Troubleshooting Flowchart - Mitsubishi Electric MELCEC Q Series User Manual

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

11.2.1 Troubleshooting flowchart

The error definitions are described by events.
Error occurrence details
The POWER LED is off.
The MODE LED is off.
The RUN LED is off.
The RUN LED is flashing.
The ERR. LED is on.
The ERR. LED is flashing.
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
Section 11.2.2.
LED is turned off" in
To "Flow for actions when the MODE
Section 11.2.3.
LED turns off" in
To "Flow for actions when the RUN
Section 11.2.4.
LED is turned off" in
To "Flow for actions when the RUN
Section 11.2.5.
LED is flashing" in
To "Flow for actions when the ERR.
Section 11.2.6.
LED is turned on" in
To "Flow for actions when the ERR.
Section 11.2.7.
LED is flashing" in
To "Flow for actions when the output
module's output load does not turn on" in
Section 11.2.8.
To "Flow for actions when the program
Section 11.2.9.
cannot be written" in
To "Flow for actions when the CPU module is
Section 11.2.10.
not started up" in
11 - 2