Mitsubishi Electric MELSEC Q Series User Manual page 68

(d) Execution of initialization
Perform the following operations to execute initialization.
(e) Countermeasures for abnormal completion
Flashing of the ERR.LED indicates abnormal completion.
When any error has occurred, take initialization steps again. If failure is detected again, any hardware error
may exist. Please consult your local Mitsubishi service center or representative, explaining the details of the
problem.
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1.
Move the RESET/SELECT switch to the RESET position.
Do not release the switch while pulling it down.
2.
Check that the MODE LED goes off.
3.
Move the RESET/SELECT switch back to the center.
Release the switch then it returns to its center position.
4.
Check that the MODE LED turns on in green.
During initialization, RUN LED and USER LED are flashed.
5.
Check that the USER LED goes off.
RUN LED goes off, and MODE LED is flashed green.
6.
Move the RESET/SELECT switch to the RESET position.
Do not release the switch while pulling it down.
7.
Check that the MODE LED goes off.
8.
Move the RESET/SELECT switch back to the center.
Release the switch then it returns to its center position.
9.
Check that the MODE LED is lit green.
During user CPU restarting, the U RDY LED flashes and,
when it is completed, the U RDY LED is lit.