Flowchart For When The "Power" Led Turns Off - Mitsubishi MELSEC User Manual

12
TROUBLESHOOTING

12.2.3 Flowchart for when the "POWER" LED turns off

The following shows the flowchart for when the "POWER" LED of the power supply
module turns off at of the programmable controller power-on or during operation.
The "POWER" LED has turned off.
Has the
"ALIVE" LED of the
CPU module turned on?
Off
Is there a
power supply?
YES
Is the power
supply voltage within
the voltage range given in the
specifications?
YES
Is the power
supply module fixed?
YES
Remove all modules other than
the power supply module from
the base unit.
How is the "POWER" LED?
On
(To next page)
12.2.3 Flowchart for when the "POWER" LED turns off
On
The "POWER" LED of the power
supply module is faulty. (Replace it
by a normal power supply module.)
NO
Supply power.
Off
How is the "POWER" LED?
The supply voltage should be within
NO
the rated range.
Off
How is the "POWER" LED?
NO
Properly fix the power supply module.
Off
How is the "POWER" LED?
The base unit that includes the
Off
corresponding power supply module
is faulty.
12.2 Troubleshooting Flowchart
10
11
On
12
On
On
Completed
12
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