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12 TROUBLESHOOTING
12 - 10
(3) Output module with protective function
Target module: ST1Y -TPE3
(a) When ERR. LED is flickering
ERR. LED is flickering.
Is the wiring
connected to the
output terminal
shorted?
Not shorted
Is overcurrent
flowing due to
overload?
NO
Change the output
module whose ERR.
LED is flickering.
Has the ERR.
LED turned
off?
YES
Completed
Shorted
Repair the shorted wiring.
Confirm the external device
YES
specifications and reduce
the load current to within
the specification range.
NO
Please contact your local
Mitsubishi service center or
representative, explaining a
detailed description of the
problem.
MELSEC-ST
12 - 10
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Table of Contents
Troubleshooting
