507
Troubleshooting Flowcharts
Section 8-7
Fatal Error Check
The following flowchart can be used to troubleshoot fatal errors that occur
while the Power indicator is lit.
Identify the error
eliminate its cause, and clear
the error.
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.
Correct the power
supply.
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
Is PC mode displayed
on Peripheral Device?
Switch to RUN or
MONITOR mode.
(see page 503)
