When The Run Led Does Not Turn On - Mitsubishi MELSEC L Series User Manual

15.1.3

When the RUN LED does not turn on

Check the following:
The ERR. LED of the CPU module is flashing.
The ERR. LED of the CPU module is on.
The remote STOP operation, remote PAUSE operation or
STOP instruction is being executed.
If the RUN LED does not turn on even after taking the above actions, the possible cause is a hardware failure.
Please consult your local Mitsubishi service center or representative, explaining a detailed description of the problem.
Check item
CHAPTER 15 TROUBLESHOOTING
Action
An error exists.
Check the error using a display unit or a programming tool.
( Page 94, Section 15.2)
The module is affected by excessive noise.
Take noise reduction measures.
( Page 383, Appendix 7)
When the remote STOP or remote PAUSE operation is being
executed, execute the remote RUN operation. When the
STOP instruction is being executed, change the operating
status of the CPU module from STOP to RUN.
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