fault detected
For error codes and status information, refer to the Connected Components
Workbench online Help
Power on with
solid indicator and
FAULT indicator
flashing
Operating system fault
Firmware upgrade
unsuccessful
See Flash Upgrade Your Micro800 Firmware on page 121.
Error codes
This section lists possible error codes for your controller, as well as recommended
actions for recovery.
If an error persists after performing the recommended action, contact your local
Rockwell Automation technical support representative. For contact information,
go to
http://support.rockwellautomation.com/MySupport.asp
Rockwell Automation Publication 2080-UM005A-EN-E - December 2013
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