Troubleshooting Procedure - Mitsubishi MELSEC-A A2USHCPU-S1 User Manual

11. TROUBLESHOOTING
11.2 Troubleshooting
The error definition determination method, error definition corresponding to the error code,
and corrective actions are described.

11.2.1 Troubleshooting procedure

The error definitions are described by events.
Error occurrence details
The "POWER" LED is OFF.
The "RUN" LED is OFF.
The "RUN" LED is flickering.
The "ERROR" LED is ON.
The "ERROR" LED is
flickering.
The I/O module will not
operate correctly.
The program cannot be
written.
The CPU module is
not started up.
To "Flow for actions when the "POWER"
LED is turned OFF" in Section 11.2.2.
To "Flow for actions when the "RUN"
LED is turned OFF" in Section 11.2.3.
To "Flow for actions when the "RUN"
LED is flickering" in
Section 11.2.4.
To "Flow for actions when the "ERROR"
LED is turned ON" in
Section 11.2.5.
To "Flow for actions when the "ERROR"
LED is flickering" in
Section 11.2.6.
To "Flow for actions when the output
module's output load does not turn ON" in
Section 11.2.7.
To "Flow for actions when the program
cannot be written" in Section 11.2.8.
To "Flow for actions when the CPU module is
not started up" in
Section 11.2.9.
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