Rockwell Automation 1772-LV,D17726.6.1 A and I MNL MINI-PLC-2/15 PROCESSO - Manual (Page 80)

Maintenance and Troubleshooting
Chapter 5
5Ć10
Table 5.B
Troubleshooting Chart
Controller Troubleshooting Indicators
Mode[1] Processor Memory Run DC ON Procedures to Correct Fault
ON OFF OFF ON 1. Cycle line power.
2. Replace Processor
T, R,
or R/P
OFF OFF OFF OFF 1. Check Power Supply fuse.
2. Check AC line voltage.
3. Cycle line power.
4. Verify Power supply load
does not exceed 6.5A
5. Replace System Power Supply
T or R ON ON OFF ON 1. Connect Industrial Terminal to
Processor and turn Mode Select
Switch to PROG.
2. If a run-time error occurred,
correct it.
3. If a Processor fault occurred, turn
keyswitch back to TEST or RUN.
4. Replace Processor
R or R/P OFF OFF OFF ON 1. Check AC line voltage.
2. Measure Power Supply output
voltages. Replace Power Supply.
3. Measure voltages through I/O
Power Cable. Replace I/O Power
Cable.
4. Replace Processor.
R/P OFF ON OFF ON 1. Connect Industrial Terminal to
Processor.
2. Correct run-time error.
R/P ON ON OFF ON 1. Turn Mode Select Switch to PROG
and back to RUN/PROG.
2. Replace Processor.
[1] T = TEST POSITION
R = RUN POSITION
R/P = RUN/PROGRAM POSITION