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Fatal Error Check
Identify the error, eliminate
its cause, and clear the
error.
Follow the Memory Error
Check flowchart if a
memory error has occurred.
Is the ERR/ALM
indicator lit?
Determine the cause
of the error with a
Peripheral Device.
End
RUN indicator not lit.
Replace the CPU
Unit.
Is PC mode displayed
on Peripheral Device?
Turn the power
supply OFF, and
then ON again.
Switch to RUN or
MONITOR mode.
No
Yes
Is a fatal error
displayed?
Is PC mode displayed
on Peripheral Device?
No
Yes
Yes
No
Is the RUN indi-
cator lit?
No
Yes
Yes
No
Troubleshooting Flowcharts
Section 5-6