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12.2 Troubleshooting Flowchart
12.2.3 Flowchart for when the "POWER" LED turns off
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.
(To next page)
The "POWER" LED has turned off.
Is there a
power supply?
Is the power
supply module fixed?
Completed
Properly fix the power supply module.
The base unit including the
corresponding power supply module
is faulty.
(Replace with a well-functioning
base unit.)
How is the "POWER" LED?
How is the "POWER" LED?
Remove all modules other than
the power supply module from
the base unit.
YES
YES
YES
NO
NO
NO
Off
Off
Off
Off
On
On
On
On
Supply power.
Off
The "POWER" LED of the power
supply module is faulty. (Replace it
by a normal power supply module.)
On
How is the "POWER" LED?
The supply voltage should be within
the rated range.
How is the "POWER" LED?
Is the power
supply voltage within
the voltage range given in the
specifications?
Has the
"ALIVE" LED of the
CPU module turned on?