Omron CQM1 Operation Manual page 129

Troubleshooting Flowcharts
Fatal Error Check The following flowchart can be used to troubleshoot fatal errors that occur while
the Power indicator is lit.
RUN indicator not lit.
No
Is the ERR/ALM
indicator lit?
Yes
Determine the cause
of the error with a
Peripheral Device.
Is PC mode displayed
on Peripheral Device?
Yes
Is a fatal error
displayed?
No
Switch to RUN or
MONITOR mode.
Is the RUN indi-
cator lit?
Yes
End
Yes
Is PC mode displayed
on Peripheral Device?
No
Turn the power
supply OFF, and
then ON again.
Yes
Identify the error, eliminate
its cause, and clear the
error.
No
Section 4-6
No
Replace the CPU Unit.
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