When Power Led Of Power Supply Module Turns Off - Mitsubishi MELSEC-Q Series User Manual

18
TROUBLESHOOTING

18.2.1 When POWER LED of power supply module turns off

The following flowchart shows procedures to be taken when the POWER LED of the
power supply module turns off at the time of power-on or in operation of the C Controller
system.
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- 3 18.2 Troubleshooting
18.2.1 When POWER LED of power supply module turns off
The POWER LED turned off.
Is power
being supplied?
Yes
Is the power voltage
within the specified range?
Yes
Is the power
supply module fixed?
Yes
Is the overcurrent or
overvoltage protection
inactive?
Yes
Please consult your local
Mitsubishi service center or
representative, explaining the
details of the problem.
Figure 18.1 When POWER LED turns off on power supply module
No
Supply power.
No
Did the POWER LED turn on?
No
Change the supply voltage so that it
falls within the rated range.
No
Did the POWER LED turn on?
No
Fix the power supply module
securely.
No
Did the POWER LED turn on?
Turn off the input power supply.
No
Remove the cause (e.g. insufficient
power capacity, short circuit). Turn it
on after several minutes.
No
Did the POWER LED turn on?
Yes
Yes
Yes
Yes
END