Flowchart For When The "Power" Led Does Not Turn On - Mitsubishi Electric MELSEC QS SERIES User Manual

9
TROUBLESHOOTING

9.2.1 Flowchart for when the "POWER" LED does not turn on

The following shows the flowchart for when the "POWER" LED does not turn on at power
ON of the safety remote I/O module or during operation of the programmable controller.
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- 4 9.2 Troubleshooting with LEDs
9.2.1 Flowchart for when the "POWER" LED does not turn on
"POWER" LED is not
turned on.
Are LEDs other than "POWER"
LED turned on?
NO
Is the power supplied to the
safety remote I/O module?
YES
Check the supplied power
status by a tester.
Is the power supply voltage
within the specification range?
NO
Supply the following range power
voltage19.2 to 28.8VDC
Figure 9.2 Flowchart for when the "POWER" LED does not turn on
YES
Replace the safety remote
I/O module.
NO
Supply the power to the
safety remote I/O module.
YES
Replace the safety remote
I/O module.