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213
Troubleshooting Flowcharts
Section 9-5
Yes
Check the voltage at
the IR 00002 and
IR 00003 terminals.
Check operation by using a
dummy input signal to turn the
input ON and OFF.
No
Are the terminal
screws loose or con-
nectors disconnected?
Operation OK?
Check input devices
LS1 and LS2.
Operation OK?
Wire correctly.
Is input wiring
correct?
Tighten the terminal
screws and connect
connectors.
Return to "start."
Are the IR 00002
and IR 00003 input indi-
cators operating
normally?
Replace the CPU Unit,
Expansion Unit, or
Expansion I/O Unit.
Operation OK?
Yes
Yes
Yes
Yes
No
No
No
No
No
No
Check the voltage at
the IR 00002 and
IR 00003 terminals.
A
From
previous
page
Yes
Replace the CPU Unit,
Expansion Unit, or
Expansion I/O Unit.
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