Mitsubishi Electric MELCEC Q Series - Flow for Actions When the MODE LED Turns off

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11. TROUBLESHOOTING
11.2.3 Flow for actions when the MODE LED turns off
The corrective action when the MODE LED turns off at power on is described.
NO
YES
YES
NO
YES
NO YES
NO
YES
NO YES
NO
YES
NO YES
NO
The MODE LED turns off.
Is the power
supplied?
Is each module
correctly installed?
Is the reset switch of
the CPU module
canceled?
Supply the power.
Does the
MODE LED
turn on?
Install each module correctly.
Does the MODE LED
turn on?
Cancel the reset.
Is the extension cable
properly connected?
Connect the extension cable
properly. (From OUT connector
to IN connector)
Completion
Does the MODE LED
turn on?
Describe the problem to the
nearest system service, retail
store, or corporate office, and
obtain advice.
Does the MODE LED
turn on?